/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/chl-chromosome-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:52:24,233 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:52:24,313 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 11:52:24,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:52:24,354 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:52:24,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:52:24,355 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:52:24,355 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:52:24,356 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:52:24,360 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:52:24,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:52:24,361 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:52:24,361 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:52:24,362 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:52:24,363 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:52:24,363 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:52:24,363 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:52:24,363 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:52:24,364 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:52:24,364 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:52:24,364 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:52:24,365 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:52:24,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:52:24,365 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:52:24,366 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:52:24,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:52:24,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:52:24,366 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:52:24,367 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:52:24,367 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:52:24,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:52:24,368 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:52:24,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:52:24,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:52:24,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:52:24,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:52:24,657 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:52:24,657 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:52:24,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-11-17 11:52:25,856 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:52:26,087 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:52:26,087 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-11-17 11:52:26,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c14152d9/29b5fc1d54674197ad4e9553cd237726/FLAGf4f241c4a [2023-11-17 11:52:26,113 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c14152d9/29b5fc1d54674197ad4e9553cd237726 [2023-11-17 11:52:26,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:52:26,117 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:52:26,118 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:52:26,118 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:52:26,121 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:52:26,122 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1e9cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26, skipping insertion in model container [2023-11-17 11:52:26,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,142 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:52:26,334 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2023-11-17 11:52:26,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:52:26,365 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:52:26,384 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2023-11-17 11:52:26,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:52:26,404 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:52:26,404 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26 WrapperNode [2023-11-17 11:52:26,404 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:52:26,405 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:52:26,405 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:52:26,406 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:52:26,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,419 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,451 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 201 [2023-11-17 11:52:26,451 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:52:26,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:52:26,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:52:26,452 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:52:26,461 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,465 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,482 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,483 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,487 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:52:26,488 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:52:26,488 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:52:26,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:52:26,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (1/1) ... [2023-11-17 11:52:26,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:52:26,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:26,526 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 11:52:26,557 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 11:52:26,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:52:26,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:52:26,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:52:26,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:52:26,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 11:52:26,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 11:52:26,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 11:52:26,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 11:52:26,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:52:26,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 11:52:26,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:52:26,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:52:26,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:52:26,572 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 11:52:26,693 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:52:26,695 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:52:26,998 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:52:27,389 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:52:27,389 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 11:52:27,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:52:27 BoogieIcfgContainer [2023-11-17 11:52:27,391 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:52:27,394 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:52:27,395 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:52:27,397 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:52:27,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:52:26" (1/3) ... [2023-11-17 11:52:27,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200e235d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:52:27, skipping insertion in model container [2023-11-17 11:52:27,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:26" (2/3) ... [2023-11-17 11:52:27,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200e235d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:52:27, skipping insertion in model container [2023-11-17 11:52:27,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:52:27" (3/3) ... [2023-11-17 11:52:27,401 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2023-11-17 11:52:27,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:52:27,419 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:52:27,420 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:52:27,474 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:52:27,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 23 transitions, 60 flow [2023-11-17 11:52:27,547 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2023-11-17 11:52:27,548 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:52:27,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 4/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2023-11-17 11:52:27,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 23 transitions, 60 flow [2023-11-17 11:52:27,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 20 transitions, 52 flow [2023-11-17 11:52:27,562 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:52:27,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 20 transitions, 52 flow [2023-11-17 11:52:27,590 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 23 places, 20 transitions, 52 flow [2023-11-17 11:52:27,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 20 transitions, 52 flow [2023-11-17 11:52:27,604 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2023-11-17 11:52:27,605 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:52:27,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2023-11-17 11:52:27,606 INFO L119 LiptonReduction]: Number of co-enabled transitions 54 [2023-11-17 11:52:27,715 INFO L134 LiptonReduction]: Checked pairs total: 54 [2023-11-17 11:52:27,716 INFO L136 LiptonReduction]: Total number of compositions: 1 [2023-11-17 11:52:27,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:52:27,741 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;@47857ce9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:52:27,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:52:27,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:52:27,753 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2023-11-17 11:52:27,753 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:52:27,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:27,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:27,754 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 11:52:27,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:27,759 INFO L85 PathProgramCache]: Analyzing trace with hash 909371950, now seen corresponding path program 1 times [2023-11-17 11:52:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:27,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121026966] [2023-11-17 11:52:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:27,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:28,229 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 11:52:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:28,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121026966] [2023-11-17 11:52:28,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121026966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:28,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:28,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:52:28,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235544784] [2023-11-17 11:52:28,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:28,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:52:28,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:28,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:52:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:52:28,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:28,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:28,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:28,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:28,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:28,358 INFO L124 PetriNetUnfolderBase]: 42/79 cut-off events. [2023-11-17 11:52:28,358 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:52:28,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 79 events. 42/79 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 24 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 120. Up to 78 conditions per place. [2023-11-17 11:52:28,362 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 17 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2023-11-17 11:52:28,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 96 flow [2023-11-17 11:52:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:52:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:52:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2023-11-17 11:52:28,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-17 11:52:28,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 32 transitions. [2023-11-17 11:52:28,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 32 transitions. [2023-11-17 11:52:28,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:28,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 32 transitions. [2023-11-17 11:52:28,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:28,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:28,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:28,387 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 32 transitions. [2023-11-17 11:52:28,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 96 flow [2023-11-17 11:52:28,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 11:52:28,392 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 64 flow [2023-11-17 11:52:28,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2023-11-17 11:52:28,396 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-17 11:52:28,397 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 64 flow [2023-11-17 11:52:28,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:28,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:28,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:28,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:52:28,398 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 11:52:28,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:28,405 INFO L85 PathProgramCache]: Analyzing trace with hash -403023048, now seen corresponding path program 1 times [2023-11-17 11:52:28,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:28,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102049135] [2023-11-17 11:52:28,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:28,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:28,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:28,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102049135] [2023-11-17 11:52:28,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102049135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:28,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856411506] [2023-11-17 11:52:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:28,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:28,597 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 11:52:28,602 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 11:52:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:28,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 11:52:28,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:28,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:28,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856411506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:28,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:28,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-11-17 11:52:28,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705675690] [2023-11-17 11:52:28,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:28,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:52:28,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:52:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-17 11:52:28,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:28,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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 11:52:28,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:28,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:28,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:28,939 INFO L124 PetriNetUnfolderBase]: 42/85 cut-off events. [2023-11-17 11:52:28,940 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:52:28,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 85 events. 42/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 24 based on Foata normal form. 3/71 useless extension candidates. Maximal degree in co-relation 163. Up to 78 conditions per place. [2023-11-17 11:52:28,943 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 17 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2023-11-17 11:52:28,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 142 flow [2023-11-17 11:52:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:52:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:52:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 51 transitions. [2023-11-17 11:52:28,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2023-11-17 11:52:28,946 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 51 transitions. [2023-11-17 11:52:28,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 51 transitions. [2023-11-17 11:52:28,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:28,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 51 transitions. [2023-11-17 11:52:28,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 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 11:52:28,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 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 11:52:28,950 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 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 11:52:28,950 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 64 flow. Second operand 6 states and 51 transitions. [2023-11-17 11:52:28,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 142 flow [2023-11-17 11:52:28,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:28,958 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 126 flow [2023-11-17 11:52:28,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-11-17 11:52:28,962 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2023-11-17 11:52:28,963 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 126 flow [2023-11-17 11:52:28,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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 11:52:28,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:28,963 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:28,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:52:29,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:29,171 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 11:52:29,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash -427112678, now seen corresponding path program 2 times [2023-11-17 11:52:29,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:29,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930465568] [2023-11-17 11:52:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:29,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:52:29,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:29,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930465568] [2023-11-17 11:52:29,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930465568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:29,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230742814] [2023-11-17 11:52:29,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:52:29,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:29,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:29,402 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 11:52:29,405 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 11:52:29,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 11:52:29,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:29,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 11:52:29,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-17 11:52:29,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:52:29,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230742814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:29,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:52:29,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-17 11:52:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399943695] [2023-11-17 11:52:29,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:29,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:52:29,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:29,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:52:29,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-17 11:52:29,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:29,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:29,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:29,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:29,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:29,665 INFO L124 PetriNetUnfolderBase]: 66/133 cut-off events. [2023-11-17 11:52:29,665 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:52:29,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 133 events. 66/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 316 event pairs, 24 based on Foata normal form. 4/106 useless extension candidates. Maximal degree in co-relation 252. Up to 86 conditions per place. [2023-11-17 11:52:29,666 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 39 selfloop transitions, 3 changer transitions 2/44 dead transitions. [2023-11-17 11:52:29,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 44 transitions, 252 flow [2023-11-17 11:52:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:52:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:52:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2023-11-17 11:52:29,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2023-11-17 11:52:29,668 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 49 transitions. [2023-11-17 11:52:29,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 49 transitions. [2023-11-17 11:52:29,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:29,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 49 transitions. [2023-11-17 11:52:29,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 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 11:52:29,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:29,670 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:29,670 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 126 flow. Second operand 4 states and 49 transitions. [2023-11-17 11:52:29,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 44 transitions, 252 flow [2023-11-17 11:52:29,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 236 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:29,673 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 130 flow [2023-11-17 11:52:29,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-17 11:52:29,674 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2023-11-17 11:52:29,674 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 130 flow [2023-11-17 11:52:29,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:29,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:29,674 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:29,685 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 11:52:29,882 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,SelfDestructingSolverStorable2 [2023-11-17 11:52:29,883 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 11:52:29,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:29,884 INFO L85 PathProgramCache]: Analyzing trace with hash 560889490, now seen corresponding path program 3 times [2023-11-17 11:52:29,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:29,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272221573] [2023-11-17 11:52:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:29,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:52:30,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:30,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272221573] [2023-11-17 11:52:30,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272221573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:30,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653194355] [2023-11-17 11:52:30,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:52:30,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:30,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:30,072 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 11:52:30,076 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 11:52:30,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 11:52:30,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:30,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 11:52:30,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-17 11:52:30,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:52:30,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653194355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:30,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:52:30,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-17 11:52:30,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974457146] [2023-11-17 11:52:30,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:30,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:52:30,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:52:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-17 11:52:30,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:30,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:30,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:30,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:30,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:30,339 INFO L124 PetriNetUnfolderBase]: 102/201 cut-off events. [2023-11-17 11:52:30,340 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-17 11:52:30,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 201 events. 102/201 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 604 event pairs, 42 based on Foata normal form. 2/162 useless extension candidates. Maximal degree in co-relation 480. Up to 138 conditions per place. [2023-11-17 11:52:30,342 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 45 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-11-17 11:52:30,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 292 flow [2023-11-17 11:52:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:52:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:52:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2023-11-17 11:52:30,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2023-11-17 11:52:30,343 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 47 transitions. [2023-11-17 11:52:30,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 47 transitions. [2023-11-17 11:52:30,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:30,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 47 transitions. [2023-11-17 11:52:30,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:30,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:30,348 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:30,348 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 130 flow. Second operand 4 states and 47 transitions. [2023-11-17 11:52:30,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 292 flow [2023-11-17 11:52:30,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 281 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:30,354 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 146 flow [2023-11-17 11:52:30,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-17 11:52:30,355 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-11-17 11:52:30,355 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 146 flow [2023-11-17 11:52:30,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:30,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:30,355 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:30,367 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 11:52:30,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:30,563 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 11:52:30,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1636425258, now seen corresponding path program 4 times [2023-11-17 11:52:30,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:30,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418363950] [2023-11-17 11:52:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:30,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:52:30,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:30,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418363950] [2023-11-17 11:52:30,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418363950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:30,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945065782] [2023-11-17 11:52:30,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:52:30,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:30,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:30,728 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 11:52:30,747 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 11:52:30,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:52:30,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:30,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 11:52:30,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:52:30,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:52:30,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945065782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:30,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:30,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-17 11:52:30,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843249390] [2023-11-17 11:52:30,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:30,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:52:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:52:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:52:30,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:30,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 146 flow. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:30,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:30,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:30,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:31,089 INFO L124 PetriNetUnfolderBase]: 102/203 cut-off events. [2023-11-17 11:52:31,089 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2023-11-17 11:52:31,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 203 events. 102/203 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 565 event pairs, 74 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 560. Up to 194 conditions per place. [2023-11-17 11:52:31,091 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 21 selfloop transitions, 12 changer transitions 0/33 dead transitions. [2023-11-17 11:52:31,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 224 flow [2023-11-17 11:52:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:52:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:52:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 52 transitions. [2023-11-17 11:52:31,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30952380952380953 [2023-11-17 11:52:31,093 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 52 transitions. [2023-11-17 11:52:31,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 52 transitions. [2023-11-17 11:52:31,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:31,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 52 transitions. [2023-11-17 11:52:31,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 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 11:52:31,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:31,095 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:31,095 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 146 flow. Second operand 7 states and 52 transitions. [2023-11-17 11:52:31,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 224 flow [2023-11-17 11:52:31,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 220 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:31,098 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 188 flow [2023-11-17 11:52:31,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-11-17 11:52:31,099 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2023-11-17 11:52:31,099 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 188 flow [2023-11-17 11:52:31,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:31,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:31,099 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:31,108 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 11:52:31,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:31,306 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 11:52:31,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash 889415612, now seen corresponding path program 5 times [2023-11-17 11:52:31,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:31,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154996368] [2023-11-17 11:52:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:31,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:31,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:31,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154996368] [2023-11-17 11:52:31,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154996368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:31,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:31,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:52:31,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910712052] [2023-11-17 11:52:31,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:31,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:52:31,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:31,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:52:31,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:52:31,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:31,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:31,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:31,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:31,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:31,613 INFO L124 PetriNetUnfolderBase]: 118/231 cut-off events. [2023-11-17 11:52:31,613 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-11-17 11:52:31,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 231 events. 118/231 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 756 event pairs, 14 based on Foata normal form. 12/215 useless extension candidates. Maximal degree in co-relation 602. Up to 188 conditions per place. [2023-11-17 11:52:31,615 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 43 selfloop transitions, 5 changer transitions 1/49 dead transitions. [2023-11-17 11:52:31,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 340 flow [2023-11-17 11:52:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:52:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:52:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2023-11-17 11:52:31,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-11-17 11:52:31,617 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2023-11-17 11:52:31,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2023-11-17 11:52:31,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:31,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2023-11-17 11:52:31,617 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 11:52:31,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:31,618 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:31,618 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 188 flow. Second operand 4 states and 44 transitions. [2023-11-17 11:52:31,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 340 flow [2023-11-17 11:52:31,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 316 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-17 11:52:31,621 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 195 flow [2023-11-17 11:52:31,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-11-17 11:52:31,622 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2023-11-17 11:52:31,622 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 195 flow [2023-11-17 11:52:31,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:31,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:31,622 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:31,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:52:31,623 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 11:52:31,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:31,623 INFO L85 PathProgramCache]: Analyzing trace with hash -2085145428, now seen corresponding path program 6 times [2023-11-17 11:52:31,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:31,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22698848] [2023-11-17 11:52:31,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:31,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:31,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:31,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22698848] [2023-11-17 11:52:31,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22698848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:31,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:31,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:52:31,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662252775] [2023-11-17 11:52:31,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:31,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:52:31,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:31,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:52:31,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:52:31,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:31,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 195 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:31,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:31,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:31,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:31,873 INFO L124 PetriNetUnfolderBase]: 114/221 cut-off events. [2023-11-17 11:52:31,874 INFO L125 PetriNetUnfolderBase]: For 295/295 co-relation queries the response was YES. [2023-11-17 11:52:31,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 221 events. 114/221 cut-off events. For 295/295 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 651 event pairs, 24 based on Foata normal form. 8/199 useless extension candidates. Maximal degree in co-relation 644. Up to 162 conditions per place. [2023-11-17 11:52:31,876 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 42 selfloop transitions, 6 changer transitions 1/49 dead transitions. [2023-11-17 11:52:31,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 349 flow [2023-11-17 11:52:31,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:52:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:52:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2023-11-17 11:52:31,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-17 11:52:31,877 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 42 transitions. [2023-11-17 11:52:31,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 42 transitions. [2023-11-17 11:52:31,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:31,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 42 transitions. [2023-11-17 11:52:31,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 10.5) internal successors, (42), 4 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 11:52:31,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:31,878 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:31,878 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 195 flow. Second operand 4 states and 42 transitions. [2023-11-17 11:52:31,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 349 flow [2023-11-17 11:52:31,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:31,881 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 228 flow [2023-11-17 11:52:31,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-11-17 11:52:31,882 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-11-17 11:52:31,882 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 228 flow [2023-11-17 11:52:31,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:31,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:31,882 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:31,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:52:31,883 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 11:52:31,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:31,883 INFO L85 PathProgramCache]: Analyzing trace with hash -668441026, now seen corresponding path program 1 times [2023-11-17 11:52:31,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:31,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558574790] [2023-11-17 11:52:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:31,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:32,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:32,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558574790] [2023-11-17 11:52:32,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558574790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:32,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:32,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:52:32,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45095511] [2023-11-17 11:52:32,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:32,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:52:32,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:32,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:52:32,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:52:32,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:32,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 228 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 11:52:32,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:32,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:32,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:32,248 INFO L124 PetriNetUnfolderBase]: 99/192 cut-off events. [2023-11-17 11:52:32,248 INFO L125 PetriNetUnfolderBase]: For 428/428 co-relation queries the response was YES. [2023-11-17 11:52:32,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 192 events. 99/192 cut-off events. For 428/428 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 528 event pairs, 36 based on Foata normal form. 6/172 useless extension candidates. Maximal degree in co-relation 615. Up to 148 conditions per place. [2023-11-17 11:52:32,250 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 43 selfloop transitions, 6 changer transitions 3/52 dead transitions. [2023-11-17 11:52:32,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 52 transitions, 397 flow [2023-11-17 11:52:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:52:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:52:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2023-11-17 11:52:32,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-11-17 11:52:32,251 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2023-11-17 11:52:32,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2023-11-17 11:52:32,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:32,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2023-11-17 11:52:32,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:32,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:32,252 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:32,252 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 228 flow. Second operand 4 states and 46 transitions. [2023-11-17 11:52:32,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 52 transitions, 397 flow [2023-11-17 11:52:32,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 390 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:32,256 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 249 flow [2023-11-17 11:52:32,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-11-17 11:52:32,258 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2023-11-17 11:52:32,258 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 249 flow [2023-11-17 11:52:32,259 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 11:52:32,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:32,259 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:32,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:52:32,260 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 11:52:32,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1192229515, now seen corresponding path program 1 times [2023-11-17 11:52:32,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:32,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107138653] [2023-11-17 11:52:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:52:32,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:32,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107138653] [2023-11-17 11:52:32,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107138653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:32,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:32,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:52:32,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450630151] [2023-11-17 11:52:32,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:32,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:52:32,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:52:32,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:52:32,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:32,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 249 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 11:52:32,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:32,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:32,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:32,565 INFO L124 PetriNetUnfolderBase]: 85/162 cut-off events. [2023-11-17 11:52:32,565 INFO L125 PetriNetUnfolderBase]: For 513/513 co-relation queries the response was YES. [2023-11-17 11:52:32,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 162 events. 85/162 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 392 event pairs, 27 based on Foata normal form. 8/146 useless extension candidates. Maximal degree in co-relation 553. Up to 125 conditions per place. [2023-11-17 11:52:32,567 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 44 selfloop transitions, 7 changer transitions 1/52 dead transitions. [2023-11-17 11:52:32,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 417 flow [2023-11-17 11:52:32,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:52:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:52:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2023-11-17 11:52:32,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-11-17 11:52:32,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2023-11-17 11:52:32,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2023-11-17 11:52:32,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:32,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2023-11-17 11:52:32,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:32,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:32,571 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 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 11:52:32,571 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 249 flow. Second operand 4 states and 46 transitions. [2023-11-17 11:52:32,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 417 flow [2023-11-17 11:52:32,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 391 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 11:52:32,575 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 262 flow [2023-11-17 11:52:32,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-11-17 11:52:32,576 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2023-11-17 11:52:32,576 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 262 flow [2023-11-17 11:52:32,577 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 11:52:32,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:32,577 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:32,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:52:32,577 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 11:52:32,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:32,577 INFO L85 PathProgramCache]: Analyzing trace with hash 210800447, now seen corresponding path program 1 times [2023-11-17 11:52:32,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:32,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703044514] [2023-11-17 11:52:32,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:32,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:33,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:33,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703044514] [2023-11-17 11:52:33,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703044514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:33,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097014226] [2023-11-17 11:52:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:33,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:33,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:33,566 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 11:52:33,585 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 11:52:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:33,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:52:33,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:33,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:33,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:52:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:33,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:34,382 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 11:52:34,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2023-11-17 11:52:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:34,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097014226] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:34,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:34,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2023-11-17 11:52:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701797267] [2023-11-17 11:52:34,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:34,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 11:52:34,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 11:52:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-11-17 11:52:34,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:34,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 262 flow. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:34,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:34,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:34,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:35,126 INFO L124 PetriNetUnfolderBase]: 154/293 cut-off events. [2023-11-17 11:52:35,126 INFO L125 PetriNetUnfolderBase]: For 687/687 co-relation queries the response was YES. [2023-11-17 11:52:35,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 293 events. 154/293 cut-off events. For 687/687 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 973 event pairs, 15 based on Foata normal form. 2/241 useless extension candidates. Maximal degree in co-relation 973. Up to 111 conditions per place. [2023-11-17 11:52:35,129 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 59 selfloop transitions, 23 changer transitions 14/96 dead transitions. [2023-11-17 11:52:35,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 693 flow [2023-11-17 11:52:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 11:52:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 11:52:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 123 transitions. [2023-11-17 11:52:35,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416666666666667 [2023-11-17 11:52:35,131 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 123 transitions. [2023-11-17 11:52:35,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 123 transitions. [2023-11-17 11:52:35,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:35,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 123 transitions. [2023-11-17 11:52:35,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.2) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:35,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 24.0) internal successors, (384), 16 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:35,134 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 24.0) internal successors, (384), 16 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:35,134 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 262 flow. Second operand 15 states and 123 transitions. [2023-11-17 11:52:35,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 693 flow [2023-11-17 11:52:35,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 96 transitions, 649 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-17 11:52:35,139 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 405 flow [2023-11-17 11:52:35,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=405, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2023-11-17 11:52:35,140 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 46 predicate places. [2023-11-17 11:52:35,140 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 405 flow [2023-11-17 11:52:35,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:35,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:35,140 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:35,151 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 11:52:35,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-17 11:52:35,347 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 11:52:35,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:35,348 INFO L85 PathProgramCache]: Analyzing trace with hash 689524605, now seen corresponding path program 2 times [2023-11-17 11:52:35,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:35,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360472827] [2023-11-17 11:52:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:35,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:36,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:36,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360472827] [2023-11-17 11:52:36,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360472827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:36,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34976742] [2023-11-17 11:52:36,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:52:36,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:36,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:36,117 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 11:52:36,138 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 11:52:36,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:52:36,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:36,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:52:36,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:36,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:36,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:52:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:36,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:36,798 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:52:36,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:52:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:36,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34976742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:36,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:36,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:52:36,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767154660] [2023-11-17 11:52:36,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:36,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 11:52:36,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:36,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 11:52:36,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:52:36,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:36,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 405 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:36,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:36,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:36,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:37,317 INFO L124 PetriNetUnfolderBase]: 165/308 cut-off events. [2023-11-17 11:52:37,317 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2023-11-17 11:52:37,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1304 conditions, 308 events. 165/308 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1018 event pairs, 26 based on Foata normal form. 1/297 useless extension candidates. Maximal degree in co-relation 1221. Up to 233 conditions per place. [2023-11-17 11:52:37,320 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 54 selfloop transitions, 23 changer transitions 1/78 dead transitions. [2023-11-17 11:52:37,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 78 transitions, 692 flow [2023-11-17 11:52:37,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:52:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:52:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 87 transitions. [2023-11-17 11:52:37,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020833333333333 [2023-11-17 11:52:37,322 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 87 transitions. [2023-11-17 11:52:37,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 87 transitions. [2023-11-17 11:52:37,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:37,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 87 transitions. [2023-11-17 11:52:37,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 7.25) internal successors, (87), 12 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 11:52:37,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:37,325 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:37,325 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 405 flow. Second operand 12 states and 87 transitions. [2023-11-17 11:52:37,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 78 transitions, 692 flow [2023-11-17 11:52:37,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 78 transitions, 619 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-11-17 11:52:37,330 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 489 flow [2023-11-17 11:52:37,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=489, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2023-11-17 11:52:37,331 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 52 predicate places. [2023-11-17 11:52:37,331 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 489 flow [2023-11-17 11:52:37,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:37,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:37,331 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:37,340 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 11:52:37,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:37,533 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 11:52:37,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1477175165, now seen corresponding path program 3 times [2023-11-17 11:52:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:37,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306475556] [2023-11-17 11:52:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:37,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 11:52:38,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:38,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306475556] [2023-11-17 11:52:38,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306475556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:38,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708506757] [2023-11-17 11:52:38,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:52:38,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:38,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:38,930 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 11:52:38,953 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 11:52:39,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:52:39,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:39,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:52:39,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:39,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:39,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:52:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:39,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:39,687 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:52:39,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:52:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:39,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708506757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:39,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:39,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 7] total 28 [2023-11-17 11:52:39,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401582435] [2023-11-17 11:52:39,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:39,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 11:52:39,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:39,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 11:52:39,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-11-17 11:52:39,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:39,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 489 flow. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:39,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:39,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:39,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:40,592 INFO L124 PetriNetUnfolderBase]: 177/333 cut-off events. [2023-11-17 11:52:40,593 INFO L125 PetriNetUnfolderBase]: For 1083/1083 co-relation queries the response was YES. [2023-11-17 11:52:40,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1424 conditions, 333 events. 177/333 cut-off events. For 1083/1083 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1158 event pairs, 28 based on Foata normal form. 5/326 useless extension candidates. Maximal degree in co-relation 1341. Up to 246 conditions per place. [2023-11-17 11:52:40,596 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 52 selfloop transitions, 27 changer transitions 10/89 dead transitions. [2023-11-17 11:52:40,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 795 flow [2023-11-17 11:52:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 11:52:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 11:52:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 109 transitions. [2023-11-17 11:52:40,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2838541666666667 [2023-11-17 11:52:40,597 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 109 transitions. [2023-11-17 11:52:40,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 109 transitions. [2023-11-17 11:52:40,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:40,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 109 transitions. [2023-11-17 11:52:40,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:40,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 24.0) internal successors, (408), 17 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:40,599 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 24.0) internal successors, (408), 17 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:40,599 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 489 flow. Second operand 16 states and 109 transitions. [2023-11-17 11:52:40,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 795 flow [2023-11-17 11:52:40,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 89 transitions, 739 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-11-17 11:52:40,606 INFO L231 Difference]: Finished difference. Result has 87 places, 68 transitions, 550 flow [2023-11-17 11:52:40,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=550, PETRI_PLACES=87, PETRI_TRANSITIONS=68} [2023-11-17 11:52:40,607 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 65 predicate places. [2023-11-17 11:52:40,607 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 68 transitions, 550 flow [2023-11-17 11:52:40,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:40,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:40,608 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:40,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 11:52:40,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:40,814 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 11:52:40,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:40,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1548993781, now seen corresponding path program 4 times [2023-11-17 11:52:40,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:40,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744418807] [2023-11-17 11:52:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:40,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:41,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:41,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744418807] [2023-11-17 11:52:41,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744418807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:41,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497644654] [2023-11-17 11:52:41,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:52:41,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:41,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:41,499 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 11:52:41,519 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 11:52:41,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:52:41,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:41,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:52:41,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:41,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:41,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:52:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:41,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:42,109 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:52:42,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:52:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:42,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497644654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:42,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:42,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-17 11:52:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100369314] [2023-11-17 11:52:42,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:42,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 11:52:42,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 11:52:42,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-17 11:52:42,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:42,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 68 transitions, 550 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:42,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:42,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:42,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:42,665 INFO L124 PetriNetUnfolderBase]: 172/322 cut-off events. [2023-11-17 11:52:42,665 INFO L125 PetriNetUnfolderBase]: For 1188/1188 co-relation queries the response was YES. [2023-11-17 11:52:42,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 322 events. 172/322 cut-off events. For 1188/1188 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1096 event pairs, 30 based on Foata normal form. 1/305 useless extension candidates. Maximal degree in co-relation 1378. Up to 234 conditions per place. [2023-11-17 11:52:42,668 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 60 selfloop transitions, 22 changer transitions 6/88 dead transitions. [2023-11-17 11:52:42,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 808 flow [2023-11-17 11:52:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:52:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:52:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2023-11-17 11:52:42,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 11:52:42,669 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 90 transitions. [2023-11-17 11:52:42,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 90 transitions. [2023-11-17 11:52:42,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:42,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 90 transitions. [2023-11-17 11:52:42,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 7.5) internal successors, (90), 12 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 11:52:42,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:42,671 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:42,671 INFO L175 Difference]: Start difference. First operand has 87 places, 68 transitions, 550 flow. Second operand 12 states and 90 transitions. [2023-11-17 11:52:42,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 808 flow [2023-11-17 11:52:42,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 88 transitions, 742 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-11-17 11:52:42,679 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 536 flow [2023-11-17 11:52:42,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=536, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-11-17 11:52:42,680 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 62 predicate places. [2023-11-17 11:52:42,680 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 536 flow [2023-11-17 11:52:42,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:42,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:42,680 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:42,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 11:52:42,886 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,SelfDestructingSolverStorable12 [2023-11-17 11:52:42,890 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 11:52:42,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1016926181, now seen corresponding path program 5 times [2023-11-17 11:52:42,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:42,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760222488] [2023-11-17 11:52:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:42,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:43,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:43,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760222488] [2023-11-17 11:52:43,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760222488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:43,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54016377] [2023-11-17 11:52:43,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:52:43,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:43,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:43,424 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 11:52:43,443 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 11:52:43,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:52:43,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:43,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 11:52:43,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:43,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:43,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-11-17 11:52:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:43,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:44,080 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:52:44,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 102 [2023-11-17 11:52:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:44,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54016377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:44,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:44,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2023-11-17 11:52:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365913560] [2023-11-17 11:52:44,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:44,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 11:52:44,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 11:52:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-11-17 11:52:44,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:44,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 536 flow. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 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 11:52:44,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:44,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:44,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:44,685 INFO L124 PetriNetUnfolderBase]: 174/333 cut-off events. [2023-11-17 11:52:44,685 INFO L125 PetriNetUnfolderBase]: For 1165/1165 co-relation queries the response was YES. [2023-11-17 11:52:44,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 333 events. 174/333 cut-off events. For 1165/1165 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1183 event pairs, 38 based on Foata normal form. 1/322 useless extension candidates. Maximal degree in co-relation 1440. Up to 251 conditions per place. [2023-11-17 11:52:44,688 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 61 selfloop transitions, 21 changer transitions 1/83 dead transitions. [2023-11-17 11:52:44,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 767 flow [2023-11-17 11:52:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 11:52:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 11:52:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 80 transitions. [2023-11-17 11:52:44,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30303030303030304 [2023-11-17 11:52:44,690 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 80 transitions. [2023-11-17 11:52:44,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 80 transitions. [2023-11-17 11:52:44,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:44,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 80 transitions. [2023-11-17 11:52:44,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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 11:52:44,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:44,691 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:44,691 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 536 flow. Second operand 11 states and 80 transitions. [2023-11-17 11:52:44,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 767 flow [2023-11-17 11:52:44,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 83 transitions, 723 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-11-17 11:52:44,697 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 554 flow [2023-11-17 11:52:44,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=554, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2023-11-17 11:52:44,698 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 63 predicate places. [2023-11-17 11:52:44,698 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 554 flow [2023-11-17 11:52:44,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 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 11:52:44,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:44,698 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:44,708 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 11:52:44,905 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,SelfDestructingSolverStorable13 [2023-11-17 11:52:44,905 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 11:52:44,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2060297163, now seen corresponding path program 6 times [2023-11-17 11:52:44,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:44,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232743968] [2023-11-17 11:52:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:44,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:45,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:45,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232743968] [2023-11-17 11:52:45,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232743968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:45,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683218771] [2023-11-17 11:52:45,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:52:45,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:45,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:45,785 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 11:52:45,806 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 11:52:46,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:52:46,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:46,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-17 11:52:46,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:46,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:52:46,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:52:46,284 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:52:46,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 11:52:46,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:46,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:52:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:46,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:46,841 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (< c_~result_5~0 0)) (.cse0 (forall ((v_ArrVal_725 (Array Int Int))) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_725))) (= (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse12 c_~o_2~0.base) c_~o_2~0.offset))))) (.cse5 (< 0 c_~result_5~0))) (and (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 5) .cse0) (or (= c_~result_5~0 0) (and (forall ((v_ArrVal_725 (Array Int Int))) (not (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_725))) (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse1 c_~o_2~0.base) c_~o_2~0.offset))))) (or (forall ((v_ArrVal_725 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_725))) (< (select (select .cse2 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)))) .cse3) (or (forall ((v_ArrVal_725 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_725))) (<= (+ (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset) 1) (select (select .cse4 c_~o_2~0.base) c_~o_2~0.offset)))) .cse5))) (or .cse3 (forall ((v_ArrVal_725 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_725))) (let ((.cse7 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset)) (.cse6 (select (select .cse8 c_~o_2~0.base) c_~o_2~0.offset))) (or (< .cse6 .cse7) (= .cse7 .cse6)))))) (or (and (forall ((v_ArrVal_725 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_725))) (let ((.cse9 (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset)) (.cse10 (select (select .cse11 c_~o_2~0.base) c_~o_2~0.offset))) (or (< .cse9 .cse10) (= .cse9 .cse10))))) (or .cse3 .cse0)) .cse5))) is different from false [2023-11-17 11:52:46,944 INFO L349 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-11-17 11:52:46,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 725 treesize of output 539 [2023-11-17 11:52:47,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:47,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 509 treesize of output 510 [2023-11-17 11:52:47,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:47,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 501 treesize of output 502 [2023-11-17 11:52:47,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:47,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 493 treesize of output 494 [2023-11-17 11:52:47,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:47,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 485 treesize of output 478 [2023-11-17 11:52:47,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:47,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 469 treesize of output 470 [2023-11-17 11:52:47,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:47,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 461 treesize of output 462 [2023-11-17 11:52:47,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:47,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 453 treesize of output 446 [2023-11-17 11:52:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:48,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683218771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:48,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:48,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 11:52:48,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566206384] [2023-11-17 11:52:48,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:48,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 11:52:48,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 11:52:48,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=810, Unknown=1, NotChecked=58, Total=992 [2023-11-17 11:52:48,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:48,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 554 flow. Second operand has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:48,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:48,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:48,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:49,558 INFO L124 PetriNetUnfolderBase]: 224/424 cut-off events. [2023-11-17 11:52:49,559 INFO L125 PetriNetUnfolderBase]: For 1681/1681 co-relation queries the response was YES. [2023-11-17 11:52:49,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 424 events. 224/424 cut-off events. For 1681/1681 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1631 event pairs, 19 based on Foata normal form. 1/400 useless extension candidates. Maximal degree in co-relation 1860. Up to 132 conditions per place. [2023-11-17 11:52:49,562 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 69 selfloop transitions, 42 changer transitions 2/113 dead transitions. [2023-11-17 11:52:49,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 113 transitions, 1034 flow [2023-11-17 11:52:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 11:52:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 11:52:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 116 transitions. [2023-11-17 11:52:49,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32222222222222224 [2023-11-17 11:52:49,564 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 116 transitions. [2023-11-17 11:52:49,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 116 transitions. [2023-11-17 11:52:49,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:49,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 116 transitions. [2023-11-17 11:52:49,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 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 11:52:49,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 24.0) internal successors, (384), 16 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:49,565 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 24.0) internal successors, (384), 16 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:49,565 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 554 flow. Second operand 15 states and 116 transitions. [2023-11-17 11:52:49,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 113 transitions, 1034 flow [2023-11-17 11:52:49,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 113 transitions, 990 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-17 11:52:49,573 INFO L231 Difference]: Finished difference. Result has 92 places, 81 transitions, 727 flow [2023-11-17 11:52:49,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=727, PETRI_PLACES=92, PETRI_TRANSITIONS=81} [2023-11-17 11:52:49,574 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2023-11-17 11:52:49,574 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 81 transitions, 727 flow [2023-11-17 11:52:49,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:49,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:49,574 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:49,581 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 11:52:49,780 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,SelfDestructingSolverStorable14 [2023-11-17 11:52:49,780 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 11:52:49,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:49,780 INFO L85 PathProgramCache]: Analyzing trace with hash -621918007, now seen corresponding path program 7 times [2023-11-17 11:52:49,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:49,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019993696] [2023-11-17 11:52:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:49,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:50,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:50,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019993696] [2023-11-17 11:52:50,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019993696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:50,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833247461] [2023-11-17 11:52:50,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:52:50,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:50,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:50,395 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 11:52:50,416 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 11:52:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:50,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:52:50,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:50,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:50,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:52:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:50,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:51,048 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 11:52:51,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2023-11-17 11:52:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:51,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833247461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:51,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:51,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2023-11-17 11:52:51,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377820335] [2023-11-17 11:52:51,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:51,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 11:52:51,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 11:52:51,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-11-17 11:52:51,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:51,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 81 transitions, 727 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:51,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:51,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:51,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:51,713 INFO L124 PetriNetUnfolderBase]: 290/543 cut-off events. [2023-11-17 11:52:51,714 INFO L125 PetriNetUnfolderBase]: For 3151/3151 co-relation queries the response was YES. [2023-11-17 11:52:51,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 543 events. 290/543 cut-off events. For 3151/3151 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2298 event pairs, 38 based on Foata normal form. 1/519 useless extension candidates. Maximal degree in co-relation 2709. Up to 225 conditions per place. [2023-11-17 11:52:51,719 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 91 selfloop transitions, 43 changer transitions 8/142 dead transitions. [2023-11-17 11:52:51,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 1486 flow [2023-11-17 11:52:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:52:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:52:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2023-11-17 11:52:51,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3273809523809524 [2023-11-17 11:52:51,721 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 110 transitions. [2023-11-17 11:52:51,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 110 transitions. [2023-11-17 11:52:51,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:51,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 110 transitions. [2023-11-17 11:52:51,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 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 11:52:51,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:51,722 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:51,722 INFO L175 Difference]: Start difference. First operand has 92 places, 81 transitions, 727 flow. Second operand 14 states and 110 transitions. [2023-11-17 11:52:51,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 1486 flow [2023-11-17 11:52:51,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 1375 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-11-17 11:52:51,734 INFO L231 Difference]: Finished difference. Result has 101 places, 94 transitions, 905 flow [2023-11-17 11:52:51,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=905, PETRI_PLACES=101, PETRI_TRANSITIONS=94} [2023-11-17 11:52:51,734 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 79 predicate places. [2023-11-17 11:52:51,734 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 94 transitions, 905 flow [2023-11-17 11:52:51,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:51,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:51,735 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:51,744 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 11:52:51,949 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,SelfDestructingSolverStorable15 [2023-11-17 11:52:51,949 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 11:52:51,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1651623723, now seen corresponding path program 8 times [2023-11-17 11:52:51,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:51,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234376152] [2023-11-17 11:52:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:51,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:52,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:52,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234376152] [2023-11-17 11:52:52,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234376152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:52,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481074559] [2023-11-17 11:52:52,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:52:52,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:52,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:52,551 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 11:52:52,576 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 11:52:52,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:52:52,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:52,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:52:52,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:52,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:52,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:52:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:52,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:53,171 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:52:53,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:52:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:53,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481074559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:53,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:53,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:52:53,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659321888] [2023-11-17 11:52:53,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:53,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 11:52:53,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:53,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 11:52:53,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:52:53,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:53,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 94 transitions, 905 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 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 11:52:53,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:53,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:53,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:53,729 INFO L124 PetriNetUnfolderBase]: 306/572 cut-off events. [2023-11-17 11:52:53,729 INFO L125 PetriNetUnfolderBase]: For 3867/3867 co-relation queries the response was YES. [2023-11-17 11:52:53,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3115 conditions, 572 events. 306/572 cut-off events. For 3867/3867 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2429 event pairs, 88 based on Foata normal form. 1/557 useless extension candidates. Maximal degree in co-relation 3031. Up to 467 conditions per place. [2023-11-17 11:52:53,735 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 89 selfloop transitions, 31 changer transitions 3/123 dead transitions. [2023-11-17 11:52:53,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 123 transitions, 1339 flow [2023-11-17 11:52:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:52:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:52:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 92 transitions. [2023-11-17 11:52:53,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3194444444444444 [2023-11-17 11:52:53,736 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 92 transitions. [2023-11-17 11:52:53,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 92 transitions. [2023-11-17 11:52:53,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:53,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 92 transitions. [2023-11-17 11:52:53,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:53,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:53,738 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:53,738 INFO L175 Difference]: Start difference. First operand has 101 places, 94 transitions, 905 flow. Second operand 12 states and 92 transitions. [2023-11-17 11:52:53,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 123 transitions, 1339 flow [2023-11-17 11:52:53,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 123 transitions, 1166 flow, removed 58 selfloop flow, removed 8 redundant places. [2023-11-17 11:52:53,753 INFO L231 Difference]: Finished difference. Result has 107 places, 104 transitions, 944 flow [2023-11-17 11:52:53,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=944, PETRI_PLACES=107, PETRI_TRANSITIONS=104} [2023-11-17 11:52:53,753 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 85 predicate places. [2023-11-17 11:52:53,753 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 104 transitions, 944 flow [2023-11-17 11:52:53,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 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 11:52:53,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:53,754 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:53,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 11:52:53,968 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,SelfDestructingSolverStorable16 [2023-11-17 11:52:53,968 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 11:52:53,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:53,969 INFO L85 PathProgramCache]: Analyzing trace with hash 712673323, now seen corresponding path program 9 times [2023-11-17 11:52:53,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:53,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112464920] [2023-11-17 11:52:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:53,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:54,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112464920] [2023-11-17 11:52:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112464920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308965408] [2023-11-17 11:52:54,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:52:54,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:54,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:54,585 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 11:52:54,604 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 11:52:54,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:52:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:54,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:52:54,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:54,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:54,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:52:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:54,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:55,127 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:52:55,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:52:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:55,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308965408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:55,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:55,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:52:55,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914390239] [2023-11-17 11:52:55,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:55,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 11:52:55,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:55,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 11:52:55,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:52:55,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:55,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 104 transitions, 944 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:55,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:55,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:55,664 INFO L124 PetriNetUnfolderBase]: 315/592 cut-off events. [2023-11-17 11:52:55,664 INFO L125 PetriNetUnfolderBase]: For 3062/3062 co-relation queries the response was YES. [2023-11-17 11:52:55,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3002 conditions, 592 events. 315/592 cut-off events. For 3062/3062 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2556 event pairs, 86 based on Foata normal form. 1/577 useless extension candidates. Maximal degree in co-relation 2917. Up to 485 conditions per place. [2023-11-17 11:52:55,670 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 94 selfloop transitions, 32 changer transitions 1/127 dead transitions. [2023-11-17 11:52:55,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 127 transitions, 1364 flow [2023-11-17 11:52:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:52:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:52:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 87 transitions. [2023-11-17 11:52:55,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020833333333333 [2023-11-17 11:52:55,671 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 87 transitions. [2023-11-17 11:52:55,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 87 transitions. [2023-11-17 11:52:55,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:55,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 87 transitions. [2023-11-17 11:52:55,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 7.25) internal successors, (87), 12 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 11:52:55,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,673 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,673 INFO L175 Difference]: Start difference. First operand has 107 places, 104 transitions, 944 flow. Second operand 12 states and 87 transitions. [2023-11-17 11:52:55,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 127 transitions, 1364 flow [2023-11-17 11:52:55,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 127 transitions, 1295 flow, removed 29 selfloop flow, removed 5 redundant places. [2023-11-17 11:52:55,687 INFO L231 Difference]: Finished difference. Result has 116 places, 111 transitions, 1063 flow [2023-11-17 11:52:55,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1063, PETRI_PLACES=116, PETRI_TRANSITIONS=111} [2023-11-17 11:52:55,687 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 94 predicate places. [2023-11-17 11:52:55,687 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 111 transitions, 1063 flow [2023-11-17 11:52:55,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:55,688 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:55,694 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 11:52:55,893 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,SelfDestructingSolverStorable17 [2023-11-17 11:52:55,894 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 11:52:55,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1572142499, now seen corresponding path program 10 times [2023-11-17 11:52:55,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:55,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348231686] [2023-11-17 11:52:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:55,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:56,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:56,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348231686] [2023-11-17 11:52:56,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348231686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:56,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967408567] [2023-11-17 11:52:56,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:52:56,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:56,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:56,393 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 11:52:56,417 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 11:52:56,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:52:56,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:56,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:52:56,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:56,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:56,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:52:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:56,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:56,909 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:52:56,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:52:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:56,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967408567] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:56,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:56,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2023-11-17 11:52:56,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117008073] [2023-11-17 11:52:56,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:56,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:52:56,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:56,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:52:56,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:52:56,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:56,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 111 transitions, 1063 flow. Second operand has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 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 11:52:56,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:56,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:56,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:57,349 INFO L124 PetriNetUnfolderBase]: 314/596 cut-off events. [2023-11-17 11:52:57,349 INFO L125 PetriNetUnfolderBase]: For 3604/3604 co-relation queries the response was YES. [2023-11-17 11:52:57,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3156 conditions, 596 events. 314/596 cut-off events. For 3604/3604 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2615 event pairs, 88 based on Foata normal form. 1/581 useless extension candidates. Maximal degree in co-relation 3068. Up to 476 conditions per place. [2023-11-17 11:52:57,355 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 95 selfloop transitions, 30 changer transitions 3/128 dead transitions. [2023-11-17 11:52:57,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 128 transitions, 1429 flow [2023-11-17 11:52:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 11:52:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 11:52:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 81 transitions. [2023-11-17 11:52:57,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3068181818181818 [2023-11-17 11:52:57,357 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 81 transitions. [2023-11-17 11:52:57,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 81 transitions. [2023-11-17 11:52:57,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:57,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 81 transitions. [2023-11-17 11:52:57,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:57,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:57,358 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:57,358 INFO L175 Difference]: Start difference. First operand has 116 places, 111 transitions, 1063 flow. Second operand 11 states and 81 transitions. [2023-11-17 11:52:57,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 128 transitions, 1429 flow [2023-11-17 11:52:57,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 128 transitions, 1332 flow, removed 33 selfloop flow, removed 7 redundant places. [2023-11-17 11:52:57,389 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 1047 flow [2023-11-17 11:52:57,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1047, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2023-11-17 11:52:57,404 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 98 predicate places. [2023-11-17 11:52:57,405 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 1047 flow [2023-11-17 11:52:57,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 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 11:52:57,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:57,405 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:57,419 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 11:52:57,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:57,611 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 11:52:57,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1076894353, now seen corresponding path program 11 times [2023-11-17 11:52:57,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:57,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303814818] [2023-11-17 11:52:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:58,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:58,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303814818] [2023-11-17 11:52:58,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303814818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:58,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108373080] [2023-11-17 11:52:58,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:52:58,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:58,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:58,209 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 11:52:58,216 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 11:52:58,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:52:58,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:58,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 11:52:58,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:58,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:58,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-11-17 11:52:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:58,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:58,915 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:52:58,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:52:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:52:59,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108373080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:59,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:59,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2023-11-17 11:52:59,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63200825] [2023-11-17 11:52:59,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:59,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 11:52:59,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 11:52:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2023-11-17 11:52:59,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:52:59,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 1047 flow. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:59,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:52:59,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:59,606 INFO L124 PetriNetUnfolderBase]: 310/591 cut-off events. [2023-11-17 11:52:59,606 INFO L125 PetriNetUnfolderBase]: For 3594/3594 co-relation queries the response was YES. [2023-11-17 11:52:59,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3096 conditions, 591 events. 310/591 cut-off events. For 3594/3594 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2616 event pairs, 80 based on Foata normal form. 1/576 useless extension candidates. Maximal degree in co-relation 3007. Up to 471 conditions per place. [2023-11-17 11:52:59,612 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 96 selfloop transitions, 31 changer transitions 5/132 dead transitions. [2023-11-17 11:52:59,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 132 transitions, 1410 flow [2023-11-17 11:52:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 11:52:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 11:52:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 95 transitions. [2023-11-17 11:52:59,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30448717948717946 [2023-11-17 11:52:59,613 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 95 transitions. [2023-11-17 11:52:59,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 95 transitions. [2023-11-17 11:52:59,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:59,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 95 transitions. [2023-11-17 11:52:59,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 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 11:52:59,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,615 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,615 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 1047 flow. Second operand 13 states and 95 transitions. [2023-11-17 11:52:59,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 132 transitions, 1410 flow [2023-11-17 11:52:59,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 132 transitions, 1345 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-11-17 11:52:59,635 INFO L231 Difference]: Finished difference. Result has 125 places, 111 transitions, 1062 flow [2023-11-17 11:52:59,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1062, PETRI_PLACES=125, PETRI_TRANSITIONS=111} [2023-11-17 11:52:59,636 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 103 predicate places. [2023-11-17 11:52:59,636 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 111 transitions, 1062 flow [2023-11-17 11:52:59,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:59,643 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:59,649 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 11:52:59,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:59,849 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 11:52:59,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash -60515500, now seen corresponding path program 12 times [2023-11-17 11:52:59,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:59,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830444364] [2023-11-17 11:52:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:00,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:00,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830444364] [2023-11-17 11:53:00,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830444364] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:00,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435060626] [2023-11-17 11:53:00,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:53:00,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:00,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:00,533 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 11:53:00,559 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 11:53:00,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:53:00,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:00,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:00,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:00,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:01,014 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 11:53:01,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 11:53:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:01,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435060626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:01,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:01,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 11:53:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412263424] [2023-11-17 11:53:01,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:01,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:53:01,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:53:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:53:01,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:01,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 111 transitions, 1062 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:01,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:01,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:01,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:01,457 INFO L124 PetriNetUnfolderBase]: 371/701 cut-off events. [2023-11-17 11:53:01,457 INFO L125 PetriNetUnfolderBase]: For 4686/4686 co-relation queries the response was YES. [2023-11-17 11:53:01,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3707 conditions, 701 events. 371/701 cut-off events. For 4686/4686 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3263 event pairs, 74 based on Foata normal form. 6/674 useless extension candidates. Maximal degree in co-relation 3616. Up to 245 conditions per place. [2023-11-17 11:53:01,465 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 114 selfloop transitions, 38 changer transitions 0/152 dead transitions. [2023-11-17 11:53:01,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 152 transitions, 1668 flow [2023-11-17 11:53:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:53:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:53:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2023-11-17 11:53:01,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2023-11-17 11:53:01,466 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 94 transitions. [2023-11-17 11:53:01,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 94 transitions. [2023-11-17 11:53:01,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:01,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 94 transitions. [2023-11-17 11:53:01,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:01,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:01,472 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:01,472 INFO L175 Difference]: Start difference. First operand has 125 places, 111 transitions, 1062 flow. Second operand 10 states and 94 transitions. [2023-11-17 11:53:01,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 152 transitions, 1668 flow [2023-11-17 11:53:01,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 152 transitions, 1581 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-11-17 11:53:01,494 INFO L231 Difference]: Finished difference. Result has 124 places, 115 transitions, 1143 flow [2023-11-17 11:53:01,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1143, PETRI_PLACES=124, PETRI_TRANSITIONS=115} [2023-11-17 11:53:01,495 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 102 predicate places. [2023-11-17 11:53:01,495 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 115 transitions, 1143 flow [2023-11-17 11:53:01,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:01,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:01,495 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:01,509 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 11:53:01,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:01,706 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 11:53:01,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1274364003, now seen corresponding path program 13 times [2023-11-17 11:53:01,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:01,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411510407] [2023-11-17 11:53:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:01,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:02,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:02,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411510407] [2023-11-17 11:53:02,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411510407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:02,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722733458] [2023-11-17 11:53:02,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:53:02,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:02,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:02,370 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 11:53:02,376 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 11:53:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:02,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:53:02,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:02,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:02,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:53:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:02,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:02,892 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-11-17 11:53:02,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-11-17 11:53:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:02,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722733458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:02,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:02,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2023-11-17 11:53:02,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088320464] [2023-11-17 11:53:02,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:02,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 11:53:02,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 11:53:02,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-11-17 11:53:02,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:02,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 115 transitions, 1143 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:02,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:02,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:02,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:03,378 INFO L124 PetriNetUnfolderBase]: 383/727 cut-off events. [2023-11-17 11:53:03,378 INFO L125 PetriNetUnfolderBase]: For 5469/5469 co-relation queries the response was YES. [2023-11-17 11:53:03,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3928 conditions, 727 events. 383/727 cut-off events. For 5469/5469 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3424 event pairs, 110 based on Foata normal form. 4/698 useless extension candidates. Maximal degree in co-relation 3835. Up to 391 conditions per place. [2023-11-17 11:53:03,384 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 104 selfloop transitions, 38 changer transitions 1/143 dead transitions. [2023-11-17 11:53:03,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 143 transitions, 1643 flow [2023-11-17 11:53:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:53:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:53:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2023-11-17 11:53:03,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2023-11-17 11:53:03,385 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 85 transitions. [2023-11-17 11:53:03,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 85 transitions. [2023-11-17 11:53:03,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:03,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 85 transitions. [2023-11-17 11:53:03,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:03,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:03,386 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:03,386 INFO L175 Difference]: Start difference. First operand has 124 places, 115 transitions, 1143 flow. Second operand 9 states and 85 transitions. [2023-11-17 11:53:03,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 143 transitions, 1643 flow [2023-11-17 11:53:03,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 143 transitions, 1563 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-17 11:53:03,408 INFO L231 Difference]: Finished difference. Result has 127 places, 116 transitions, 1168 flow [2023-11-17 11:53:03,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1168, PETRI_PLACES=127, PETRI_TRANSITIONS=116} [2023-11-17 11:53:03,408 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 105 predicate places. [2023-11-17 11:53:03,408 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 116 transitions, 1168 flow [2023-11-17 11:53:03,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:03,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:03,409 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:03,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:03,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:03,615 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 11:53:03,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:03,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1707352218, now seen corresponding path program 14 times [2023-11-17 11:53:03,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:03,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54044519] [2023-11-17 11:53:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:03,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:04,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:04,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54044519] [2023-11-17 11:53:04,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54044519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901383653] [2023-11-17 11:53:04,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:53:04,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:04,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:04,188 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 11:53:04,211 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 11:53:04,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:53:04,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:04,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:04,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:04,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:04,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:53:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:04,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:04,705 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 11:53:04,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 11:53:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:04,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901383653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:04,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:04,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-17 11:53:04,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892764347] [2023-11-17 11:53:04,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:04,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 11:53:04,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:04,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 11:53:04,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:53:04,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:04,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 116 transitions, 1168 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 11:53:04,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:04,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:04,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:05,444 INFO L124 PetriNetUnfolderBase]: 425/809 cut-off events. [2023-11-17 11:53:05,444 INFO L125 PetriNetUnfolderBase]: For 6333/6333 co-relation queries the response was YES. [2023-11-17 11:53:05,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4348 conditions, 809 events. 425/809 cut-off events. For 6333/6333 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3966 event pairs, 90 based on Foata normal form. 6/770 useless extension candidates. Maximal degree in co-relation 4255. Up to 243 conditions per place. [2023-11-17 11:53:05,451 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 132 selfloop transitions, 52 changer transitions 4/188 dead transitions. [2023-11-17 11:53:05,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 188 transitions, 2017 flow [2023-11-17 11:53:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 11:53:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 11:53:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 149 transitions. [2023-11-17 11:53:05,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880208333333333 [2023-11-17 11:53:05,453 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 149 transitions. [2023-11-17 11:53:05,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 149 transitions. [2023-11-17 11:53:05,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:05,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 149 transitions. [2023-11-17 11:53:05,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.3125) internal successors, (149), 16 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:05,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 24.0) internal successors, (408), 17 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:05,454 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 24.0) internal successors, (408), 17 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:05,454 INFO L175 Difference]: Start difference. First operand has 127 places, 116 transitions, 1168 flow. Second operand 16 states and 149 transitions. [2023-11-17 11:53:05,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 188 transitions, 2017 flow [2023-11-17 11:53:05,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 188 transitions, 1954 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-17 11:53:05,477 INFO L231 Difference]: Finished difference. Result has 141 places, 125 transitions, 1358 flow [2023-11-17 11:53:05,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1358, PETRI_PLACES=141, PETRI_TRANSITIONS=125} [2023-11-17 11:53:05,478 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 119 predicate places. [2023-11-17 11:53:05,478 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 125 transitions, 1358 flow [2023-11-17 11:53:05,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 11:53:05,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:05,478 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:05,488 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 11:53:05,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:05,688 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 11:53:05,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash 516855974, now seen corresponding path program 15 times [2023-11-17 11:53:05,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:05,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159355007] [2023-11-17 11:53:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:05,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:06,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:06,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159355007] [2023-11-17 11:53:06,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159355007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:06,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349192663] [2023-11-17 11:53:06,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:53:06,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:06,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:06,395 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 11:53:06,418 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 11:53:06,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:53:06,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:06,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:06,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:06,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:06,859 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 11:53:06,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 11:53:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:06,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349192663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:06,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:06,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:53:06,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440236901] [2023-11-17 11:53:06,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:06,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:53:06,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:53:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:53:06,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:06,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 125 transitions, 1358 flow. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:06,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:06,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:06,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:07,330 INFO L124 PetriNetUnfolderBase]: 449/849 cut-off events. [2023-11-17 11:53:07,330 INFO L125 PetriNetUnfolderBase]: For 7771/7771 co-relation queries the response was YES. [2023-11-17 11:53:07,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4896 conditions, 849 events. 449/849 cut-off events. For 7771/7771 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4203 event pairs, 92 based on Foata normal form. 6/855 useless extension candidates. Maximal degree in co-relation 4797. Up to 264 conditions per place. [2023-11-17 11:53:07,340 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 123 selfloop transitions, 48 changer transitions 0/171 dead transitions. [2023-11-17 11:53:07,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 171 transitions, 2048 flow [2023-11-17 11:53:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:53:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:53:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 109 transitions. [2023-11-17 11:53:07,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784722222222222 [2023-11-17 11:53:07,342 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 109 transitions. [2023-11-17 11:53:07,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 109 transitions. [2023-11-17 11:53:07,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:07,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 109 transitions. [2023-11-17 11:53:07,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:07,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:07,345 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:07,345 INFO L175 Difference]: Start difference. First operand has 141 places, 125 transitions, 1358 flow. Second operand 12 states and 109 transitions. [2023-11-17 11:53:07,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 171 transitions, 2048 flow [2023-11-17 11:53:07,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 171 transitions, 1890 flow, removed 38 selfloop flow, removed 9 redundant places. [2023-11-17 11:53:07,373 INFO L231 Difference]: Finished difference. Result has 144 places, 128 transitions, 1359 flow [2023-11-17 11:53:07,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1359, PETRI_PLACES=144, PETRI_TRANSITIONS=128} [2023-11-17 11:53:07,374 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2023-11-17 11:53:07,374 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 128 transitions, 1359 flow [2023-11-17 11:53:07,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:07,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:07,374 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:07,381 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 11:53:07,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:07,581 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 11:53:07,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:07,582 INFO L85 PathProgramCache]: Analyzing trace with hash -422094426, now seen corresponding path program 16 times [2023-11-17 11:53:07,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:07,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917839923] [2023-11-17 11:53:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:07,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:08,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:08,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917839923] [2023-11-17 11:53:08,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917839923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:08,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642618380] [2023-11-17 11:53:08,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:53:08,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:08,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:08,224 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 11:53:08,248 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 11:53:08,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:53:08,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:08,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:53:08,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:08,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:08,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:53:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:08,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:08,729 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 11:53:08,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 11:53:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:08,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642618380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:08,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:08,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-17 11:53:08,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205644837] [2023-11-17 11:53:08,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:08,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 11:53:08,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:08,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 11:53:08,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:53:08,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:08,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 128 transitions, 1359 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:08,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:08,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:08,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:09,280 INFO L124 PetriNetUnfolderBase]: 445/837 cut-off events. [2023-11-17 11:53:09,281 INFO L125 PetriNetUnfolderBase]: For 6828/6828 co-relation queries the response was YES. [2023-11-17 11:53:09,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4719 conditions, 837 events. 445/837 cut-off events. For 6828/6828 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4106 event pairs, 82 based on Foata normal form. 2/839 useless extension candidates. Maximal degree in co-relation 4619. Up to 243 conditions per place. [2023-11-17 11:53:09,289 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 116 selfloop transitions, 51 changer transitions 6/173 dead transitions. [2023-11-17 11:53:09,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 173 transitions, 2010 flow [2023-11-17 11:53:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 11:53:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 11:53:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2023-11-17 11:53:09,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782051282051282 [2023-11-17 11:53:09,290 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 118 transitions. [2023-11-17 11:53:09,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 118 transitions. [2023-11-17 11:53:09,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:09,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 118 transitions. [2023-11-17 11:53:09,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 9.076923076923077) internal successors, (118), 13 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 11:53:09,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:09,292 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:09,292 INFO L175 Difference]: Start difference. First operand has 144 places, 128 transitions, 1359 flow. Second operand 13 states and 118 transitions. [2023-11-17 11:53:09,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 173 transitions, 2010 flow [2023-11-17 11:53:09,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 173 transitions, 1922 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-17 11:53:09,323 INFO L231 Difference]: Finished difference. Result has 146 places, 126 transitions, 1355 flow [2023-11-17 11:53:09,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1355, PETRI_PLACES=146, PETRI_TRANSITIONS=126} [2023-11-17 11:53:09,323 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2023-11-17 11:53:09,323 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 126 transitions, 1355 flow [2023-11-17 11:53:09,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:09,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:09,324 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:09,336 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 11:53:09,530 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,SelfDestructingSolverStorable24 [2023-11-17 11:53:09,532 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 11:53:09,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1302854233, now seen corresponding path program 17 times [2023-11-17 11:53:09,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:09,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91253004] [2023-11-17 11:53:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:09,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:10,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:10,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91253004] [2023-11-17 11:53:10,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91253004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:10,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322473774] [2023-11-17 11:53:10,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:53:10,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:10,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:10,291 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 11:53:10,292 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 11:53:10,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:53:10,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:10,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:53:10,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:10,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:10,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:53:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:10,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:10,800 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-11-17 11:53:10,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-11-17 11:53:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:10,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322473774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:10,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:10,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 11:53:10,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143994209] [2023-11-17 11:53:10,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:10,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:53:10,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:53:10,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:53:10,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:10,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 126 transitions, 1355 flow. Second operand has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 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 11:53:10,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:10,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:10,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:11,280 INFO L124 PetriNetUnfolderBase]: 429/804 cut-off events. [2023-11-17 11:53:11,280 INFO L125 PetriNetUnfolderBase]: For 7081/7081 co-relation queries the response was YES. [2023-11-17 11:53:11,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4593 conditions, 804 events. 429/804 cut-off events. For 7081/7081 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3877 event pairs, 129 based on Foata normal form. 4/808 useless extension candidates. Maximal degree in co-relation 4509. Up to 501 conditions per place. [2023-11-17 11:53:11,288 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 106 selfloop transitions, 37 changer transitions 4/147 dead transitions. [2023-11-17 11:53:11,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 147 transitions, 1791 flow [2023-11-17 11:53:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:53:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:53:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 83 transitions. [2023-11-17 11:53:11,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3458333333333333 [2023-11-17 11:53:11,289 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 83 transitions. [2023-11-17 11:53:11,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 83 transitions. [2023-11-17 11:53:11,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:11,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 83 transitions. [2023-11-17 11:53:11,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:11,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:11,290 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:11,290 INFO L175 Difference]: Start difference. First operand has 146 places, 126 transitions, 1355 flow. Second operand 10 states and 83 transitions. [2023-11-17 11:53:11,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 147 transitions, 1791 flow [2023-11-17 11:53:11,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 147 transitions, 1682 flow, removed 3 selfloop flow, removed 12 redundant places. [2023-11-17 11:53:11,317 INFO L231 Difference]: Finished difference. Result has 141 places, 124 transitions, 1295 flow [2023-11-17 11:53:11,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1295, PETRI_PLACES=141, PETRI_TRANSITIONS=124} [2023-11-17 11:53:11,318 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 119 predicate places. [2023-11-17 11:53:11,318 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 124 transitions, 1295 flow [2023-11-17 11:53:11,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 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 11:53:11,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:11,318 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:11,329 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 11:53:11,524 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,SelfDestructingSolverStorable25 [2023-11-17 11:53:11,525 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 11:53:11,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:11,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1835189509, now seen corresponding path program 18 times [2023-11-17 11:53:11,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:11,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438593819] [2023-11-17 11:53:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:11,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:12,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:12,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438593819] [2023-11-17 11:53:12,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438593819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:12,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103891527] [2023-11-17 11:53:12,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:53:12,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:12,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:12,072 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 11:53:12,092 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 11:53:12,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:53:12,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:12,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:12,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:12,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:12,531 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:12,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:53:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:12,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103891527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:12,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 11:53:12,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525070715] [2023-11-17 11:53:12,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:12,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:53:12,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:53:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:53:12,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:12,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 124 transitions, 1295 flow. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 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 11:53:12,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:12,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:12,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:12,958 INFO L124 PetriNetUnfolderBase]: 434/809 cut-off events. [2023-11-17 11:53:12,959 INFO L125 PetriNetUnfolderBase]: For 7136/7136 co-relation queries the response was YES. [2023-11-17 11:53:12,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4576 conditions, 809 events. 434/809 cut-off events. For 7136/7136 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3875 event pairs, 168 based on Foata normal form. 4/813 useless extension candidates. Maximal degree in co-relation 4510. Up to 730 conditions per place. [2023-11-17 11:53:12,965 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 118 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2023-11-17 11:53:12,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 139 transitions, 1712 flow [2023-11-17 11:53:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:53:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:53:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2023-11-17 11:53:12,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3194444444444444 [2023-11-17 11:53:12,967 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 69 transitions. [2023-11-17 11:53:12,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 69 transitions. [2023-11-17 11:53:12,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:12,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 69 transitions. [2023-11-17 11:53:12,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:12,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:12,968 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:12,968 INFO L175 Difference]: Start difference. First operand has 141 places, 124 transitions, 1295 flow. Second operand 9 states and 69 transitions. [2023-11-17 11:53:12,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 139 transitions, 1712 flow [2023-11-17 11:53:12,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 139 transitions, 1634 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-17 11:53:12,987 INFO L231 Difference]: Finished difference. Result has 139 places, 125 transitions, 1291 flow [2023-11-17 11:53:12,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1291, PETRI_PLACES=139, PETRI_TRANSITIONS=125} [2023-11-17 11:53:12,988 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2023-11-17 11:53:12,988 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 125 transitions, 1291 flow [2023-11-17 11:53:12,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 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 11:53:12,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:12,988 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:12,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-17 11:53:13,190 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,SelfDestructingSolverStorable26 [2023-11-17 11:53:13,191 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 11:53:13,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash -797252573, now seen corresponding path program 19 times [2023-11-17 11:53:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:13,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620949533] [2023-11-17 11:53:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:13,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:13,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620949533] [2023-11-17 11:53:13,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620949533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:13,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517231500] [2023-11-17 11:53:13,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:53:13,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:13,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:13,743 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 11:53:13,761 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 11:53:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:13,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 11:53:13,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:14,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:14,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:53:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:14,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:14,437 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:14,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:53:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:14,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517231500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:14,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:14,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-11-17 11:53:14,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023438606] [2023-11-17 11:53:14,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:14,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 11:53:14,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:14,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 11:53:14,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-17 11:53:14,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:14,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 125 transitions, 1291 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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 11:53:14,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:14,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:14,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:15,406 INFO L124 PetriNetUnfolderBase]: 486/929 cut-off events. [2023-11-17 11:53:15,406 INFO L125 PetriNetUnfolderBase]: For 9140/9140 co-relation queries the response was YES. [2023-11-17 11:53:15,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5260 conditions, 929 events. 486/929 cut-off events. For 9140/9140 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4741 event pairs, 98 based on Foata normal form. 10/939 useless extension candidates. Maximal degree in co-relation 5161. Up to 713 conditions per place. [2023-11-17 11:53:15,412 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 145 selfloop transitions, 45 changer transitions 11/201 dead transitions. [2023-11-17 11:53:15,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 201 transitions, 2276 flow [2023-11-17 11:53:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 11:53:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 11:53:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 183 transitions. [2023-11-17 11:53:15,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2023-11-17 11:53:15,414 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 183 transitions. [2023-11-17 11:53:15,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 183 transitions. [2023-11-17 11:53:15,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:15,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 183 transitions. [2023-11-17 11:53:15,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 8.318181818181818) internal successors, (183), 22 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:15,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:15,415 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:15,415 INFO L175 Difference]: Start difference. First operand has 139 places, 125 transitions, 1291 flow. Second operand 22 states and 183 transitions. [2023-11-17 11:53:15,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 201 transitions, 2276 flow [2023-11-17 11:53:15,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 201 transitions, 2202 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-17 11:53:15,439 INFO L231 Difference]: Finished difference. Result has 163 places, 142 transitions, 1641 flow [2023-11-17 11:53:15,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1641, PETRI_PLACES=163, PETRI_TRANSITIONS=142} [2023-11-17 11:53:15,440 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2023-11-17 11:53:15,440 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 142 transitions, 1641 flow [2023-11-17 11:53:15,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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 11:53:15,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:15,440 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:15,446 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 11:53:15,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:15,645 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 11:53:15,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:15,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1943683523, now seen corresponding path program 20 times [2023-11-17 11:53:15,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:15,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410425144] [2023-11-17 11:53:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:15,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:16,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:16,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410425144] [2023-11-17 11:53:16,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410425144] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:16,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126015805] [2023-11-17 11:53:16,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:53:16,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:16,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:16,238 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 11:53:16,240 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 11:53:16,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:53:16,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:16,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:16,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:16,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:16,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:53:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:16,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:16,673 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:16,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:53:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:16,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126015805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:16,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:16,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:53:16,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330924961] [2023-11-17 11:53:16,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:16,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:53:16,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:53:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:53:16,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:16,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 142 transitions, 1641 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:53:16,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:16,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:16,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:17,140 INFO L124 PetriNetUnfolderBase]: 497/949 cut-off events. [2023-11-17 11:53:17,140 INFO L125 PetriNetUnfolderBase]: For 12379/12379 co-relation queries the response was YES. [2023-11-17 11:53:17,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5973 conditions, 949 events. 497/949 cut-off events. For 12379/12379 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4903 event pairs, 197 based on Foata normal form. 4/953 useless extension candidates. Maximal degree in co-relation 5864. Up to 828 conditions per place. [2023-11-17 11:53:17,149 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 135 selfloop transitions, 26 changer transitions 1/162 dead transitions. [2023-11-17 11:53:17,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 162 transitions, 2148 flow [2023-11-17 11:53:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:53:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:53:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 76 transitions. [2023-11-17 11:53:17,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2023-11-17 11:53:17,150 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 76 transitions. [2023-11-17 11:53:17,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 76 transitions. [2023-11-17 11:53:17,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:17,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 76 transitions. [2023-11-17 11:53:17,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:17,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:17,152 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:17,152 INFO L175 Difference]: Start difference. First operand has 163 places, 142 transitions, 1641 flow. Second operand 9 states and 76 transitions. [2023-11-17 11:53:17,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 162 transitions, 2148 flow [2023-11-17 11:53:17,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 162 transitions, 1957 flow, removed 78 selfloop flow, removed 9 redundant places. [2023-11-17 11:53:17,199 INFO L231 Difference]: Finished difference. Result has 162 places, 143 transitions, 1539 flow [2023-11-17 11:53:17,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1539, PETRI_PLACES=162, PETRI_TRANSITIONS=143} [2023-11-17 11:53:17,201 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 140 predicate places. [2023-11-17 11:53:17,201 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 143 transitions, 1539 flow [2023-11-17 11:53:17,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:53:17,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:17,201 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:17,213 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 11:53:17,408 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,SelfDestructingSolverStorable28 [2023-11-17 11:53:17,408 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 11:53:17,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:17,408 INFO L85 PathProgramCache]: Analyzing trace with hash -613260630, now seen corresponding path program 21 times [2023-11-17 11:53:17,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:17,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522827839] [2023-11-17 11:53:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:17,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:17,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:17,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522827839] [2023-11-17 11:53:17,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522827839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:17,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599166164] [2023-11-17 11:53:17,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:53:17,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:17,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:17,950 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 11:53:17,970 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 11:53:18,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:53:18,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:18,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:18,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:18,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:18,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:53:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:18,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:18,387 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:18,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:53:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:18,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599166164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:18,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:18,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:53:18,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032218670] [2023-11-17 11:53:18,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:18,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:53:18,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:18,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:53:18,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:53:18,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:18,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 143 transitions, 1539 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:18,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:18,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:18,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:19,036 INFO L124 PetriNetUnfolderBase]: 523/1003 cut-off events. [2023-11-17 11:53:19,037 INFO L125 PetriNetUnfolderBase]: For 13072/13072 co-relation queries the response was YES. [2023-11-17 11:53:19,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6189 conditions, 1003 events. 523/1003 cut-off events. For 13072/13072 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5292 event pairs, 209 based on Foata normal form. 6/1009 useless extension candidates. Maximal degree in co-relation 6080. Up to 848 conditions per place. [2023-11-17 11:53:19,045 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 156 selfloop transitions, 33 changer transitions 4/193 dead transitions. [2023-11-17 11:53:19,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 193 transitions, 2320 flow [2023-11-17 11:53:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:53:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:53:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 121 transitions. [2023-11-17 11:53:19,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2023-11-17 11:53:19,046 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 121 transitions. [2023-11-17 11:53:19,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 121 transitions. [2023-11-17 11:53:19,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:19,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 121 transitions. [2023-11-17 11:53:19,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.642857142857142) internal successors, (121), 14 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 11:53:19,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:19,048 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:19,048 INFO L175 Difference]: Start difference. First operand has 162 places, 143 transitions, 1539 flow. Second operand 14 states and 121 transitions. [2023-11-17 11:53:19,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 193 transitions, 2320 flow [2023-11-17 11:53:19,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 193 transitions, 2257 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-17 11:53:19,102 INFO L231 Difference]: Finished difference. Result has 173 places, 151 transitions, 1729 flow [2023-11-17 11:53:19,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1729, PETRI_PLACES=173, PETRI_TRANSITIONS=151} [2023-11-17 11:53:19,104 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 151 predicate places. [2023-11-17 11:53:19,104 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 151 transitions, 1729 flow [2023-11-17 11:53:19,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:19,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:19,104 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:19,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:19,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:19,310 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 11:53:19,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1253311974, now seen corresponding path program 22 times [2023-11-17 11:53:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:19,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015152797] [2023-11-17 11:53:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:19,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:19,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:19,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015152797] [2023-11-17 11:53:19,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015152797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:19,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054343382] [2023-11-17 11:53:19,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:53:19,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:19,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:19,832 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 11:53:19,854 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 11:53:20,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:53:20,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:20,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:53:20,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:20,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:20,289 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:20,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:53:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:20,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054343382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:20,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:20,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 11:53:20,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283696454] [2023-11-17 11:53:20,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:20,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:53:20,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:20,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:53:20,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:53:20,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:20,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 151 transitions, 1729 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 11:53:20,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:20,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:20,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:20,730 INFO L124 PetriNetUnfolderBase]: 519/991 cut-off events. [2023-11-17 11:53:20,730 INFO L125 PetriNetUnfolderBase]: For 13961/13961 co-relation queries the response was YES. [2023-11-17 11:53:20,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6367 conditions, 991 events. 519/991 cut-off events. For 13961/13961 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5191 event pairs, 222 based on Foata normal form. 2/993 useless extension candidates. Maximal degree in co-relation 6253. Up to 913 conditions per place. [2023-11-17 11:53:20,738 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 136 selfloop transitions, 20 changer transitions 8/164 dead transitions. [2023-11-17 11:53:20,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 164 transitions, 2144 flow [2023-11-17 11:53:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:53:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:53:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2023-11-17 11:53:20,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3148148148148148 [2023-11-17 11:53:20,741 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 68 transitions. [2023-11-17 11:53:20,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 68 transitions. [2023-11-17 11:53:20,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:20,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 68 transitions. [2023-11-17 11:53:20,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:20,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:20,742 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:20,743 INFO L175 Difference]: Start difference. First operand has 173 places, 151 transitions, 1729 flow. Second operand 9 states and 68 transitions. [2023-11-17 11:53:20,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 164 transitions, 2144 flow [2023-11-17 11:53:20,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 164 transitions, 1999 flow, removed 57 selfloop flow, removed 6 redundant places. [2023-11-17 11:53:20,802 INFO L231 Difference]: Finished difference. Result has 176 places, 149 transitions, 1610 flow [2023-11-17 11:53:20,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1610, PETRI_PLACES=176, PETRI_TRANSITIONS=149} [2023-11-17 11:53:20,802 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 154 predicate places. [2023-11-17 11:53:20,802 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 149 transitions, 1610 flow [2023-11-17 11:53:20,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 11:53:20,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:20,803 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:20,809 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 11:53:21,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-17 11:53:21,009 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 11:53:21,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:21,009 INFO L85 PathProgramCache]: Analyzing trace with hash -254044762, now seen corresponding path program 23 times [2023-11-17 11:53:21,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:21,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985207681] [2023-11-17 11:53:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:21,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:21,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:21,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985207681] [2023-11-17 11:53:21,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985207681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:21,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20850314] [2023-11-17 11:53:21,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:53:21,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:21,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:21,529 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 11:53:21,553 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 11:53:21,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:53:21,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:21,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:21,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:21,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:21,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:53:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:21,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:22,055 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:22,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:53:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:22,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20850314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:22,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:22,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:53:22,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430603622] [2023-11-17 11:53:22,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:22,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:53:22,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:22,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:53:22,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:53:22,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:22,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 149 transitions, 1610 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:22,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:22,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:22,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:22,672 INFO L124 PetriNetUnfolderBase]: 510/965 cut-off events. [2023-11-17 11:53:22,673 INFO L125 PetriNetUnfolderBase]: For 11875/11875 co-relation queries the response was YES. [2023-11-17 11:53:22,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5950 conditions, 965 events. 510/965 cut-off events. For 11875/11875 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4969 event pairs, 201 based on Foata normal form. 4/969 useless extension candidates. Maximal degree in co-relation 5835. Up to 827 conditions per place. [2023-11-17 11:53:22,681 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 144 selfloop transitions, 28 changer transitions 6/178 dead transitions. [2023-11-17 11:53:22,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 178 transitions, 2132 flow [2023-11-17 11:53:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:53:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:53:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 101 transitions. [2023-11-17 11:53:22,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3506944444444444 [2023-11-17 11:53:22,683 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 101 transitions. [2023-11-17 11:53:22,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 101 transitions. [2023-11-17 11:53:22,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:22,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 101 transitions. [2023-11-17 11:53:22,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:22,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:22,684 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:22,684 INFO L175 Difference]: Start difference. First operand has 176 places, 149 transitions, 1610 flow. Second operand 12 states and 101 transitions. [2023-11-17 11:53:22,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 178 transitions, 2132 flow [2023-11-17 11:53:22,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 178 transitions, 2086 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-17 11:53:22,741 INFO L231 Difference]: Finished difference. Result has 176 places, 146 transitions, 1590 flow [2023-11-17 11:53:22,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1590, PETRI_PLACES=176, PETRI_TRANSITIONS=146} [2023-11-17 11:53:22,741 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 154 predicate places. [2023-11-17 11:53:22,741 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 146 transitions, 1590 flow [2023-11-17 11:53:22,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:22,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:22,742 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:22,751 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 11:53:22,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:22,948 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 11:53:22,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:22,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1392194167, now seen corresponding path program 24 times [2023-11-17 11:53:22,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:22,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371741745] [2023-11-17 11:53:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:22,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:23,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:23,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371741745] [2023-11-17 11:53:23,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371741745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:23,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110187255] [2023-11-17 11:53:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:53:23,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:23,497 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 11:53:23,508 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 11:53:23,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:53:23,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:23,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:23,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:23,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:23,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:53:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:23,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:23,916 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:23,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:53:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:23,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110187255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:23,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:23,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:53:23,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078319960] [2023-11-17 11:53:23,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:23,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:53:23,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:23,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:53:23,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:53:23,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:23,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 146 transitions, 1590 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:23,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:23,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:23,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:24,427 INFO L124 PetriNetUnfolderBase]: 494/932 cut-off events. [2023-11-17 11:53:24,428 INFO L125 PetriNetUnfolderBase]: For 11599/11599 co-relation queries the response was YES. [2023-11-17 11:53:24,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5788 conditions, 932 events. 494/932 cut-off events. For 11599/11599 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4703 event pairs, 211 based on Foata normal form. 4/936 useless extension candidates. Maximal degree in co-relation 5674. Up to 847 conditions per place. [2023-11-17 11:53:24,435 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 131 selfloop transitions, 24 changer transitions 4/159 dead transitions. [2023-11-17 11:53:24,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 159 transitions, 1998 flow [2023-11-17 11:53:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:53:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:53:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 74 transitions. [2023-11-17 11:53:24,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30833333333333335 [2023-11-17 11:53:24,442 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 74 transitions. [2023-11-17 11:53:24,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 74 transitions. [2023-11-17 11:53:24,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:24,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 74 transitions. [2023-11-17 11:53:24,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:24,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:24,448 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:24,448 INFO L175 Difference]: Start difference. First operand has 176 places, 146 transitions, 1590 flow. Second operand 10 states and 74 transitions. [2023-11-17 11:53:24,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 159 transitions, 1998 flow [2023-11-17 11:53:24,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 159 transitions, 1924 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-11-17 11:53:24,507 INFO L231 Difference]: Finished difference. Result has 173 places, 144 transitions, 1545 flow [2023-11-17 11:53:24,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1545, PETRI_PLACES=173, PETRI_TRANSITIONS=144} [2023-11-17 11:53:24,508 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 151 predicate places. [2023-11-17 11:53:24,508 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 144 transitions, 1545 flow [2023-11-17 11:53:24,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:24,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:24,508 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:24,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:24,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:24,716 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 11:53:24,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:24,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1755392948, now seen corresponding path program 25 times [2023-11-17 11:53:24,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:24,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551250616] [2023-11-17 11:53:24,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:24,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:25,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:25,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551250616] [2023-11-17 11:53:25,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551250616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:25,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073730302] [2023-11-17 11:53:25,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:53:25,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:25,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:25,355 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 11:53:25,380 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 11:53:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:25,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:53:25,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:25,694 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:53:25,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-11-17 11:53:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:25,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:25,818 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:25,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:53:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:25,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073730302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:25,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:25,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2023-11-17 11:53:25,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532607515] [2023-11-17 11:53:25,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:25,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 11:53:25,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 11:53:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-11-17 11:53:25,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:25,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 144 transitions, 1545 flow. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:25,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:25,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:25,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:26,242 INFO L124 PetriNetUnfolderBase]: 495/927 cut-off events. [2023-11-17 11:53:26,242 INFO L125 PetriNetUnfolderBase]: For 11051/11051 co-relation queries the response was YES. [2023-11-17 11:53:26,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5677 conditions, 927 events. 495/927 cut-off events. For 11051/11051 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4636 event pairs, 195 based on Foata normal form. 6/933 useless extension candidates. Maximal degree in co-relation 5563. Up to 826 conditions per place. [2023-11-17 11:53:26,250 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 137 selfloop transitions, 24 changer transitions 0/161 dead transitions. [2023-11-17 11:53:26,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 161 transitions, 1984 flow [2023-11-17 11:53:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:53:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:53:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2023-11-17 11:53:26,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:53:26,257 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 72 transitions. [2023-11-17 11:53:26,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 72 transitions. [2023-11-17 11:53:26,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:26,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 72 transitions. [2023-11-17 11:53:26,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:26,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:26,259 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:26,259 INFO L175 Difference]: Start difference. First operand has 173 places, 144 transitions, 1545 flow. Second operand 9 states and 72 transitions. [2023-11-17 11:53:26,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 161 transitions, 1984 flow [2023-11-17 11:53:26,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 161 transitions, 1926 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-11-17 11:53:26,313 INFO L231 Difference]: Finished difference. Result has 170 places, 144 transitions, 1542 flow [2023-11-17 11:53:26,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1542, PETRI_PLACES=170, PETRI_TRANSITIONS=144} [2023-11-17 11:53:26,315 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2023-11-17 11:53:26,315 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 144 transitions, 1542 flow [2023-11-17 11:53:26,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:26,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:26,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:26,324 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 11:53:26,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:26,521 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 11:53:26,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:26,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1931265503, now seen corresponding path program 26 times [2023-11-17 11:53:26,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:26,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808811089] [2023-11-17 11:53:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:26,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:27,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:27,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808811089] [2023-11-17 11:53:27,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808811089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:27,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154270866] [2023-11-17 11:53:27,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:53:27,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:27,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:27,011 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 11:53:27,031 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 11:53:27,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:53:27,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:27,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:53:27,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:27,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:27,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:53:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:27,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:27,602 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:27,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:53:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:27,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154270866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:27,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:27,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:53:27,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3824873] [2023-11-17 11:53:27,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:27,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:53:27,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:53:27,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:53:27,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:27,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 144 transitions, 1542 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:27,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:27,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:27,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:28,046 INFO L124 PetriNetUnfolderBase]: 479/891 cut-off events. [2023-11-17 11:53:28,046 INFO L125 PetriNetUnfolderBase]: For 10691/10691 co-relation queries the response was YES. [2023-11-17 11:53:28,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5452 conditions, 891 events. 479/891 cut-off events. For 10691/10691 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4366 event pairs, 184 based on Foata normal form. 4/895 useless extension candidates. Maximal degree in co-relation 5338. Up to 778 conditions per place. [2023-11-17 11:53:28,054 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 127 selfloop transitions, 28 changer transitions 6/161 dead transitions. [2023-11-17 11:53:28,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 161 transitions, 1995 flow [2023-11-17 11:53:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 11:53:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 11:53:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2023-11-17 11:53:28,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3143939393939394 [2023-11-17 11:53:28,055 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 83 transitions. [2023-11-17 11:53:28,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 83 transitions. [2023-11-17 11:53:28,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:28,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 83 transitions. [2023-11-17 11:53:28,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:28,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:28,056 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:28,057 INFO L175 Difference]: Start difference. First operand has 170 places, 144 transitions, 1542 flow. Second operand 11 states and 83 transitions. [2023-11-17 11:53:28,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 161 transitions, 1995 flow [2023-11-17 11:53:28,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 161 transitions, 1937 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-17 11:53:28,098 INFO L231 Difference]: Finished difference. Result has 172 places, 141 transitions, 1518 flow [2023-11-17 11:53:28,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1518, PETRI_PLACES=172, PETRI_TRANSITIONS=141} [2023-11-17 11:53:28,099 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 150 predicate places. [2023-11-17 11:53:28,099 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 141 transitions, 1518 flow [2023-11-17 11:53:28,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:28,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:28,099 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:28,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-17 11:53:28,299 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,SelfDestructingSolverStorable34 [2023-11-17 11:53:28,300 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 11:53:28,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:28,300 INFO L85 PathProgramCache]: Analyzing trace with hash 896020885, now seen corresponding path program 27 times [2023-11-17 11:53:28,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:28,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884000364] [2023-11-17 11:53:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:28,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:29,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:29,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884000364] [2023-11-17 11:53:29,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884000364] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:29,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664148743] [2023-11-17 11:53:29,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:53:29,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:29,140 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 11:53:29,149 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 11:53:29,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 11:53:29,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:29,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 11:53:29,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:29,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:29,677 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:53:29,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2023-11-17 11:53:29,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:29,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:53:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:29,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:30,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:30,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 141 [2023-11-17 11:53:30,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:30,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-11-17 11:53:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:30,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664148743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:30,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:30,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-11-17 11:53:30,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419720130] [2023-11-17 11:53:30,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:30,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 11:53:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:30,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 11:53:30,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=702, Unknown=3, NotChecked=0, Total=812 [2023-11-17 11:53:30,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:30,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 141 transitions, 1518 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:30,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:30,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:30,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:31,131 INFO L124 PetriNetUnfolderBase]: 473/876 cut-off events. [2023-11-17 11:53:31,131 INFO L125 PetriNetUnfolderBase]: For 10347/10347 co-relation queries the response was YES. [2023-11-17 11:53:31,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5378 conditions, 876 events. 473/876 cut-off events. For 10347/10347 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4231 event pairs, 133 based on Foata normal form. 4/880 useless extension candidates. Maximal degree in co-relation 5264. Up to 521 conditions per place. [2023-11-17 11:53:31,138 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 118 selfloop transitions, 51 changer transitions 1/170 dead transitions. [2023-11-17 11:53:31,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 170 transitions, 2075 flow [2023-11-17 11:53:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:53:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:53:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2023-11-17 11:53:31,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-11-17 11:53:31,139 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 88 transitions. [2023-11-17 11:53:31,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 88 transitions. [2023-11-17 11:53:31,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:31,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 88 transitions. [2023-11-17 11:53:31,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:31,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:31,140 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:31,140 INFO L175 Difference]: Start difference. First operand has 172 places, 141 transitions, 1518 flow. Second operand 9 states and 88 transitions. [2023-11-17 11:53:31,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 170 transitions, 2075 flow [2023-11-17 11:53:31,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 170 transitions, 2005 flow, removed 7 selfloop flow, removed 10 redundant places. [2023-11-17 11:53:31,171 INFO L231 Difference]: Finished difference. Result has 169 places, 142 transitions, 1569 flow [2023-11-17 11:53:31,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1569, PETRI_PLACES=169, PETRI_TRANSITIONS=142} [2023-11-17 11:53:31,171 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 147 predicate places. [2023-11-17 11:53:31,171 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 142 transitions, 1569 flow [2023-11-17 11:53:31,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:31,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:31,172 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:31,178 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 11:53:31,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-17 11:53:31,378 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 11:53:31,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:31,378 INFO L85 PathProgramCache]: Analyzing trace with hash 154773759, now seen corresponding path program 28 times [2023-11-17 11:53:31,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:31,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813774845] [2023-11-17 11:53:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:31,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:31,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813774845] [2023-11-17 11:53:31,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813774845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:31,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561093347] [2023-11-17 11:53:31,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:53:31,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:31,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:31,947 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 11:53:31,949 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 11:53:32,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:53:32,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:32,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:53:32,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:32,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:32,366 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:32,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:53:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:32,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561093347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:32,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:32,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 11:53:32,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525119334] [2023-11-17 11:53:32,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:32,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:53:32,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:53:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:53:32,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:32,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 142 transitions, 1569 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:32,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:32,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:32,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:32,822 INFO L124 PetriNetUnfolderBase]: 469/872 cut-off events. [2023-11-17 11:53:32,822 INFO L125 PetriNetUnfolderBase]: For 10072/10072 co-relation queries the response was YES. [2023-11-17 11:53:32,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 872 events. 469/872 cut-off events. For 10072/10072 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4252 event pairs, 164 based on Foata normal form. 4/876 useless extension candidates. Maximal degree in co-relation 5293. Up to 740 conditions per place. [2023-11-17 11:53:32,828 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 123 selfloop transitions, 26 changer transitions 10/159 dead transitions. [2023-11-17 11:53:32,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 159 transitions, 1987 flow [2023-11-17 11:53:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:53:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:53:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2023-11-17 11:53:32,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32407407407407407 [2023-11-17 11:53:32,829 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 70 transitions. [2023-11-17 11:53:32,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 70 transitions. [2023-11-17 11:53:32,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:32,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 70 transitions. [2023-11-17 11:53:32,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:32,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:32,830 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:32,830 INFO L175 Difference]: Start difference. First operand has 169 places, 142 transitions, 1569 flow. Second operand 9 states and 70 transitions. [2023-11-17 11:53:32,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 159 transitions, 1987 flow [2023-11-17 11:53:32,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 159 transitions, 1917 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-11-17 11:53:32,865 INFO L231 Difference]: Finished difference. Result has 172 places, 142 transitions, 1558 flow [2023-11-17 11:53:32,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1558, PETRI_PLACES=172, PETRI_TRANSITIONS=142} [2023-11-17 11:53:32,865 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 150 predicate places. [2023-11-17 11:53:32,865 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 142 transitions, 1558 flow [2023-11-17 11:53:32,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:32,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:32,866 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:32,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:33,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:33,066 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 11:53:33,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:33,067 INFO L85 PathProgramCache]: Analyzing trace with hash -442034671, now seen corresponding path program 29 times [2023-11-17 11:53:33,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:33,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136552345] [2023-11-17 11:53:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:33,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:33,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136552345] [2023-11-17 11:53:33,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136552345] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224249676] [2023-11-17 11:53:33,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:53:33,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:33,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:33,599 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 11:53:33,619 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 11:53:33,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:53:33,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:33,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:33,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:34,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:34,146 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 11:53:34,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 11:53:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:34,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224249676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:34,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:34,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:53:34,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620958157] [2023-11-17 11:53:34,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:34,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:53:34,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:34,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:53:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:53:34,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:34,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 142 transitions, 1558 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:34,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:34,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:34,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:34,594 INFO L124 PetriNetUnfolderBase]: 480/882 cut-off events. [2023-11-17 11:53:34,594 INFO L125 PetriNetUnfolderBase]: For 10830/10830 co-relation queries the response was YES. [2023-11-17 11:53:34,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5555 conditions, 882 events. 480/882 cut-off events. For 10830/10830 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4273 event pairs, 25 based on Foata normal form. 4/886 useless extension candidates. Maximal degree in co-relation 5440. Up to 334 conditions per place. [2023-11-17 11:53:34,601 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 117 selfloop transitions, 58 changer transitions 0/175 dead transitions. [2023-11-17 11:53:34,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 175 transitions, 2240 flow [2023-11-17 11:53:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:53:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:53:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 96 transitions. [2023-11-17 11:53:34,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:53:34,602 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 96 transitions. [2023-11-17 11:53:34,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 96 transitions. [2023-11-17 11:53:34,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:34,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 96 transitions. [2023-11-17 11:53:34,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:34,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:34,605 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:34,605 INFO L175 Difference]: Start difference. First operand has 172 places, 142 transitions, 1558 flow. Second operand 12 states and 96 transitions. [2023-11-17 11:53:34,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 175 transitions, 2240 flow [2023-11-17 11:53:34,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 175 transitions, 2180 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-17 11:53:34,649 INFO L231 Difference]: Finished difference. Result has 176 places, 146 transitions, 1708 flow [2023-11-17 11:53:34,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1708, PETRI_PLACES=176, PETRI_TRANSITIONS=146} [2023-11-17 11:53:34,650 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 154 predicate places. [2023-11-17 11:53:34,650 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 146 transitions, 1708 flow [2023-11-17 11:53:34,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:34,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:34,651 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:34,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:34,851 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,SelfDestructingSolverStorable37 [2023-11-17 11:53:34,852 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 11:53:34,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1154724621, now seen corresponding path program 30 times [2023-11-17 11:53:34,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:34,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403566904] [2023-11-17 11:53:34,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:34,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:35,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:35,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403566904] [2023-11-17 11:53:35,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403566904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:35,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642145556] [2023-11-17 11:53:35,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:53:35,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:35,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:35,580 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 11:53:35,602 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 11:53:35,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:53:35,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:35,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 11:53:35,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:36,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:36,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:36,101 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:53:36,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 11:53:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:36,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:36,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:36,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 141 [2023-11-17 11:53:36,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:36,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-11-17 11:53:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:36,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642145556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:36,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:36,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2023-11-17 11:53:36,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570657067] [2023-11-17 11:53:36,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:36,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 11:53:36,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:36,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 11:53:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=660, Unknown=1, NotChecked=0, Total=756 [2023-11-17 11:53:36,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:36,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 146 transitions, 1708 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:36,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:36,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:36,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:37,318 INFO L124 PetriNetUnfolderBase]: 485/900 cut-off events. [2023-11-17 11:53:37,319 INFO L125 PetriNetUnfolderBase]: For 11611/11611 co-relation queries the response was YES. [2023-11-17 11:53:37,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5844 conditions, 900 events. 485/900 cut-off events. For 11611/11611 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4432 event pairs, 128 based on Foata normal form. 4/904 useless extension candidates. Maximal degree in co-relation 5727. Up to 525 conditions per place. [2023-11-17 11:53:37,328 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 111 selfloop transitions, 50 changer transitions 15/176 dead transitions. [2023-11-17 11:53:37,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 176 transitions, 2338 flow [2023-11-17 11:53:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:53:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:53:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2023-11-17 11:53:37,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-17 11:53:37,330 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 81 transitions. [2023-11-17 11:53:37,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 81 transitions. [2023-11-17 11:53:37,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:37,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 81 transitions. [2023-11-17 11:53:37,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:37,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:37,331 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:37,331 INFO L175 Difference]: Start difference. First operand has 176 places, 146 transitions, 1708 flow. Second operand 9 states and 81 transitions. [2023-11-17 11:53:37,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 176 transitions, 2338 flow [2023-11-17 11:53:37,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 176 transitions, 2197 flow, removed 22 selfloop flow, removed 11 redundant places. [2023-11-17 11:53:37,388 INFO L231 Difference]: Finished difference. Result has 175 places, 143 transitions, 1644 flow [2023-11-17 11:53:37,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1644, PETRI_PLACES=175, PETRI_TRANSITIONS=143} [2023-11-17 11:53:37,391 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 153 predicate places. [2023-11-17 11:53:37,391 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 143 transitions, 1644 flow [2023-11-17 11:53:37,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:37,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:37,391 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:37,403 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 11:53:37,599 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,SelfDestructingSolverStorable38 [2023-11-17 11:53:37,599 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 11:53:37,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1273400694, now seen corresponding path program 31 times [2023-11-17 11:53:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:37,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709536826] [2023-11-17 11:53:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:37,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:38,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709536826] [2023-11-17 11:53:38,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709536826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703175741] [2023-11-17 11:53:38,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:53:38,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:38,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:38,304 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 11:53:38,323 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 11:53:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:38,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-17 11:53:38,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:38,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:38,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 11:53:38,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:38,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-17 11:53:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:38,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 11:53:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:38,641 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-17 11:53:38,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-17 11:53:38,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:38,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2023-11-17 11:53:38,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-11-17 11:53:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:38,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:39,200 INFO L349 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-11-17 11:53:39,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 107 [2023-11-17 11:53:39,239 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:39,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-11-17 11:53:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:39,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703175741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:39,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:39,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-17 11:53:39,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432719071] [2023-11-17 11:53:39,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 11:53:39,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:39,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 11:53:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=654, Unknown=1, NotChecked=0, Total=756 [2023-11-17 11:53:39,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:39,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 143 transitions, 1644 flow. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:39,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:39,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:39,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:40,527 INFO L124 PetriNetUnfolderBase]: 489/898 cut-off events. [2023-11-17 11:53:40,527 INFO L125 PetriNetUnfolderBase]: For 11554/11554 co-relation queries the response was YES. [2023-11-17 11:53:40,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5837 conditions, 898 events. 489/898 cut-off events. For 11554/11554 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4367 event pairs, 75 based on Foata normal form. 6/904 useless extension candidates. Maximal degree in co-relation 5723. Up to 437 conditions per place. [2023-11-17 11:53:40,534 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 118 selfloop transitions, 57 changer transitions 0/175 dead transitions. [2023-11-17 11:53:40,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 175 transitions, 2320 flow [2023-11-17 11:53:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 11:53:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 11:53:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 91 transitions. [2023-11-17 11:53:40,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3446969696969697 [2023-11-17 11:53:40,541 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 91 transitions. [2023-11-17 11:53:40,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 91 transitions. [2023-11-17 11:53:40,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:40,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 91 transitions. [2023-11-17 11:53:40,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 11:53:40,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:40,542 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:40,542 INFO L175 Difference]: Start difference. First operand has 175 places, 143 transitions, 1644 flow. Second operand 11 states and 91 transitions. [2023-11-17 11:53:40,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 175 transitions, 2320 flow [2023-11-17 11:53:40,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 175 transitions, 2216 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-11-17 11:53:40,578 INFO L231 Difference]: Finished difference. Result has 177 places, 145 transitions, 1714 flow [2023-11-17 11:53:40,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1714, PETRI_PLACES=177, PETRI_TRANSITIONS=145} [2023-11-17 11:53:40,578 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 155 predicate places. [2023-11-17 11:53:40,578 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 145 transitions, 1714 flow [2023-11-17 11:53:40,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:40,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:40,579 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:40,585 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 11:53:40,783 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,SelfDestructingSolverStorable39 [2023-11-17 11:53:40,783 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:53:40,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1750723234, now seen corresponding path program 32 times [2023-11-17 11:53:40,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:40,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368511841] [2023-11-17 11:53:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:40,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:41,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:41,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368511841] [2023-11-17 11:53:41,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368511841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:41,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589032919] [2023-11-17 11:53:41,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:53:41,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:41,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:41,358 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 11:53:41,360 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 11:53:41,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:53:41,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:41,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 11:53:41,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:41,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:41,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:41,767 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:53:41,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2023-11-17 11:53:41,936 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:53:41,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-11-17 11:53:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:41,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:42,270 INFO L349 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-11-17 11:53:42,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 107 [2023-11-17 11:53:42,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:42,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-11-17 11:53:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:42,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589032919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:42,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:42,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2023-11-17 11:53:42,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470526933] [2023-11-17 11:53:42,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:42,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 11:53:42,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 11:53:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=865, Unknown=1, NotChecked=0, Total=992 [2023-11-17 11:53:42,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:42,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 145 transitions, 1714 flow. Second operand has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:42,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:42,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:42,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:43,480 INFO L124 PetriNetUnfolderBase]: 546/1016 cut-off events. [2023-11-17 11:53:43,480 INFO L125 PetriNetUnfolderBase]: For 14971/14971 co-relation queries the response was YES. [2023-11-17 11:53:43,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6819 conditions, 1016 events. 546/1016 cut-off events. For 14971/14971 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5223 event pairs, 50 based on Foata normal form. 10/1026 useless extension candidates. Maximal degree in co-relation 6704. Up to 445 conditions per place. [2023-11-17 11:53:43,487 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 125 selfloop transitions, 86 changer transitions 3/214 dead transitions. [2023-11-17 11:53:43,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 214 transitions, 2797 flow [2023-11-17 11:53:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 11:53:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 11:53:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 147 transitions. [2023-11-17 11:53:43,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3402777777777778 [2023-11-17 11:53:43,489 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 147 transitions. [2023-11-17 11:53:43,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 147 transitions. [2023-11-17 11:53:43,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:43,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 147 transitions. [2023-11-17 11:53:43,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.166666666666666) internal successors, (147), 18 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:43,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 24.0) internal successors, (456), 19 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:43,490 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 24.0) internal successors, (456), 19 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:43,490 INFO L175 Difference]: Start difference. First operand has 177 places, 145 transitions, 1714 flow. Second operand 18 states and 147 transitions. [2023-11-17 11:53:43,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 214 transitions, 2797 flow [2023-11-17 11:53:43,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 214 transitions, 2689 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-11-17 11:53:43,533 INFO L231 Difference]: Finished difference. Result has 192 places, 160 transitions, 2084 flow [2023-11-17 11:53:43,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2084, PETRI_PLACES=192, PETRI_TRANSITIONS=160} [2023-11-17 11:53:43,534 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 170 predicate places. [2023-11-17 11:53:43,534 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 160 transitions, 2084 flow [2023-11-17 11:53:43,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:43,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:43,534 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:43,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:43,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:43,735 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:53:43,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:43,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1090760435, now seen corresponding path program 33 times [2023-11-17 11:53:43,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:43,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526641593] [2023-11-17 11:53:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:43,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:44,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:44,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526641593] [2023-11-17 11:53:44,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526641593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:44,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335938300] [2023-11-17 11:53:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:53:44,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:44,225 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:44,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 11:53:44,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:53:44,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:44,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:44,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:44,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:44,687 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 11:53:44,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 11:53:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:44,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335938300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:44,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:44,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 11:53:44,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178972250] [2023-11-17 11:53:44,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:44,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:53:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:44,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:53:44,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:53:44,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:44,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 160 transitions, 2084 flow. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 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 11:53:44,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:44,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:44,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:45,107 INFO L124 PetriNetUnfolderBase]: 564/1042 cut-off events. [2023-11-17 11:53:45,107 INFO L125 PetriNetUnfolderBase]: For 17852/17852 co-relation queries the response was YES. [2023-11-17 11:53:45,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7603 conditions, 1042 events. 564/1042 cut-off events. For 17852/17852 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5374 event pairs, 46 based on Foata normal form. 4/1046 useless extension candidates. Maximal degree in co-relation 7483. Up to 402 conditions per place. [2023-11-17 11:53:45,115 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 122 selfloop transitions, 66 changer transitions 1/189 dead transitions. [2023-11-17 11:53:45,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 189 transitions, 2810 flow [2023-11-17 11:53:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:53:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:53:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 82 transitions. [2023-11-17 11:53:45,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416666666666667 [2023-11-17 11:53:45,116 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 82 transitions. [2023-11-17 11:53:45,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 82 transitions. [2023-11-17 11:53:45,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:45,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 82 transitions. [2023-11-17 11:53:45,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.2) internal successors, (82), 10 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 11:53:45,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:45,117 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:45,117 INFO L175 Difference]: Start difference. First operand has 192 places, 160 transitions, 2084 flow. Second operand 10 states and 82 transitions. [2023-11-17 11:53:45,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 189 transitions, 2810 flow [2023-11-17 11:53:45,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 189 transitions, 2569 flow, removed 50 selfloop flow, removed 12 redundant places. [2023-11-17 11:53:45,173 INFO L231 Difference]: Finished difference. Result has 191 places, 163 transitions, 2063 flow [2023-11-17 11:53:45,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2063, PETRI_PLACES=191, PETRI_TRANSITIONS=163} [2023-11-17 11:53:45,173 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 169 predicate places. [2023-11-17 11:53:45,173 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 163 transitions, 2063 flow [2023-11-17 11:53:45,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 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 11:53:45,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:45,176 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:45,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-17 11:53:45,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:45,378 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:53:45,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:45,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1752124852, now seen corresponding path program 34 times [2023-11-17 11:53:45,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:45,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275365101] [2023-11-17 11:53:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:45,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 11:53:46,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:46,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275365101] [2023-11-17 11:53:46,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275365101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:46,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242572592] [2023-11-17 11:53:46,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:53:46,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:46,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:46,231 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:46,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 11:53:46,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:53:46,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:46,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-17 11:53:46,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:46,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-17 11:53:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:46,688 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:53:46,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2023-11-17 11:53:46,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:46,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:53:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:46,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:47,066 INFO L349 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-11-17 11:53:47,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 107 [2023-11-17 11:53:47,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:47,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-11-17 11:53:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:47,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242572592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:47,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:47,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 33 [2023-11-17 11:53:47,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237277424] [2023-11-17 11:53:47,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:47,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 11:53:47,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:47,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 11:53:47,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=982, Unknown=1, NotChecked=0, Total=1122 [2023-11-17 11:53:47,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:47,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 163 transitions, 2063 flow. Second operand has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:47,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:47,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:47,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:48,367 INFO L124 PetriNetUnfolderBase]: 560/1038 cut-off events. [2023-11-17 11:53:48,367 INFO L125 PetriNetUnfolderBase]: For 16438/16438 co-relation queries the response was YES. [2023-11-17 11:53:48,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7523 conditions, 1038 events. 560/1038 cut-off events. For 16438/16438 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5401 event pairs, 43 based on Foata normal form. 4/1042 useless extension candidates. Maximal degree in co-relation 7404. Up to 379 conditions per place. [2023-11-17 11:53:48,379 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 115 selfloop transitions, 90 changer transitions 6/211 dead transitions. [2023-11-17 11:53:48,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 211 transitions, 2948 flow [2023-11-17 11:53:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:53:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:53:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 149 transitions. [2023-11-17 11:53:48,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3104166666666667 [2023-11-17 11:53:48,380 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 149 transitions. [2023-11-17 11:53:48,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 149 transitions. [2023-11-17 11:53:48,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:48,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 149 transitions. [2023-11-17 11:53:48,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:48,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:48,382 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:48,382 INFO L175 Difference]: Start difference. First operand has 191 places, 163 transitions, 2063 flow. Second operand 20 states and 149 transitions. [2023-11-17 11:53:48,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 211 transitions, 2948 flow [2023-11-17 11:53:48,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 211 transitions, 2832 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-17 11:53:48,441 INFO L231 Difference]: Finished difference. Result has 207 places, 165 transitions, 2249 flow [2023-11-17 11:53:48,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2249, PETRI_PLACES=207, PETRI_TRANSITIONS=165} [2023-11-17 11:53:48,442 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 185 predicate places. [2023-11-17 11:53:48,442 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 165 transitions, 2249 flow [2023-11-17 11:53:48,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:48,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:48,442 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:48,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:48,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-17 11:53:48,643 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:53:48,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1766460203, now seen corresponding path program 35 times [2023-11-17 11:53:48,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:48,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929547673] [2023-11-17 11:53:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:48,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:49,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:49,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929547673] [2023-11-17 11:53:49,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929547673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:49,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20767909] [2023-11-17 11:53:49,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:53:49,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:49,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:49,323 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:49,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 11:53:49,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:53:49,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:49,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-17 11:53:49,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:49,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:49,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-17 11:53:49,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:49,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:49,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 11:53:49,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:49,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:49,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 11:53:49,672 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 11:53:49,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-17 11:53:49,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:49,805 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:53:49,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 11:53:49,941 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 11:53:49,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 31 [2023-11-17 11:53:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:49,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:50,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:50,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 141 [2023-11-17 11:53:50,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:50,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-11-17 11:53:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:50,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20767909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:50,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:50,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 30 [2023-11-17 11:53:50,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262438936] [2023-11-17 11:53:50,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 11:53:50,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 11:53:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=828, Unknown=2, NotChecked=0, Total=930 [2023-11-17 11:53:50,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:50,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 165 transitions, 2249 flow. Second operand has 31 states, 31 states have (on average 4.774193548387097) internal successors, (148), 31 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:50,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:50,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:50,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:51,188 INFO L124 PetriNetUnfolderBase]: 547/1013 cut-off events. [2023-11-17 11:53:51,188 INFO L125 PetriNetUnfolderBase]: For 16338/16338 co-relation queries the response was YES. [2023-11-17 11:53:51,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 1013 events. 547/1013 cut-off events. For 16338/16338 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5153 event pairs, 108 based on Foata normal form. 4/1017 useless extension candidates. Maximal degree in co-relation 7421. Up to 636 conditions per place. [2023-11-17 11:53:51,196 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 124 selfloop transitions, 53 changer transitions 8/185 dead transitions. [2023-11-17 11:53:51,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 185 transitions, 2746 flow [2023-11-17 11:53:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:53:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:53:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2023-11-17 11:53:51,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2023-11-17 11:53:51,197 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 85 transitions. [2023-11-17 11:53:51,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 85 transitions. [2023-11-17 11:53:51,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:51,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 85 transitions. [2023-11-17 11:53:51,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:51,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:51,198 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:51,198 INFO L175 Difference]: Start difference. First operand has 207 places, 165 transitions, 2249 flow. Second operand 10 states and 85 transitions. [2023-11-17 11:53:51,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 185 transitions, 2746 flow [2023-11-17 11:53:51,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 185 transitions, 2476 flow, removed 41 selfloop flow, removed 15 redundant places. [2023-11-17 11:53:51,251 INFO L231 Difference]: Finished difference. Result has 200 places, 162 transitions, 2066 flow [2023-11-17 11:53:51,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2066, PETRI_PLACES=200, PETRI_TRANSITIONS=162} [2023-11-17 11:53:51,252 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 178 predicate places. [2023-11-17 11:53:51,252 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 162 transitions, 2066 flow [2023-11-17 11:53:51,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.774193548387097) internal successors, (148), 31 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:51,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:51,252 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:51,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:51,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-17 11:53:51,453 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:53:51,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:51,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1629839125, now seen corresponding path program 36 times [2023-11-17 11:53:51,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:51,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844331650] [2023-11-17 11:53:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:52,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:52,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844331650] [2023-11-17 11:53:52,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844331650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:52,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393617854] [2023-11-17 11:53:52,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:53:52,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:52,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:52,025 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:52,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 11:53:52,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:53:52,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:52,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:53:52,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:52,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:52,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:53:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:52,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:52,821 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:53:52,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:53:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:52,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393617854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:52,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:52,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:53:52,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066573659] [2023-11-17 11:53:52,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:52,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:53:52,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:52,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:53:52,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:53:52,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:52,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 162 transitions, 2066 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:53:52,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:52,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:52,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:53,295 INFO L124 PetriNetUnfolderBase]: 555/1027 cut-off events. [2023-11-17 11:53:53,295 INFO L125 PetriNetUnfolderBase]: For 14729/14729 co-relation queries the response was YES. [2023-11-17 11:53:53,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7264 conditions, 1027 events. 555/1027 cut-off events. For 14729/14729 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5288 event pairs, 184 based on Foata normal form. 4/1031 useless extension candidates. Maximal degree in co-relation 7148. Up to 853 conditions per place. [2023-11-17 11:53:53,303 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 145 selfloop transitions, 35 changer transitions 0/180 dead transitions. [2023-11-17 11:53:53,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 180 transitions, 2552 flow [2023-11-17 11:53:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:53:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:53:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2023-11-17 11:53:53,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3472222222222222 [2023-11-17 11:53:53,304 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 75 transitions. [2023-11-17 11:53:53,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 75 transitions. [2023-11-17 11:53:53,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:53,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 75 transitions. [2023-11-17 11:53:53,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:53,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:53,305 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:53,305 INFO L175 Difference]: Start difference. First operand has 200 places, 162 transitions, 2066 flow. Second operand 9 states and 75 transitions. [2023-11-17 11:53:53,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 180 transitions, 2552 flow [2023-11-17 11:53:53,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 180 transitions, 2433 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-17 11:53:53,348 INFO L231 Difference]: Finished difference. Result has 198 places, 163 transitions, 2062 flow [2023-11-17 11:53:53,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2062, PETRI_PLACES=198, PETRI_TRANSITIONS=163} [2023-11-17 11:53:53,348 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 176 predicate places. [2023-11-17 11:53:53,348 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 163 transitions, 2062 flow [2023-11-17 11:53:53,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:53:53,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:53,348 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:53,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:53,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-17 11:53:53,549 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:53:53,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:53,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1762655768, now seen corresponding path program 37 times [2023-11-17 11:53:53,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:53,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410844663] [2023-11-17 11:53:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:53,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:54,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:54,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410844663] [2023-11-17 11:53:54,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410844663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:54,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348992243] [2023-11-17 11:53:54,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:53:54,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:54,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:54,207 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:54,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 11:53:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:54,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-17 11:53:54,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:54,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:54,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 11:53:54,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:54,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-11-17 11:53:54,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:54,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-17 11:53:54,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:54,516 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-17 11:53:54,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-17 11:53:54,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:54,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2023-11-17 11:53:54,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2023-11-17 11:53:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:54,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:55,020 INFO L349 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-11-17 11:53:55,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 107 [2023-11-17 11:53:55,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:55,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-11-17 11:53:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:55,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348992243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:55,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:55,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-17 11:53:55,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996436737] [2023-11-17 11:53:55,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:55,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 11:53:55,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 11:53:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=659, Unknown=1, NotChecked=0, Total=756 [2023-11-17 11:53:55,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:55,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 163 transitions, 2062 flow. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:55,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:55,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:55,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:56,051 INFO L124 PetriNetUnfolderBase]: 573/1055 cut-off events. [2023-11-17 11:53:56,051 INFO L125 PetriNetUnfolderBase]: For 13329/13329 co-relation queries the response was YES. [2023-11-17 11:53:56,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7403 conditions, 1055 events. 573/1055 cut-off events. For 13329/13329 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5439 event pairs, 47 based on Foata normal form. 6/1061 useless extension candidates. Maximal degree in co-relation 7287. Up to 401 conditions per place. [2023-11-17 11:53:56,059 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 114 selfloop transitions, 88 changer transitions 0/202 dead transitions. [2023-11-17 11:53:56,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 202 transitions, 2791 flow [2023-11-17 11:53:56,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:53:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:53:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 115 transitions. [2023-11-17 11:53:56,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2023-11-17 11:53:56,060 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 115 transitions. [2023-11-17 11:53:56,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 115 transitions. [2023-11-17 11:53:56,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:56,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 115 transitions. [2023-11-17 11:53:56,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 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 11:53:56,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:56,061 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:56,061 INFO L175 Difference]: Start difference. First operand has 198 places, 163 transitions, 2062 flow. Second operand 14 states and 115 transitions. [2023-11-17 11:53:56,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 202 transitions, 2791 flow [2023-11-17 11:53:56,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 202 transitions, 2698 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-11-17 11:53:56,110 INFO L231 Difference]: Finished difference. Result has 203 places, 166 transitions, 2216 flow [2023-11-17 11:53:56,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2216, PETRI_PLACES=203, PETRI_TRANSITIONS=166} [2023-11-17 11:53:56,111 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 181 predicate places. [2023-11-17 11:53:56,111 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 166 transitions, 2216 flow [2023-11-17 11:53:56,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:56,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:56,111 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:56,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:56,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-17 11:53:56,312 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:53:56,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash -817893785, now seen corresponding path program 38 times [2023-11-17 11:53:56,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:56,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092384986] [2023-11-17 11:53:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:56,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 11:53:57,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:57,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092384986] [2023-11-17 11:53:57,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092384986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:57,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091270460] [2023-11-17 11:53:57,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:53:57,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:57,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:57,319 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:57,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 11:53:57,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:53:57,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:57,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 11:53:57,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:57,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:57,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:57,759 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:53:57,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2023-11-17 11:53:57,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:57,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:53:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:57,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:58,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:58,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 141 [2023-11-17 11:53:58,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:58,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-11-17 11:53:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:53:58,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091270460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:58,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:58,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 34 [2023-11-17 11:53:58,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477658491] [2023-11-17 11:53:58,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:58,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 11:53:58,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:58,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 11:53:58,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1069, Unknown=1, NotChecked=0, Total=1190 [2023-11-17 11:53:58,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:53:58,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 166 transitions, 2216 flow. Second operand has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:58,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:58,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:53:58,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:59,348 INFO L124 PetriNetUnfolderBase]: 563/1035 cut-off events. [2023-11-17 11:53:59,349 INFO L125 PetriNetUnfolderBase]: For 14325/14325 co-relation queries the response was YES. [2023-11-17 11:53:59,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7514 conditions, 1035 events. 563/1035 cut-off events. For 14325/14325 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5281 event pairs, 145 based on Foata normal form. 4/1039 useless extension candidates. Maximal degree in co-relation 7396. Up to 673 conditions per place. [2023-11-17 11:53:59,357 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 120 selfloop transitions, 62 changer transitions 4/186 dead transitions. [2023-11-17 11:53:59,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 186 transitions, 2718 flow [2023-11-17 11:53:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 11:53:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 11:53:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2023-11-17 11:53:59,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3141025641025641 [2023-11-17 11:53:59,358 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 98 transitions. [2023-11-17 11:53:59,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 98 transitions. [2023-11-17 11:53:59,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:59,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 98 transitions. [2023-11-17 11:53:59,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:59,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:59,359 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:59,359 INFO L175 Difference]: Start difference. First operand has 203 places, 166 transitions, 2216 flow. Second operand 13 states and 98 transitions. [2023-11-17 11:53:59,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 186 transitions, 2718 flow [2023-11-17 11:53:59,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 186 transitions, 2530 flow, removed 7 selfloop flow, removed 13 redundant places. [2023-11-17 11:53:59,403 INFO L231 Difference]: Finished difference. Result has 202 places, 164 transitions, 2128 flow [2023-11-17 11:53:59,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2128, PETRI_PLACES=202, PETRI_TRANSITIONS=164} [2023-11-17 11:53:59,404 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 180 predicate places. [2023-11-17 11:53:59,404 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 164 transitions, 2128 flow [2023-11-17 11:53:59,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:59,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:59,404 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:59,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:59,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:59,605 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:53:59,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:59,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1356042545, now seen corresponding path program 39 times [2023-11-17 11:53:59,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:59,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457649757] [2023-11-17 11:53:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:59,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:00,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457649757] [2023-11-17 11:54:00,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457649757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49131024] [2023-11-17 11:54:00,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:54:00,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:00,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:00,101 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:00,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-17 11:54:00,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 11:54:00,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:00,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:54:00,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:00,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:00,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:54:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:00,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:00,580 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:00,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:54:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:00,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49131024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:00,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:00,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 11:54:00,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738155098] [2023-11-17 11:54:00,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:00,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:54:00,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:00,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:54:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:54:00,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:00,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 164 transitions, 2128 flow. Second operand has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 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 11:54:00,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:00,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:00,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:01,124 INFO L124 PetriNetUnfolderBase]: 590/1086 cut-off events. [2023-11-17 11:54:01,124 INFO L125 PetriNetUnfolderBase]: For 16028/16028 co-relation queries the response was YES. [2023-11-17 11:54:01,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7752 conditions, 1086 events. 590/1086 cut-off events. For 16028/16028 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5627 event pairs, 178 based on Foata normal form. 4/1090 useless extension candidates. Maximal degree in co-relation 7630. Up to 853 conditions per place. [2023-11-17 11:54:01,133 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 160 selfloop transitions, 42 changer transitions 2/204 dead transitions. [2023-11-17 11:54:01,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 204 transitions, 2931 flow [2023-11-17 11:54:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:54:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:54:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 113 transitions. [2023-11-17 11:54:01,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2023-11-17 11:54:01,134 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 113 transitions. [2023-11-17 11:54:01,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 113 transitions. [2023-11-17 11:54:01,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:01,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 113 transitions. [2023-11-17 11:54:01,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:01,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:01,135 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:01,135 INFO L175 Difference]: Start difference. First operand has 202 places, 164 transitions, 2128 flow. Second operand 14 states and 113 transitions. [2023-11-17 11:54:01,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 204 transitions, 2931 flow [2023-11-17 11:54:01,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 204 transitions, 2801 flow, removed 1 selfloop flow, removed 12 redundant places. [2023-11-17 11:54:01,187 INFO L231 Difference]: Finished difference. Result has 205 places, 169 transitions, 2253 flow [2023-11-17 11:54:01,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2253, PETRI_PLACES=205, PETRI_TRANSITIONS=169} [2023-11-17 11:54:01,188 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 183 predicate places. [2023-11-17 11:54:01,188 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 169 transitions, 2253 flow [2023-11-17 11:54:01,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 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 11:54:01,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:01,188 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:01,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:01,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-17 11:54:01,389 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:01,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:01,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2063364949, now seen corresponding path program 40 times [2023-11-17 11:54:01,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:01,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531595948] [2023-11-17 11:54:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:01,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 11:54:02,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:02,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531595948] [2023-11-17 11:54:02,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531595948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:02,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251373737] [2023-11-17 11:54:02,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:54:02,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:02,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:02,291 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:02,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-17 11:54:02,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:54:02,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:02,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 11:54:02,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:02,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:02,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:54:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:02,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:03,062 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 11:54:03,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 11:54:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:03,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251373737] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:03,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:03,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 8] total 29 [2023-11-17 11:54:03,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259097341] [2023-11-17 11:54:03,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:03,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 11:54:03,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:03,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 11:54:03,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-11-17 11:54:03,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:03,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 169 transitions, 2253 flow. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:03,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:03,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:03,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:04,702 INFO L124 PetriNetUnfolderBase]: 641/1193 cut-off events. [2023-11-17 11:54:04,702 INFO L125 PetriNetUnfolderBase]: For 19294/19294 co-relation queries the response was YES. [2023-11-17 11:54:04,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8599 conditions, 1193 events. 641/1193 cut-off events. For 19294/19294 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6396 event pairs, 19 based on Foata normal form. 9/1202 useless extension candidates. Maximal degree in co-relation 8481. Up to 434 conditions per place. [2023-11-17 11:54:04,712 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 140 selfloop transitions, 120 changer transitions 10/270 dead transitions. [2023-11-17 11:54:04,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 270 transitions, 3765 flow [2023-11-17 11:54:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 11:54:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 11:54:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 230 transitions. [2023-11-17 11:54:04,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33045977011494254 [2023-11-17 11:54:04,713 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 230 transitions. [2023-11-17 11:54:04,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 230 transitions. [2023-11-17 11:54:04,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:04,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 230 transitions. [2023-11-17 11:54:04,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 7.931034482758621) internal successors, (230), 29 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:04,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 24.0) internal successors, (720), 30 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:04,715 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 24.0) internal successors, (720), 30 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:04,715 INFO L175 Difference]: Start difference. First operand has 205 places, 169 transitions, 2253 flow. Second operand 29 states and 230 transitions. [2023-11-17 11:54:04,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 270 transitions, 3765 flow [2023-11-17 11:54:04,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 270 transitions, 3611 flow, removed 46 selfloop flow, removed 9 redundant places. [2023-11-17 11:54:04,791 INFO L231 Difference]: Finished difference. Result has 232 places, 195 transitions, 2924 flow [2023-11-17 11:54:04,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2924, PETRI_PLACES=232, PETRI_TRANSITIONS=195} [2023-11-17 11:54:04,792 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 210 predicate places. [2023-11-17 11:54:04,792 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 195 transitions, 2924 flow [2023-11-17 11:54:04,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:04,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:04,792 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:04,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-17 11:54:04,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-17 11:54:04,996 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:04,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:04,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2617128, now seen corresponding path program 41 times [2023-11-17 11:54:04,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:04,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484869993] [2023-11-17 11:54:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:04,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:05,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:05,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484869993] [2023-11-17 11:54:05,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484869993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:05,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947820661] [2023-11-17 11:54:05,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:54:05,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:05,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:05,401 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:05,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-17 11:54:05,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:54:05,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:05,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:54:05,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:05,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:05,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:54:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:05,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:06,031 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:06,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:54:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:06,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947820661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:06,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:06,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 11:54:06,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146543937] [2023-11-17 11:54:06,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:06,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:54:06,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:06,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:54:06,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:54:06,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:06,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 195 transitions, 2924 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:06,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:06,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:06,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:06,668 INFO L124 PetriNetUnfolderBase]: 659/1236 cut-off events. [2023-11-17 11:54:06,669 INFO L125 PetriNetUnfolderBase]: For 21182/21182 co-relation queries the response was YES. [2023-11-17 11:54:06,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9709 conditions, 1236 events. 659/1236 cut-off events. For 21182/21182 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6746 event pairs, 224 based on Foata normal form. 6/1242 useless extension candidates. Maximal degree in co-relation 9577. Up to 1028 conditions per place. [2023-11-17 11:54:06,679 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 199 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2023-11-17 11:54:06,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 239 transitions, 3793 flow [2023-11-17 11:54:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:54:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:54:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 117 transitions. [2023-11-17 11:54:06,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2023-11-17 11:54:06,680 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 117 transitions. [2023-11-17 11:54:06,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 117 transitions. [2023-11-17 11:54:06,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:06,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 117 transitions. [2023-11-17 11:54:06,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.357142857142858) internal successors, (117), 14 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 11:54:06,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:06,682 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:06,682 INFO L175 Difference]: Start difference. First operand has 232 places, 195 transitions, 2924 flow. Second operand 14 states and 117 transitions. [2023-11-17 11:54:06,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 239 transitions, 3793 flow [2023-11-17 11:54:06,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 239 transitions, 3140 flow, removed 202 selfloop flow, removed 26 redundant places. [2023-11-17 11:54:06,774 INFO L231 Difference]: Finished difference. Result has 222 places, 200 transitions, 2527 flow [2023-11-17 11:54:06,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2527, PETRI_PLACES=222, PETRI_TRANSITIONS=200} [2023-11-17 11:54:06,774 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 200 predicate places. [2023-11-17 11:54:06,774 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 200 transitions, 2527 flow [2023-11-17 11:54:06,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:06,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:06,775 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:06,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-17 11:54:06,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-17 11:54:06,975 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:06,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash 975034000, now seen corresponding path program 42 times [2023-11-17 11:54:06,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:06,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415979103] [2023-11-17 11:54:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:06,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:07,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415979103] [2023-11-17 11:54:07,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415979103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982497585] [2023-11-17 11:54:07,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:54:07,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:07,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:07,535 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:07,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-17 11:54:07,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:54:07,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:07,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:54:07,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:08,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:08,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:54:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:08,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:08,167 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:08,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:54:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982497585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:08,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:08,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:54:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797704405] [2023-11-17 11:54:08,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:08,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:54:08,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:54:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:54:08,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:08,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 200 transitions, 2527 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:08,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:08,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:08,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:08,591 INFO L124 PetriNetUnfolderBase]: 671/1270 cut-off events. [2023-11-17 11:54:08,591 INFO L125 PetriNetUnfolderBase]: For 18163/18163 co-relation queries the response was YES. [2023-11-17 11:54:08,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8610 conditions, 1270 events. 671/1270 cut-off events. For 18163/18163 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7027 event pairs, 235 based on Foata normal form. 6/1276 useless extension candidates. Maximal degree in co-relation 8495. Up to 1081 conditions per place. [2023-11-17 11:54:08,602 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 182 selfloop transitions, 38 changer transitions 0/220 dead transitions. [2023-11-17 11:54:08,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 220 transitions, 3132 flow [2023-11-17 11:54:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:54:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:54:08,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 76 transitions. [2023-11-17 11:54:08,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2023-11-17 11:54:08,603 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 76 transitions. [2023-11-17 11:54:08,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 76 transitions. [2023-11-17 11:54:08,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:08,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 76 transitions. [2023-11-17 11:54:08,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:08,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:08,604 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:08,604 INFO L175 Difference]: Start difference. First operand has 222 places, 200 transitions, 2527 flow. Second operand 9 states and 76 transitions. [2023-11-17 11:54:08,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 220 transitions, 3132 flow [2023-11-17 11:54:08,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 220 transitions, 2945 flow, removed 51 selfloop flow, removed 13 redundant places. [2023-11-17 11:54:08,653 INFO L231 Difference]: Finished difference. Result has 218 places, 201 transitions, 2456 flow [2023-11-17 11:54:08,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2350, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2456, PETRI_PLACES=218, PETRI_TRANSITIONS=201} [2023-11-17 11:54:08,654 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 196 predicate places. [2023-11-17 11:54:08,654 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 201 transitions, 2456 flow [2023-11-17 11:54:08,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:08,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:08,654 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:08,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:08,854 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:08,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash -867168774, now seen corresponding path program 43 times [2023-11-17 11:54:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:08,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296651851] [2023-11-17 11:54:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:08,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:54:09,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296651851] [2023-11-17 11:54:09,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296651851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:09,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845761276] [2023-11-17 11:54:09,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:54:09,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:09,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:09,842 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:09,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-17 11:54:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:10,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 11:54:10,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:10,270 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:54:10,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-11-17 11:54:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:10,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:10,609 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:10,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:54:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:10,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845761276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:10,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:10,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 31 [2023-11-17 11:54:10,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676820577] [2023-11-17 11:54:10,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:10,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 11:54:10,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 11:54:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2023-11-17 11:54:10,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:10,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 201 transitions, 2456 flow. Second operand has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:10,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:10,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:10,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:11,586 INFO L124 PetriNetUnfolderBase]: 696/1319 cut-off events. [2023-11-17 11:54:11,586 INFO L125 PetriNetUnfolderBase]: For 14134/14134 co-relation queries the response was YES. [2023-11-17 11:54:11,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8537 conditions, 1319 events. 696/1319 cut-off events. For 14134/14134 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7423 event pairs, 158 based on Foata normal form. 16/1335 useless extension candidates. Maximal degree in co-relation 8455. Up to 1116 conditions per place. [2023-11-17 11:54:11,597 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 194 selfloop transitions, 47 changer transitions 0/241 dead transitions. [2023-11-17 11:54:11,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 241 transitions, 3171 flow [2023-11-17 11:54:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:54:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:54:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 140 transitions. [2023-11-17 11:54:11,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2916666666666667 [2023-11-17 11:54:11,598 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 140 transitions. [2023-11-17 11:54:11,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 140 transitions. [2023-11-17 11:54:11,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:11,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 140 transitions. [2023-11-17 11:54:11,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.0) internal successors, (140), 20 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 11:54:11,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:11,600 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:11,600 INFO L175 Difference]: Start difference. First operand has 218 places, 201 transitions, 2456 flow. Second operand 20 states and 140 transitions. [2023-11-17 11:54:11,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 241 transitions, 3171 flow [2023-11-17 11:54:11,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 241 transitions, 3079 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-11-17 11:54:11,651 INFO L231 Difference]: Finished difference. Result has 232 places, 207 transitions, 2546 flow [2023-11-17 11:54:11,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2546, PETRI_PLACES=232, PETRI_TRANSITIONS=207} [2023-11-17 11:54:11,652 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 210 predicate places. [2023-11-17 11:54:11,652 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 207 transitions, 2546 flow [2023-11-17 11:54:11,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:11,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:11,652 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:11,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:11,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:11,859 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:11,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash 582797266, now seen corresponding path program 44 times [2023-11-17 11:54:11,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:11,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370293251] [2023-11-17 11:54:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:12,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:12,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370293251] [2023-11-17 11:54:12,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370293251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:12,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970456027] [2023-11-17 11:54:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:54:12,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:12,269 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:12,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-17 11:54:12,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:54:12,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:12,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:54:12,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:12,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:12,745 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:12,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:54:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:12,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970456027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:12,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:12,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 11:54:12,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662522195] [2023-11-17 11:54:12,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:12,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:54:12,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:54:12,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:54:12,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:12,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 207 transitions, 2546 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 11:54:12,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:12,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:12,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:13,178 INFO L124 PetriNetUnfolderBase]: 694/1317 cut-off events. [2023-11-17 11:54:13,178 INFO L125 PetriNetUnfolderBase]: For 14745/14745 co-relation queries the response was YES. [2023-11-17 11:54:13,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8691 conditions, 1317 events. 694/1317 cut-off events. For 14745/14745 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7359 event pairs, 251 based on Foata normal form. 2/1319 useless extension candidates. Maximal degree in co-relation 8570. Up to 1165 conditions per place. [2023-11-17 11:54:13,188 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 179 selfloop transitions, 32 changer transitions 4/215 dead transitions. [2023-11-17 11:54:13,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 215 transitions, 3024 flow [2023-11-17 11:54:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:54:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:54:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 64 transitions. [2023-11-17 11:54:13,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2962962962962963 [2023-11-17 11:54:13,189 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 64 transitions. [2023-11-17 11:54:13,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 64 transitions. [2023-11-17 11:54:13,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:13,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 64 transitions. [2023-11-17 11:54:13,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:13,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:13,190 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:13,190 INFO L175 Difference]: Start difference. First operand has 232 places, 207 transitions, 2546 flow. Second operand 9 states and 64 transitions. [2023-11-17 11:54:13,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 215 transitions, 3024 flow [2023-11-17 11:54:13,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 215 transitions, 2906 flow, removed 19 selfloop flow, removed 13 redundant places. [2023-11-17 11:54:13,238 INFO L231 Difference]: Finished difference. Result has 228 places, 205 transitions, 2458 flow [2023-11-17 11:54:13,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2458, PETRI_PLACES=228, PETRI_TRANSITIONS=205} [2023-11-17 11:54:13,238 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 206 predicate places. [2023-11-17 11:54:13,238 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 205 transitions, 2458 flow [2023-11-17 11:54:13,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 11:54:13,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:13,239 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:13,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:13,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:13,440 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:13,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1563373494, now seen corresponding path program 45 times [2023-11-17 11:54:13,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:13,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569814357] [2023-11-17 11:54:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:13,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:13,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:13,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569814357] [2023-11-17 11:54:13,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569814357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:13,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743496430] [2023-11-17 11:54:13,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:54:13,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:13,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:13,867 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:13,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-17 11:54:14,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:54:14,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:14,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:54:14,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:14,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:14,356 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-11-17 11:54:14,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-11-17 11:54:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:14,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743496430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:14,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:14,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-17 11:54:14,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908329109] [2023-11-17 11:54:14,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:14,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 11:54:14,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:14,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 11:54:14,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:54:14,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:14,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 205 transitions, 2458 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:14,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:14,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:14,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:14,841 INFO L124 PetriNetUnfolderBase]: 692/1318 cut-off events. [2023-11-17 11:54:14,841 INFO L125 PetriNetUnfolderBase]: For 14128/14128 co-relation queries the response was YES. [2023-11-17 11:54:14,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8595 conditions, 1318 events. 692/1318 cut-off events. For 14128/14128 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7431 event pairs, 139 based on Foata normal form. 2/1320 useless extension candidates. Maximal degree in co-relation 8480. Up to 672 conditions per place. [2023-11-17 11:54:14,849 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 141 selfloop transitions, 73 changer transitions 8/222 dead transitions. [2023-11-17 11:54:14,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 222 transitions, 2985 flow [2023-11-17 11:54:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:54:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:54:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2023-11-17 11:54:14,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3472222222222222 [2023-11-17 11:54:14,850 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 75 transitions. [2023-11-17 11:54:14,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 75 transitions. [2023-11-17 11:54:14,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:14,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 75 transitions. [2023-11-17 11:54:14,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:14,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:14,850 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:14,850 INFO L175 Difference]: Start difference. First operand has 228 places, 205 transitions, 2458 flow. Second operand 9 states and 75 transitions. [2023-11-17 11:54:14,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 222 transitions, 2985 flow [2023-11-17 11:54:14,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 222 transitions, 2911 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-17 11:54:14,893 INFO L231 Difference]: Finished difference. Result has 229 places, 203 transitions, 2509 flow [2023-11-17 11:54:14,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2509, PETRI_PLACES=229, PETRI_TRANSITIONS=203} [2023-11-17 11:54:14,893 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 207 predicate places. [2023-11-17 11:54:14,894 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 203 transitions, 2509 flow [2023-11-17 11:54:14,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:14,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:14,894 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:14,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:15,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-17 11:54:15,095 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:15,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:15,095 INFO L85 PathProgramCache]: Analyzing trace with hash 943544721, now seen corresponding path program 46 times [2023-11-17 11:54:15,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:15,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793467045] [2023-11-17 11:54:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:15,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:15,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793467045] [2023-11-17 11:54:15,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793467045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316498852] [2023-11-17 11:54:15,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:54:15,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:15,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:15,485 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:15,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-17 11:54:15,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:54:15,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:15,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:54:15,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:15,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:15,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:54:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:15,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:15,979 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:15,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:54:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:16,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316498852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:16,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:16,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:54:16,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038262990] [2023-11-17 11:54:16,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:16,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:54:16,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:16,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:54:16,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:54:16,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:16,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 203 transitions, 2509 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:54:16,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:16,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:16,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:16,500 INFO L124 PetriNetUnfolderBase]: 679/1286 cut-off events. [2023-11-17 11:54:16,500 INFO L125 PetriNetUnfolderBase]: For 15346/15346 co-relation queries the response was YES. [2023-11-17 11:54:16,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8593 conditions, 1286 events. 679/1286 cut-off events. For 15346/15346 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7162 event pairs, 240 based on Foata normal form. 4/1290 useless extension candidates. Maximal degree in co-relation 8477. Up to 1124 conditions per place. [2023-11-17 11:54:16,510 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 176 selfloop transitions, 35 changer transitions 4/215 dead transitions. [2023-11-17 11:54:16,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 215 transitions, 2997 flow [2023-11-17 11:54:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:54:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:54:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 75 transitions. [2023-11-17 11:54:16,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 11:54:16,510 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 75 transitions. [2023-11-17 11:54:16,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 75 transitions. [2023-11-17 11:54:16,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:16,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 75 transitions. [2023-11-17 11:54:16,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:16,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:16,511 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:16,511 INFO L175 Difference]: Start difference. First operand has 229 places, 203 transitions, 2509 flow. Second operand 10 states and 75 transitions. [2023-11-17 11:54:16,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 215 transitions, 2997 flow [2023-11-17 11:54:16,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 215 transitions, 2828 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-11-17 11:54:16,553 INFO L231 Difference]: Finished difference. Result has 225 places, 201 transitions, 2387 flow [2023-11-17 11:54:16,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2387, PETRI_PLACES=225, PETRI_TRANSITIONS=201} [2023-11-17 11:54:16,554 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 203 predicate places. [2023-11-17 11:54:16,554 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 201 transitions, 2387 flow [2023-11-17 11:54:16,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:54:16,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:16,554 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:16,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:16,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-17 11:54:16,755 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:16,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:16,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1474273430, now seen corresponding path program 47 times [2023-11-17 11:54:16,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:16,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491895535] [2023-11-17 11:54:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:16,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:17,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:17,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491895535] [2023-11-17 11:54:17,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491895535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:17,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786158987] [2023-11-17 11:54:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:54:17,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:17,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:17,157 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:17,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-17 11:54:17,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:54:17,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:17,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:54:17,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:17,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:17,647 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-11-17 11:54:17,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-11-17 11:54:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:17,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786158987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:17,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:17,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:54:17,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953424060] [2023-11-17 11:54:17,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:17,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:54:17,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:54:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:54:17,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:17,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 201 transitions, 2387 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:54:17,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:17,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:17,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:18,079 INFO L124 PetriNetUnfolderBase]: 674/1269 cut-off events. [2023-11-17 11:54:18,079 INFO L125 PetriNetUnfolderBase]: For 13852/13852 co-relation queries the response was YES. [2023-11-17 11:54:18,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8304 conditions, 1269 events. 674/1269 cut-off events. For 13852/13852 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7036 event pairs, 123 based on Foata normal form. 2/1271 useless extension candidates. Maximal degree in co-relation 8190. Up to 652 conditions per place. [2023-11-17 11:54:18,089 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 138 selfloop transitions, 75 changer transitions 8/221 dead transitions. [2023-11-17 11:54:18,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 221 transitions, 2937 flow [2023-11-17 11:54:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:54:18,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:54:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2023-11-17 11:54:18,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35648148148148145 [2023-11-17 11:54:18,090 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 77 transitions. [2023-11-17 11:54:18,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 77 transitions. [2023-11-17 11:54:18,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:18,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 77 transitions. [2023-11-17 11:54:18,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 11:54:18,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:18,090 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:18,090 INFO L175 Difference]: Start difference. First operand has 225 places, 201 transitions, 2387 flow. Second operand 9 states and 77 transitions. [2023-11-17 11:54:18,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 221 transitions, 2937 flow [2023-11-17 11:54:18,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 221 transitions, 2867 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 11:54:18,133 INFO L231 Difference]: Finished difference. Result has 224 places, 198 transitions, 2424 flow [2023-11-17 11:54:18,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2424, PETRI_PLACES=224, PETRI_TRANSITIONS=198} [2023-11-17 11:54:18,134 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 202 predicate places. [2023-11-17 11:54:18,134 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 198 transitions, 2424 flow [2023-11-17 11:54:18,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:54:18,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:18,134 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:18,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-17 11:54:18,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-17 11:54:18,342 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:18,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash -777569548, now seen corresponding path program 48 times [2023-11-17 11:54:18,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:18,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671928546] [2023-11-17 11:54:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:18,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:18,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:18,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671928546] [2023-11-17 11:54:18,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671928546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:18,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047772148] [2023-11-17 11:54:18,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:54:18,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:18,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:18,746 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:18,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-17 11:54:19,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:54:19,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:19,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:54:19,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:19,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:19,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:54:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:19,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:19,354 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:19,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:54:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:19,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047772148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:19,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:19,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:54:19,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030594538] [2023-11-17 11:54:19,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:19,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:54:19,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:54:19,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:54:19,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:19,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 198 transitions, 2424 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:54:19,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:19,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:19,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:19,783 INFO L124 PetriNetUnfolderBase]: 665/1235 cut-off events. [2023-11-17 11:54:19,783 INFO L125 PetriNetUnfolderBase]: For 14822/14822 co-relation queries the response was YES. [2023-11-17 11:54:19,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8344 conditions, 1235 events. 665/1235 cut-off events. For 14822/14822 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6647 event pairs, 222 based on Foata normal form. 2/1237 useless extension candidates. Maximal degree in co-relation 8230. Up to 1037 conditions per place. [2023-11-17 11:54:19,793 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 175 selfloop transitions, 38 changer transitions 2/215 dead transitions. [2023-11-17 11:54:19,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 215 transitions, 2948 flow [2023-11-17 11:54:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 11:54:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 11:54:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2023-11-17 11:54:19,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3143939393939394 [2023-11-17 11:54:19,794 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 83 transitions. [2023-11-17 11:54:19,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 83 transitions. [2023-11-17 11:54:19,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:19,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 83 transitions. [2023-11-17 11:54:19,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:19,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:19,795 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:19,795 INFO L175 Difference]: Start difference. First operand has 224 places, 198 transitions, 2424 flow. Second operand 11 states and 83 transitions. [2023-11-17 11:54:19,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 215 transitions, 2948 flow [2023-11-17 11:54:19,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 215 transitions, 2803 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-17 11:54:19,835 INFO L231 Difference]: Finished difference. Result has 225 places, 196 transitions, 2331 flow [2023-11-17 11:54:19,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2331, PETRI_PLACES=225, PETRI_TRANSITIONS=196} [2023-11-17 11:54:19,836 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 203 predicate places. [2023-11-17 11:54:19,836 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 196 transitions, 2331 flow [2023-11-17 11:54:19,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:54:19,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:19,836 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:19,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-17 11:54:20,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-11-17 11:54:20,036 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:20,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:20,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1904965641, now seen corresponding path program 49 times [2023-11-17 11:54:20,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:20,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172399501] [2023-11-17 11:54:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:20,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:20,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:20,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172399501] [2023-11-17 11:54:20,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172399501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:20,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105901614] [2023-11-17 11:54:20,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:54:20,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:20,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:20,422 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:20,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-17 11:54:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:20,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:54:20,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:20,781 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:54:20,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-11-17 11:54:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:20,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:20,880 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:20,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:54:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:20,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105901614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:20,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:20,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2023-11-17 11:54:20,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494423167] [2023-11-17 11:54:20,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:20,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 11:54:20,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:20,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 11:54:20,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-17 11:54:20,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:20,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 196 transitions, 2331 flow. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:20,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:20,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:20,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:21,261 INFO L124 PetriNetUnfolderBase]: 660/1222 cut-off events. [2023-11-17 11:54:21,261 INFO L125 PetriNetUnfolderBase]: For 13922/13922 co-relation queries the response was YES. [2023-11-17 11:54:21,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8121 conditions, 1222 events. 660/1222 cut-off events. For 13922/13922 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6532 event pairs, 221 based on Foata normal form. 4/1226 useless extension candidates. Maximal degree in co-relation 8007. Up to 1052 conditions per place. [2023-11-17 11:54:21,271 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 172 selfloop transitions, 35 changer transitions 0/207 dead transitions. [2023-11-17 11:54:21,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 207 transitions, 2812 flow [2023-11-17 11:54:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:54:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:54:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2023-11-17 11:54:21,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3148148148148148 [2023-11-17 11:54:21,272 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 68 transitions. [2023-11-17 11:54:21,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 68 transitions. [2023-11-17 11:54:21,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:21,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 68 transitions. [2023-11-17 11:54:21,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:21,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:21,273 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:21,273 INFO L175 Difference]: Start difference. First operand has 225 places, 196 transitions, 2331 flow. Second operand 9 states and 68 transitions. [2023-11-17 11:54:21,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 207 transitions, 2812 flow [2023-11-17 11:54:21,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 207 transitions, 2724 flow, removed 3 selfloop flow, removed 11 redundant places. [2023-11-17 11:54:21,314 INFO L231 Difference]: Finished difference. Result has 220 places, 195 transitions, 2306 flow [2023-11-17 11:54:21,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2306, PETRI_PLACES=220, PETRI_TRANSITIONS=195} [2023-11-17 11:54:21,314 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 198 predicate places. [2023-11-17 11:54:21,314 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 195 transitions, 2306 flow [2023-11-17 11:54:21,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:21,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:21,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:21,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-17 11:54:21,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-17 11:54:21,515 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:21,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash -946612651, now seen corresponding path program 50 times [2023-11-17 11:54:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:21,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391653729] [2023-11-17 11:54:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:21,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:21,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:21,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391653729] [2023-11-17 11:54:21,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391653729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:21,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936801943] [2023-11-17 11:54:21,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:54:21,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:21,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:21,915 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:21,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-17 11:54:22,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:54:22,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:22,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:54:22,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:22,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:22,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:54:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:22,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:22,400 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:22,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:54:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:22,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936801943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:22,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:22,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:54:22,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852520670] [2023-11-17 11:54:22,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:22,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:54:22,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:54:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:54:22,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:22,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 195 transitions, 2306 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 11:54:22,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:22,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:22,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:22,871 INFO L124 PetriNetUnfolderBase]: 650/1202 cut-off events. [2023-11-17 11:54:22,871 INFO L125 PetriNetUnfolderBase]: For 13340/13340 co-relation queries the response was YES. [2023-11-17 11:54:22,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7946 conditions, 1202 events. 650/1202 cut-off events. For 13340/13340 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6374 event pairs, 210 based on Foata normal form. 4/1206 useless extension candidates. Maximal degree in co-relation 7833. Up to 1013 conditions per place. [2023-11-17 11:54:22,880 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 167 selfloop transitions, 39 changer transitions 4/210 dead transitions. [2023-11-17 11:54:22,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 210 transitions, 2805 flow [2023-11-17 11:54:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 11:54:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 11:54:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 82 transitions. [2023-11-17 11:54:22,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3106060606060606 [2023-11-17 11:54:22,881 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 82 transitions. [2023-11-17 11:54:22,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 82 transitions. [2023-11-17 11:54:22,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:22,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 82 transitions. [2023-11-17 11:54:22,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 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 11:54:22,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:22,881 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:22,882 INFO L175 Difference]: Start difference. First operand has 220 places, 195 transitions, 2306 flow. Second operand 11 states and 82 transitions. [2023-11-17 11:54:22,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 210 transitions, 2805 flow [2023-11-17 11:54:22,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 210 transitions, 2738 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-17 11:54:22,920 INFO L231 Difference]: Finished difference. Result has 222 places, 193 transitions, 2294 flow [2023-11-17 11:54:22,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2294, PETRI_PLACES=222, PETRI_TRANSITIONS=193} [2023-11-17 11:54:22,921 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 200 predicate places. [2023-11-17 11:54:22,921 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 193 transitions, 2294 flow [2023-11-17 11:54:22,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 11:54:22,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:22,921 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:22,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:23,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-17 11:54:23,128 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:23,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1456537946, now seen corresponding path program 51 times [2023-11-17 11:54:23,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:23,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556154986] [2023-11-17 11:54:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:23,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:23,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:23,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556154986] [2023-11-17 11:54:23,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556154986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:23,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118625991] [2023-11-17 11:54:23,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:54:23,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:23,518 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:23,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-17 11:54:23,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:54:23,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:23,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:54:23,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:23,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:23,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:54:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:23,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:24,004 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:24,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:54:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:24,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118625991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:24,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:24,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:54:24,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172031814] [2023-11-17 11:54:24,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:24,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:54:24,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:54:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:54:24,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:24,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 193 transitions, 2294 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:54:24,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:24,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:24,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:24,450 INFO L124 PetriNetUnfolderBase]: 643/1175 cut-off events. [2023-11-17 11:54:24,450 INFO L125 PetriNetUnfolderBase]: For 13469/13469 co-relation queries the response was YES. [2023-11-17 11:54:24,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7834 conditions, 1175 events. 643/1175 cut-off events. For 13469/13469 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6163 event pairs, 214 based on Foata normal form. 2/1177 useless extension candidates. Maximal degree in co-relation 7721. Up to 1013 conditions per place. [2023-11-17 11:54:24,459 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 168 selfloop transitions, 35 changer transitions 2/205 dead transitions. [2023-11-17 11:54:24,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 205 transitions, 2758 flow [2023-11-17 11:54:24,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:54:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:54:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 74 transitions. [2023-11-17 11:54:24,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30833333333333335 [2023-11-17 11:54:24,460 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 74 transitions. [2023-11-17 11:54:24,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 74 transitions. [2023-11-17 11:54:24,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:24,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 74 transitions. [2023-11-17 11:54:24,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:24,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:24,461 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:24,461 INFO L175 Difference]: Start difference. First operand has 222 places, 193 transitions, 2294 flow. Second operand 10 states and 74 transitions. [2023-11-17 11:54:24,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 205 transitions, 2758 flow [2023-11-17 11:54:24,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 205 transitions, 2668 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-11-17 11:54:24,499 INFO L231 Difference]: Finished difference. Result has 216 places, 191 transitions, 2247 flow [2023-11-17 11:54:24,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2247, PETRI_PLACES=216, PETRI_TRANSITIONS=191} [2023-11-17 11:54:24,499 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 194 predicate places. [2023-11-17 11:54:24,499 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 191 transitions, 2247 flow [2023-11-17 11:54:24,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 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 11:54:24,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:24,499 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:24,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-17 11:54:24,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:24,700 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:24,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 516318319, now seen corresponding path program 52 times [2023-11-17 11:54:24,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:24,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480617853] [2023-11-17 11:54:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:24,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480617853] [2023-11-17 11:54:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480617853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021514214] [2023-11-17 11:54:25,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:54:25,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:25,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:25,202 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:25,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-17 11:54:25,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:54:25,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:25,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:54:25,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:25,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:25,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:54:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:25,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:25,727 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 11:54:25,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 11:54:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:25,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021514214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:25,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:25,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-17 11:54:25,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939133512] [2023-11-17 11:54:25,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:25,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 11:54:25,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:25,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 11:54:25,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:54:25,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:25,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 191 transitions, 2247 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 11:54:25,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:25,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:25,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:26,178 INFO L124 PetriNetUnfolderBase]: 626/1136 cut-off events. [2023-11-17 11:54:26,178 INFO L125 PetriNetUnfolderBase]: For 12474/12474 co-relation queries the response was YES. [2023-11-17 11:54:26,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7629 conditions, 1136 events. 626/1136 cut-off events. For 12474/12474 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5860 event pairs, 27 based on Foata normal form. 4/1140 useless extension candidates. Maximal degree in co-relation 7517. Up to 444 conditions per place. [2023-11-17 11:54:26,188 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 126 selfloop transitions, 84 changer transitions 4/214 dead transitions. [2023-11-17 11:54:26,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 214 transitions, 2803 flow [2023-11-17 11:54:26,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 11:54:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 11:54:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 102 transitions. [2023-11-17 11:54:26,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269230769230769 [2023-11-17 11:54:26,188 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 102 transitions. [2023-11-17 11:54:26,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 102 transitions. [2023-11-17 11:54:26,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:26,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 102 transitions. [2023-11-17 11:54:26,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:26,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:26,189 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:26,189 INFO L175 Difference]: Start difference. First operand has 216 places, 191 transitions, 2247 flow. Second operand 13 states and 102 transitions. [2023-11-17 11:54:26,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 214 transitions, 2803 flow [2023-11-17 11:54:26,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 214 transitions, 2725 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-17 11:54:26,230 INFO L231 Difference]: Finished difference. Result has 217 places, 188 transitions, 2316 flow [2023-11-17 11:54:26,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2316, PETRI_PLACES=217, PETRI_TRANSITIONS=188} [2023-11-17 11:54:26,230 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 195 predicate places. [2023-11-17 11:54:26,230 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 188 transitions, 2316 flow [2023-11-17 11:54:26,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 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 11:54:26,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:26,231 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:26,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:26,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:26,437 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:26,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:26,438 INFO L85 PathProgramCache]: Analyzing trace with hash -323622700, now seen corresponding path program 53 times [2023-11-17 11:54:26,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:26,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053519355] [2023-11-17 11:54:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:26,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:27,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:27,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053519355] [2023-11-17 11:54:27,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053519355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:27,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112211296] [2023-11-17 11:54:27,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:54:27,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:27,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:27,036 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:27,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-17 11:54:27,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:54:27,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:27,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 11:54:27,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:27,556 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 11:54:27,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-11-17 11:54:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:27,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:28,065 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 11:54:28,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 96 [2023-11-17 11:54:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:28,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112211296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:28,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:28,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-17 11:54:28,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988660702] [2023-11-17 11:54:28,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:28,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:54:28,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:28,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:54:28,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:54:28,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:28,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 188 transitions, 2316 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:28,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:28,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:28,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:29,902 INFO L124 PetriNetUnfolderBase]: 1159/2120 cut-off events. [2023-11-17 11:54:29,902 INFO L125 PetriNetUnfolderBase]: For 26669/26669 co-relation queries the response was YES. [2023-11-17 11:54:29,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14809 conditions, 2120 events. 1159/2120 cut-off events. For 26669/26669 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 12839 event pairs, 142 based on Foata normal form. 16/2136 useless extension candidates. Maximal degree in co-relation 14697. Up to 703 conditions per place. [2023-11-17 11:54:29,920 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 221 selfloop transitions, 131 changer transitions 33/385 dead transitions. [2023-11-17 11:54:29,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 385 transitions, 5483 flow [2023-11-17 11:54:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 11:54:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 11:54:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 211 transitions. [2023-11-17 11:54:29,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663194444444444 [2023-11-17 11:54:29,921 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 211 transitions. [2023-11-17 11:54:29,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 211 transitions. [2023-11-17 11:54:29,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:29,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 211 transitions. [2023-11-17 11:54:29,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.791666666666666) internal successors, (211), 24 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:29,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 24.0) internal successors, (600), 25 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:29,923 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 24.0) internal successors, (600), 25 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:29,923 INFO L175 Difference]: Start difference. First operand has 217 places, 188 transitions, 2316 flow. Second operand 24 states and 211 transitions. [2023-11-17 11:54:29,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 385 transitions, 5483 flow [2023-11-17 11:54:30,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 385 transitions, 5066 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-11-17 11:54:30,048 INFO L231 Difference]: Finished difference. Result has 236 places, 248 transitions, 3428 flow [2023-11-17 11:54:30,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3428, PETRI_PLACES=236, PETRI_TRANSITIONS=248} [2023-11-17 11:54:30,048 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 214 predicate places. [2023-11-17 11:54:30,048 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 248 transitions, 3428 flow [2023-11-17 11:54:30,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:30,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:30,048 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:30,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-11-17 11:54:30,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:30,249 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:30,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:30,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1926348820, now seen corresponding path program 54 times [2023-11-17 11:54:30,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:30,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708624617] [2023-11-17 11:54:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:30,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:30,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:30,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708624617] [2023-11-17 11:54:30,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708624617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:30,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086871064] [2023-11-17 11:54:30,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:54:30,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:30,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:30,741 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:30,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-17 11:54:31,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:54:31,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:31,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 11:54:31,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:31,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:31,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:54:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:31,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:31,492 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 11:54:31,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2023-11-17 11:54:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:31,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086871064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:31,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:31,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2023-11-17 11:54:31,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205050095] [2023-11-17 11:54:31,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:31,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 11:54:31,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 11:54:31,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-17 11:54:31,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:31,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 248 transitions, 3428 flow. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 11:54:31,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:31,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:31,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:32,358 INFO L124 PetriNetUnfolderBase]: 1143/2084 cut-off events. [2023-11-17 11:54:32,359 INFO L125 PetriNetUnfolderBase]: For 30089/30089 co-relation queries the response was YES. [2023-11-17 11:54:32,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15606 conditions, 2084 events. 1143/2084 cut-off events. For 30089/30089 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 12484 event pairs, 225 based on Foata normal form. 2/2086 useless extension candidates. Maximal degree in co-relation 15480. Up to 1703 conditions per place. [2023-11-17 11:54:32,377 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 200 selfloop transitions, 76 changer transitions 4/280 dead transitions. [2023-11-17 11:54:32,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 280 transitions, 4254 flow [2023-11-17 11:54:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:54:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:54:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2023-11-17 11:54:32,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3273809523809524 [2023-11-17 11:54:32,378 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 110 transitions. [2023-11-17 11:54:32,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 110 transitions. [2023-11-17 11:54:32,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:32,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 110 transitions. [2023-11-17 11:54:32,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 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 11:54:32,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:32,379 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:32,379 INFO L175 Difference]: Start difference. First operand has 236 places, 248 transitions, 3428 flow. Second operand 14 states and 110 transitions. [2023-11-17 11:54:32,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 280 transitions, 4254 flow [2023-11-17 11:54:32,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 280 transitions, 3888 flow, removed 146 selfloop flow, removed 11 redundant places. [2023-11-17 11:54:32,521 INFO L231 Difference]: Finished difference. Result has 237 places, 254 transitions, 3346 flow [2023-11-17 11:54:32,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3346, PETRI_PLACES=237, PETRI_TRANSITIONS=254} [2023-11-17 11:54:32,522 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 215 predicate places. [2023-11-17 11:54:32,522 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 254 transitions, 3346 flow [2023-11-17 11:54:32,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 11:54:32,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:32,522 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:32,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-17 11:54:32,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-11-17 11:54:32,728 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:32,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1764674502, now seen corresponding path program 55 times [2023-11-17 11:54:32,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:32,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529978501] [2023-11-17 11:54:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:32,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:33,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:33,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529978501] [2023-11-17 11:54:33,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529978501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:33,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339221967] [2023-11-17 11:54:33,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:54:33,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:33,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:33,442 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:33,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-17 11:54:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:33,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:54:33,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:33,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:33,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:54:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:33,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:34,193 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:54:34,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:54:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:34,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339221967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:34,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:34,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-11-17 11:54:34,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374823974] [2023-11-17 11:54:34,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:34,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:54:34,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:34,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:54:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:54:34,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:34,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 254 transitions, 3346 flow. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:34,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:34,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:34,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:35,559 INFO L124 PetriNetUnfolderBase]: 1309/2392 cut-off events. [2023-11-17 11:54:35,559 INFO L125 PetriNetUnfolderBase]: For 31579/31579 co-relation queries the response was YES. [2023-11-17 11:54:35,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16819 conditions, 2392 events. 1309/2392 cut-off events. For 31579/31579 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14557 event pairs, 247 based on Foata normal form. 14/2406 useless extension candidates. Maximal degree in co-relation 16694. Up to 1833 conditions per place. [2023-11-17 11:54:35,577 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 230 selfloop transitions, 84 changer transitions 14/328 dead transitions. [2023-11-17 11:54:35,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 328 transitions, 4666 flow [2023-11-17 11:54:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 11:54:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 11:54:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 181 transitions. [2023-11-17 11:54:35,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3428030303030303 [2023-11-17 11:54:35,580 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 181 transitions. [2023-11-17 11:54:35,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 181 transitions. [2023-11-17 11:54:35,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:35,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 181 transitions. [2023-11-17 11:54:35,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 8.227272727272727) internal successors, (181), 22 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:35,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:35,581 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:35,581 INFO L175 Difference]: Start difference. First operand has 237 places, 254 transitions, 3346 flow. Second operand 22 states and 181 transitions. [2023-11-17 11:54:35,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 328 transitions, 4666 flow [2023-11-17 11:54:35,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 328 transitions, 4529 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-11-17 11:54:35,706 INFO L231 Difference]: Finished difference. Result has 255 places, 272 transitions, 3739 flow [2023-11-17 11:54:35,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3209, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3739, PETRI_PLACES=255, PETRI_TRANSITIONS=272} [2023-11-17 11:54:35,706 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 233 predicate places. [2023-11-17 11:54:35,707 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 272 transitions, 3739 flow [2023-11-17 11:54:35,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:35,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:35,707 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:35,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-11-17 11:54:35,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-11-17 11:54:35,908 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:35,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1946675206, now seen corresponding path program 56 times [2023-11-17 11:54:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:35,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853507318] [2023-11-17 11:54:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:36,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:36,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853507318] [2023-11-17 11:54:36,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853507318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:36,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647284594] [2023-11-17 11:54:36,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:54:36,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:36,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:36,553 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:36,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-17 11:54:36,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:54:36,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:36,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:54:36,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:36,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:36,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:54:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:37,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:37,326 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:54:37,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:54:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:37,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647284594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:37,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:37,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-11-17 11:54:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653009409] [2023-11-17 11:54:37,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:54:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:37,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:54:37,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:54:37,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:37,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 272 transitions, 3739 flow. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:37,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:37,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:38,667 INFO L124 PetriNetUnfolderBase]: 1406/2575 cut-off events. [2023-11-17 11:54:38,668 INFO L125 PetriNetUnfolderBase]: For 37771/37771 co-relation queries the response was YES. [2023-11-17 11:54:38,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18946 conditions, 2575 events. 1406/2575 cut-off events. For 37771/37771 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15955 event pairs, 316 based on Foata normal form. 6/2581 useless extension candidates. Maximal degree in co-relation 18815. Up to 2065 conditions per place. [2023-11-17 11:54:38,690 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 232 selfloop transitions, 90 changer transitions 7/329 dead transitions. [2023-11-17 11:54:38,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 329 transitions, 4909 flow [2023-11-17 11:54:38,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 11:54:38,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 11:54:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 176 transitions. [2023-11-17 11:54:38,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3188405797101449 [2023-11-17 11:54:38,691 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 176 transitions. [2023-11-17 11:54:38,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 176 transitions. [2023-11-17 11:54:38,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:38,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 176 transitions. [2023-11-17 11:54:38,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.6521739130434785) internal successors, (176), 23 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,692 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,692 INFO L175 Difference]: Start difference. First operand has 255 places, 272 transitions, 3739 flow. Second operand 23 states and 176 transitions. [2023-11-17 11:54:38,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 329 transitions, 4909 flow [2023-11-17 11:54:38,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 329 transitions, 4657 flow, removed 93 selfloop flow, removed 13 redundant places. [2023-11-17 11:54:38,836 INFO L231 Difference]: Finished difference. Result has 267 places, 284 transitions, 3923 flow [2023-11-17 11:54:38,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3923, PETRI_PLACES=267, PETRI_TRANSITIONS=284} [2023-11-17 11:54:38,836 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 245 predicate places. [2023-11-17 11:54:38,837 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 284 transitions, 3923 flow [2023-11-17 11:54:38,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:38,837 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:38,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-11-17 11:54:39,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:39,037 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:39,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash -320336420, now seen corresponding path program 57 times [2023-11-17 11:54:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:39,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584792619] [2023-11-17 11:54:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:39,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:39,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:39,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584792619] [2023-11-17 11:54:39,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584792619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:39,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476095152] [2023-11-17 11:54:39,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:54:39,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:39,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:39,508 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:39,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-17 11:54:39,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:54:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:39,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:54:39,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:39,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:39,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:54:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:40,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:40,365 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 11:54:40,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2023-11-17 11:54:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:40,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476095152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:40,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:40,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-11-17 11:54:40,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037131403] [2023-11-17 11:54:40,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:40,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:54:40,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:40,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:54:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:54:40,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:40,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 284 transitions, 3923 flow. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:40,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:40,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:40,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:41,601 INFO L124 PetriNetUnfolderBase]: 1467/2684 cut-off events. [2023-11-17 11:54:41,601 INFO L125 PetriNetUnfolderBase]: For 37838/37838 co-relation queries the response was YES. [2023-11-17 11:54:41,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19405 conditions, 2684 events. 1467/2684 cut-off events. For 37838/37838 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 16819 event pairs, 380 based on Foata normal form. 2/2678 useless extension candidates. Maximal degree in co-relation 19271. Up to 2498 conditions per place. [2023-11-17 11:54:41,624 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 291 selfloop transitions, 53 changer transitions 3/347 dead transitions. [2023-11-17 11:54:41,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 347 transitions, 5185 flow [2023-11-17 11:54:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 11:54:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 11:54:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 160 transitions. [2023-11-17 11:54:41,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31746031746031744 [2023-11-17 11:54:41,625 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 160 transitions. [2023-11-17 11:54:41,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 160 transitions. [2023-11-17 11:54:41,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:41,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 160 transitions. [2023-11-17 11:54:41,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:41,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 24.0) internal successors, (528), 22 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:41,626 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 24.0) internal successors, (528), 22 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:41,626 INFO L175 Difference]: Start difference. First operand has 267 places, 284 transitions, 3923 flow. Second operand 21 states and 160 transitions. [2023-11-17 11:54:41,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 347 transitions, 5185 flow [2023-11-17 11:54:41,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 347 transitions, 5025 flow, removed 42 selfloop flow, removed 15 redundant places. [2023-11-17 11:54:41,777 INFO L231 Difference]: Finished difference. Result has 278 places, 307 transitions, 4278 flow [2023-11-17 11:54:41,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3767, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4278, PETRI_PLACES=278, PETRI_TRANSITIONS=307} [2023-11-17 11:54:41,777 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 256 predicate places. [2023-11-17 11:54:41,778 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 307 transitions, 4278 flow [2023-11-17 11:54:41,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:41,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:41,778 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:41,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:41,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:41,978 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:41,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:41,979 INFO L85 PathProgramCache]: Analyzing trace with hash 457161602, now seen corresponding path program 58 times [2023-11-17 11:54:41,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:41,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932509698] [2023-11-17 11:54:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:41,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:42,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:42,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932509698] [2023-11-17 11:54:42,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932509698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:42,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908160010] [2023-11-17 11:54:42,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:54:42,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:42,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:42,650 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:42,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-17 11:54:42,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:54:42,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:42,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:54:42,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:43,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:43,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:54:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:43,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:43,497 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 11:54:43,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2023-11-17 11:54:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:43,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908160010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:43,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:43,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-11-17 11:54:43,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568726896] [2023-11-17 11:54:43,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:43,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:54:43,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:43,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:54:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:54:43,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:43,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 307 transitions, 4278 flow. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:43,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:43,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:43,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:44,881 INFO L124 PetriNetUnfolderBase]: 1547/2821 cut-off events. [2023-11-17 11:54:44,882 INFO L125 PetriNetUnfolderBase]: For 41917/41917 co-relation queries the response was YES. [2023-11-17 11:54:44,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20791 conditions, 2821 events. 1547/2821 cut-off events. For 41917/41917 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 17731 event pairs, 397 based on Foata normal form. 3/2816 useless extension candidates. Maximal degree in co-relation 20651. Up to 2633 conditions per place. [2023-11-17 11:54:44,908 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 306 selfloop transitions, 49 changer transitions 3/358 dead transitions. [2023-11-17 11:54:44,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 358 transitions, 5595 flow [2023-11-17 11:54:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 11:54:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 11:54:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2023-11-17 11:54:44,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31798245614035087 [2023-11-17 11:54:44,909 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 145 transitions. [2023-11-17 11:54:44,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 145 transitions. [2023-11-17 11:54:44,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:44,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 145 transitions. [2023-11-17 11:54:44,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:44,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:44,910 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:44,910 INFO L175 Difference]: Start difference. First operand has 278 places, 307 transitions, 4278 flow. Second operand 19 states and 145 transitions. [2023-11-17 11:54:44,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 358 transitions, 5595 flow [2023-11-17 11:54:45,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 358 transitions, 5386 flow, removed 84 selfloop flow, removed 10 redundant places. [2023-11-17 11:54:45,106 INFO L231 Difference]: Finished difference. Result has 292 places, 324 transitions, 4565 flow [2023-11-17 11:54:45,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4565, PETRI_PLACES=292, PETRI_TRANSITIONS=324} [2023-11-17 11:54:45,107 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 270 predicate places. [2023-11-17 11:54:45,107 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 324 transitions, 4565 flow [2023-11-17 11:54:45,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:45,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:45,107 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:45,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-17 11:54:45,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-17 11:54:45,310 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:45,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:45,310 INFO L85 PathProgramCache]: Analyzing trace with hash -132727336, now seen corresponding path program 59 times [2023-11-17 11:54:45,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:45,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358924466] [2023-11-17 11:54:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:45,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:45,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:45,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358924466] [2023-11-17 11:54:45,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358924466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:45,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795702719] [2023-11-17 11:54:45,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:54:45,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:45,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:45,895 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:45,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-17 11:54:46,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:54:46,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:46,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 11:54:46,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:46,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:46,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2023-11-17 11:54:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:46,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:46,647 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:54:46,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:54:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:46,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795702719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:46,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:46,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-11-17 11:54:46,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302231447] [2023-11-17 11:54:46,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:46,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 11:54:46,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:46,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 11:54:46,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2023-11-17 11:54:46,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:46,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 324 transitions, 4565 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:46,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:46,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:46,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:47,965 INFO L124 PetriNetUnfolderBase]: 1596/2913 cut-off events. [2023-11-17 11:54:47,965 INFO L125 PetriNetUnfolderBase]: For 51371/51371 co-relation queries the response was YES. [2023-11-17 11:54:47,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22385 conditions, 2913 events. 1596/2913 cut-off events. For 51371/51371 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 18483 event pairs, 399 based on Foata normal form. 2/2907 useless extension candidates. Maximal degree in co-relation 22240. Up to 2691 conditions per place. [2023-11-17 11:54:47,991 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 320 selfloop transitions, 54 changer transitions 5/379 dead transitions. [2023-11-17 11:54:47,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 379 transitions, 5943 flow [2023-11-17 11:54:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:54:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:54:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 160 transitions. [2023-11-17 11:54:47,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:54:47,993 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 160 transitions. [2023-11-17 11:54:47,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 160 transitions. [2023-11-17 11:54:47,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:47,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 160 transitions. [2023-11-17 11:54:47,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.0) internal successors, (160), 20 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:47,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:47,994 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:47,994 INFO L175 Difference]: Start difference. First operand has 292 places, 324 transitions, 4565 flow. Second operand 20 states and 160 transitions. [2023-11-17 11:54:47,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 379 transitions, 5943 flow [2023-11-17 11:54:48,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 379 transitions, 5620 flow, removed 149 selfloop flow, removed 9 redundant places. [2023-11-17 11:54:48,205 INFO L231 Difference]: Finished difference. Result has 306 places, 337 transitions, 4694 flow [2023-11-17 11:54:48,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4290, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4694, PETRI_PLACES=306, PETRI_TRANSITIONS=337} [2023-11-17 11:54:48,205 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 284 predicate places. [2023-11-17 11:54:48,205 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 337 transitions, 4694 flow [2023-11-17 11:54:48,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:48,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:48,206 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:48,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:48,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-17 11:54:48,406 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:48,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:48,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1362144008, now seen corresponding path program 60 times [2023-11-17 11:54:48,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:48,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280090005] [2023-11-17 11:54:48,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:48,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:49,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:49,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280090005] [2023-11-17 11:54:49,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280090005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:49,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671743519] [2023-11-17 11:54:49,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:54:49,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:49,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:49,022 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:49,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-17 11:54:49,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:54:49,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:49,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 11:54:49,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:49,506 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:49,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:54:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:49,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:49,882 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 11:54:49,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2023-11-17 11:54:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671743519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:49,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:49,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2023-11-17 11:54:49,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54066410] [2023-11-17 11:54:49,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:49,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 11:54:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:49,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 11:54:49,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-11-17 11:54:49,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:49,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 337 transitions, 4694 flow. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 11:54:49,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:49,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:49,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:51,198 INFO L124 PetriNetUnfolderBase]: 1600/2930 cut-off events. [2023-11-17 11:54:51,198 INFO L125 PetriNetUnfolderBase]: For 52869/52869 co-relation queries the response was YES. [2023-11-17 11:54:51,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22347 conditions, 2930 events. 1600/2930 cut-off events. For 52869/52869 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 18703 event pairs, 413 based on Foata normal form. 3/2919 useless extension candidates. Maximal degree in co-relation 22197. Up to 2709 conditions per place. [2023-11-17 11:54:51,227 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 319 selfloop transitions, 50 changer transitions 4/373 dead transitions. [2023-11-17 11:54:51,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 373 transitions, 5804 flow [2023-11-17 11:54:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 11:54:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 11:54:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2023-11-17 11:54:51,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31798245614035087 [2023-11-17 11:54:51,228 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 145 transitions. [2023-11-17 11:54:51,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 145 transitions. [2023-11-17 11:54:51,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:51,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 145 transitions. [2023-11-17 11:54:51,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:51,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:51,229 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:51,229 INFO L175 Difference]: Start difference. First operand has 306 places, 337 transitions, 4694 flow. Second operand 19 states and 145 transitions. [2023-11-17 11:54:51,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 373 transitions, 5804 flow [2023-11-17 11:54:51,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 373 transitions, 5643 flow, removed 58 selfloop flow, removed 11 redundant places. [2023-11-17 11:54:51,427 INFO L231 Difference]: Finished difference. Result has 316 places, 338 transitions, 4696 flow [2023-11-17 11:54:51,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4696, PETRI_PLACES=316, PETRI_TRANSITIONS=338} [2023-11-17 11:54:51,427 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 294 predicate places. [2023-11-17 11:54:51,428 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 338 transitions, 4696 flow [2023-11-17 11:54:51,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 11:54:51,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:51,428 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:51,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-11-17 11:54:51,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:51,628 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:51,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1274526888, now seen corresponding path program 61 times [2023-11-17 11:54:51,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:51,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582038191] [2023-11-17 11:54:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:51,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 11:54:52,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582038191] [2023-11-17 11:54:52,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582038191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521111600] [2023-11-17 11:54:52,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:54:52,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:52,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:52,577 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:52,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-17 11:54:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:52,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-17 11:54:52,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:53,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:53,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:54:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:53,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:53,661 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 11:54:53,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 122 [2023-11-17 11:54:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:53,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521111600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:53,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:53,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 9] total 36 [2023-11-17 11:54:53,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972183470] [2023-11-17 11:54:53,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:53,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 11:54:53,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:53,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 11:54:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2023-11-17 11:54:53,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:53,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 338 transitions, 4696 flow. Second operand has 37 states, 37 states have (on average 4.702702702702703) internal successors, (174), 37 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:53,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:53,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:53,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:57,025 INFO L124 PetriNetUnfolderBase]: 1680/3122 cut-off events. [2023-11-17 11:54:57,025 INFO L125 PetriNetUnfolderBase]: For 60279/60279 co-relation queries the response was YES. [2023-11-17 11:54:57,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24159 conditions, 3122 events. 1680/3122 cut-off events. For 60279/60279 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 20576 event pairs, 410 based on Foata normal form. 11/3125 useless extension candidates. Maximal degree in co-relation 24006. Up to 2685 conditions per place. [2023-11-17 11:54:57,055 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 341 selfloop transitions, 83 changer transitions 22/446 dead transitions. [2023-11-17 11:54:57,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 446 transitions, 6764 flow [2023-11-17 11:54:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 11:54:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 11:54:57,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 242 transitions. [2023-11-17 11:54:57,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33611111111111114 [2023-11-17 11:54:57,056 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 242 transitions. [2023-11-17 11:54:57,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 242 transitions. [2023-11-17 11:54:57,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:57,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 242 transitions. [2023-11-17 11:54:57,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 8.066666666666666) internal successors, (242), 30 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:57,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 24.0) internal successors, (744), 31 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:57,058 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 24.0) internal successors, (744), 31 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:57,058 INFO L175 Difference]: Start difference. First operand has 316 places, 338 transitions, 4696 flow. Second operand 30 states and 242 transitions. [2023-11-17 11:54:57,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 446 transitions, 6764 flow [2023-11-17 11:54:57,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 446 transitions, 6645 flow, removed 16 selfloop flow, removed 17 redundant places. [2023-11-17 11:54:57,289 INFO L231 Difference]: Finished difference. Result has 340 places, 363 transitions, 5394 flow [2023-11-17 11:54:57,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5394, PETRI_PLACES=340, PETRI_TRANSITIONS=363} [2023-11-17 11:54:57,290 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 318 predicate places. [2023-11-17 11:54:57,290 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 363 transitions, 5394 flow [2023-11-17 11:54:57,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.702702702702703) internal successors, (174), 37 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:57,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:57,290 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:57,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-11-17 11:54:57,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-11-17 11:54:57,491 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:54:57,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1934057315, now seen corresponding path program 62 times [2023-11-17 11:54:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:57,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208438558] [2023-11-17 11:54:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:54:57,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:57,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208438558] [2023-11-17 11:54:57,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208438558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:57,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560718107] [2023-11-17 11:54:57,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:54:57,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:57,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:57,939 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:57,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-17 11:54:58,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:54:58,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:58,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:54:58,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:58,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:58,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:54:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:54:58,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:58,503 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:54:58,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:54:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:54:58,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560718107] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:58,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:58,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 19 [2023-11-17 11:54:58,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383220353] [2023-11-17 11:54:58,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:58,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 11:54:58,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:58,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 11:54:58,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:54:58,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:54:58,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 363 transitions, 5394 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:58,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:58,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:54:58,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:59,415 INFO L124 PetriNetUnfolderBase]: 1672/3099 cut-off events. [2023-11-17 11:54:59,416 INFO L125 PetriNetUnfolderBase]: For 79429/79429 co-relation queries the response was YES. [2023-11-17 11:54:59,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25772 conditions, 3099 events. 1672/3099 cut-off events. For 79429/79429 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20316 event pairs, 739 based on Foata normal form. 18/3109 useless extension candidates. Maximal degree in co-relation 25602. Up to 2960 conditions per place. [2023-11-17 11:54:59,452 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 350 selfloop transitions, 28 changer transitions 0/378 dead transitions. [2023-11-17 11:54:59,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 378 transitions, 6329 flow [2023-11-17 11:54:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:54:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:54:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2023-11-17 11:54:59,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:54:59,453 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 72 transitions. [2023-11-17 11:54:59,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 72 transitions. [2023-11-17 11:54:59,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:59,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 72 transitions. [2023-11-17 11:54:59,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:59,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:59,454 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:59,454 INFO L175 Difference]: Start difference. First operand has 340 places, 363 transitions, 5394 flow. Second operand 9 states and 72 transitions. [2023-11-17 11:54:59,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 378 transitions, 6329 flow [2023-11-17 11:54:59,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 378 transitions, 5857 flow, removed 196 selfloop flow, removed 23 redundant places. [2023-11-17 11:54:59,793 INFO L231 Difference]: Finished difference. Result has 324 places, 362 transitions, 4998 flow [2023-11-17 11:54:59,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4998, PETRI_PLACES=324, PETRI_TRANSITIONS=362} [2023-11-17 11:54:59,793 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 302 predicate places. [2023-11-17 11:54:59,794 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 362 transitions, 4998 flow [2023-11-17 11:54:59,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:59,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:59,794 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:59,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-11-17 11:55:00,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:00,001 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:00,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:00,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1086151864, now seen corresponding path program 63 times [2023-11-17 11:55:00,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:00,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660004932] [2023-11-17 11:55:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:00,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:55:00,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660004932] [2023-11-17 11:55:00,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660004932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334804724] [2023-11-17 11:55:00,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:55:00,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:00,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:00,937 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:00,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-17 11:55:01,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 11:55:01,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:01,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 11:55:01,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:01,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:01,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:55:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:01,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:01,756 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:55:01,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:55:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:01,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334804724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:01,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:01,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 34 [2023-11-17 11:55:01,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747233658] [2023-11-17 11:55:01,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:01,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 11:55:01,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 11:55:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 11:55:01,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:01,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 362 transitions, 4998 flow. Second operand has 35 states, 35 states have (on average 4.828571428571428) internal successors, (169), 35 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:01,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:01,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:03,721 INFO L124 PetriNetUnfolderBase]: 1684/3129 cut-off events. [2023-11-17 11:55:03,721 INFO L125 PetriNetUnfolderBase]: For 73369/73369 co-relation queries the response was YES. [2023-11-17 11:55:03,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25042 conditions, 3129 events. 1684/3129 cut-off events. For 73369/73369 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 20621 event pairs, 435 based on Foata normal form. 2/3123 useless extension candidates. Maximal degree in co-relation 24884. Up to 2891 conditions per place. [2023-11-17 11:55:03,748 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 340 selfloop transitions, 59 changer transitions 6/405 dead transitions. [2023-11-17 11:55:03,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 405 transitions, 6202 flow [2023-11-17 11:55:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 11:55:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 11:55:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 171 transitions. [2023-11-17 11:55:03,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.296875 [2023-11-17 11:55:03,749 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 171 transitions. [2023-11-17 11:55:03,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 171 transitions. [2023-11-17 11:55:03,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:03,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 171 transitions. [2023-11-17 11:55:03,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.125) internal successors, (171), 24 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:03,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 24.0) internal successors, (600), 25 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:03,751 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 24.0) internal successors, (600), 25 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:03,751 INFO L175 Difference]: Start difference. First operand has 324 places, 362 transitions, 4998 flow. Second operand 24 states and 171 transitions. [2023-11-17 11:55:03,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 405 transitions, 6202 flow [2023-11-17 11:55:04,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 405 transitions, 6131 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-17 11:55:04,019 INFO L231 Difference]: Finished difference. Result has 343 places, 366 transitions, 5178 flow [2023-11-17 11:55:04,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5178, PETRI_PLACES=343, PETRI_TRANSITIONS=366} [2023-11-17 11:55:04,020 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 321 predicate places. [2023-11-17 11:55:04,020 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 366 transitions, 5178 flow [2023-11-17 11:55:04,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.828571428571428) internal successors, (169), 35 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:04,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:04,020 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:04,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-11-17 11:55:04,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:04,227 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:04,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:04,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1396682581, now seen corresponding path program 64 times [2023-11-17 11:55:04,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:04,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023032112] [2023-11-17 11:55:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:04,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:55:04,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:04,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023032112] [2023-11-17 11:55:04,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023032112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:04,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745275061] [2023-11-17 11:55:04,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:55:04,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:04,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:04,689 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:04,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-17 11:55:05,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:55:05,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:05,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:55:05,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:05,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:05,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:55:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:55:05,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:05,216 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:55:05,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:55:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:55:05,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745275061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:05,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:05,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-11-17 11:55:05,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323112888] [2023-11-17 11:55:05,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:05,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 11:55:05,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:05,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 11:55:05,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:55:05,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:05,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 366 transitions, 5178 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:05,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:05,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:05,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:06,170 INFO L124 PetriNetUnfolderBase]: 1677/3104 cut-off events. [2023-11-17 11:55:06,170 INFO L125 PetriNetUnfolderBase]: For 77516/77516 co-relation queries the response was YES. [2023-11-17 11:55:06,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25160 conditions, 3104 events. 1677/3104 cut-off events. For 77516/77516 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 20312 event pairs, 755 based on Foata normal form. 2/3098 useless extension candidates. Maximal degree in co-relation 25025. Up to 2990 conditions per place. [2023-11-17 11:55:06,209 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 350 selfloop transitions, 27 changer transitions 2/379 dead transitions. [2023-11-17 11:55:06,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 379 transitions, 6029 flow [2023-11-17 11:55:06,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:55:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:55:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 74 transitions. [2023-11-17 11:55:06,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30833333333333335 [2023-11-17 11:55:06,210 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 74 transitions. [2023-11-17 11:55:06,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 74 transitions. [2023-11-17 11:55:06,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:06,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 74 transitions. [2023-11-17 11:55:06,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:06,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:06,211 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:06,211 INFO L175 Difference]: Start difference. First operand has 343 places, 366 transitions, 5178 flow. Second operand 10 states and 74 transitions. [2023-11-17 11:55:06,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 379 transitions, 6029 flow [2023-11-17 11:55:06,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 379 transitions, 5856 flow, removed 50 selfloop flow, removed 21 redundant places. [2023-11-17 11:55:06,517 INFO L231 Difference]: Finished difference. Result has 330 places, 363 transitions, 5007 flow [2023-11-17 11:55:06,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5007, PETRI_PLACES=330, PETRI_TRANSITIONS=363} [2023-11-17 11:55:06,518 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 308 predicate places. [2023-11-17 11:55:06,518 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 363 transitions, 5007 flow [2023-11-17 11:55:06,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:06,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:06,518 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:06,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-11-17 11:55:06,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-11-17 11:55:06,719 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:06,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash 618117506, now seen corresponding path program 65 times [2023-11-17 11:55:06,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:06,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029855724] [2023-11-17 11:55:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:06,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:07,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:07,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029855724] [2023-11-17 11:55:07,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029855724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:07,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221480960] [2023-11-17 11:55:07,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:55:07,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:07,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:07,465 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:07,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-11-17 11:55:07,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:55:07,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:07,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 11:55:07,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:08,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:55:08,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:55:08,040 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:55:08,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-17 11:55:08,254 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 11:55:08,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2023-11-17 11:55:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:08,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:08,867 INFO L349 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2023-11-17 11:55:08,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 607 treesize of output 440 [2023-11-17 11:55:08,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:08,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 373 [2023-11-17 11:55:08,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:08,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 364 treesize of output 341 [2023-11-17 11:55:08,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:08,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 309 [2023-11-17 11:55:08,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:08,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 293 [2023-11-17 11:55:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:12,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221480960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:12,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:12,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-11-17 11:55:12,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870371122] [2023-11-17 11:55:12,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:12,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 11:55:12,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 11:55:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1204, Unknown=6, NotChecked=0, Total=1332 [2023-11-17 11:55:12,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:12,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 363 transitions, 5007 flow. Second operand has 37 states, 37 states have (on average 4.621621621621622) internal successors, (171), 37 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:12,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:12,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:12,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:15,504 INFO L124 PetriNetUnfolderBase]: 1815/3363 cut-off events. [2023-11-17 11:55:15,504 INFO L125 PetriNetUnfolderBase]: For 82893/82893 co-relation queries the response was YES. [2023-11-17 11:55:15,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27131 conditions, 3363 events. 1815/3363 cut-off events. For 82893/82893 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22524 event pairs, 232 based on Foata normal form. 13/3368 useless extension candidates. Maximal degree in co-relation 26971. Up to 997 conditions per place. [2023-11-17 11:55:15,541 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 277 selfloop transitions, 206 changer transitions 35/518 dead transitions. [2023-11-17 11:55:15,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 518 transitions, 8080 flow [2023-11-17 11:55:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 11:55:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 11:55:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 199 transitions. [2023-11-17 11:55:15,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3605072463768116 [2023-11-17 11:55:15,542 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 199 transitions. [2023-11-17 11:55:15,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 199 transitions. [2023-11-17 11:55:15,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:15,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 199 transitions. [2023-11-17 11:55:15,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 8.652173913043478) internal successors, (199), 23 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:15,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:15,544 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:15,544 INFO L175 Difference]: Start difference. First operand has 330 places, 363 transitions, 5007 flow. Second operand 23 states and 199 transitions. [2023-11-17 11:55:15,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 518 transitions, 8080 flow [2023-11-17 11:55:16,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 518 transitions, 8022 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-17 11:55:16,014 INFO L231 Difference]: Finished difference. Result has 353 places, 393 transitions, 6058 flow [2023-11-17 11:55:16,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4951, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6058, PETRI_PLACES=353, PETRI_TRANSITIONS=393} [2023-11-17 11:55:16,014 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 331 predicate places. [2023-11-17 11:55:16,015 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 393 transitions, 6058 flow [2023-11-17 11:55:16,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.621621621621622) internal successors, (171), 37 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:16,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:16,015 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:16,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-11-17 11:55:16,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:16,383 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:16,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2026449594, now seen corresponding path program 66 times [2023-11-17 11:55:16,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:16,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362001661] [2023-11-17 11:55:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:16,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362001661] [2023-11-17 11:55:16,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362001661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:16,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151886556] [2023-11-17 11:55:16,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:55:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:16,942 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:16,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-11-17 11:55:17,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:55:17,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:17,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 11:55:17,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:17,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:17,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:55:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:17,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:17,684 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:55:17,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:55:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:17,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151886556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:17,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:17,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2023-11-17 11:55:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987627347] [2023-11-17 11:55:17,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:17,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 11:55:17,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 11:55:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-11-17 11:55:17,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:17,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 393 transitions, 6058 flow. Second operand has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 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 11:55:17,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:17,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:17,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:19,244 INFO L124 PetriNetUnfolderBase]: 1849/3410 cut-off events. [2023-11-17 11:55:19,244 INFO L125 PetriNetUnfolderBase]: For 103426/103426 co-relation queries the response was YES. [2023-11-17 11:55:19,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30005 conditions, 3410 events. 1849/3410 cut-off events. For 103426/103426 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22693 event pairs, 621 based on Foata normal form. 2/3404 useless extension candidates. Maximal degree in co-relation 29833. Up to 3011 conditions per place. [2023-11-17 11:55:19,284 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 376 selfloop transitions, 73 changer transitions 5/454 dead transitions. [2023-11-17 11:55:19,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 454 transitions, 7933 flow [2023-11-17 11:55:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 11:55:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 11:55:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 152 transitions. [2023-11-17 11:55:19,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:55:19,285 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 152 transitions. [2023-11-17 11:55:19,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 152 transitions. [2023-11-17 11:55:19,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:19,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 152 transitions. [2023-11-17 11:55:19,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.0) internal successors, (152), 19 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:19,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:19,286 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:19,286 INFO L175 Difference]: Start difference. First operand has 353 places, 393 transitions, 6058 flow. Second operand 19 states and 152 transitions. [2023-11-17 11:55:19,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 454 transitions, 7933 flow [2023-11-17 11:55:19,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 454 transitions, 7537 flow, removed 148 selfloop flow, removed 13 redundant places. [2023-11-17 11:55:19,706 INFO L231 Difference]: Finished difference. Result has 358 places, 407 transitions, 6259 flow [2023-11-17 11:55:19,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5684, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6259, PETRI_PLACES=358, PETRI_TRANSITIONS=407} [2023-11-17 11:55:19,707 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 336 predicate places. [2023-11-17 11:55:19,707 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 407 transitions, 6259 flow [2023-11-17 11:55:19,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 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 11:55:19,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:19,707 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:19,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-11-17 11:55:19,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:19,907 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:19,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash 100498604, now seen corresponding path program 67 times [2023-11-17 11:55:19,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:19,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783461225] [2023-11-17 11:55:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:19,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:20,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:20,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783461225] [2023-11-17 11:55:20,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783461225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:20,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654925987] [2023-11-17 11:55:20,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:55:20,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:20,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:20,460 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:20,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-11-17 11:55:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:20,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:55:20,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:20,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:20,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:55:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:20,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:21,244 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:55:21,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:55:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:21,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654925987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:21,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:21,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-11-17 11:55:21,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392665441] [2023-11-17 11:55:21,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:21,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:55:21,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:55:21,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:55:21,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:21,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 407 transitions, 6259 flow. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:21,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:21,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:21,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:22,944 INFO L124 PetriNetUnfolderBase]: 1935/3572 cut-off events. [2023-11-17 11:55:22,944 INFO L125 PetriNetUnfolderBase]: For 115380/115380 co-relation queries the response was YES. [2023-11-17 11:55:22,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32007 conditions, 3572 events. 1935/3572 cut-off events. For 115380/115380 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23939 event pairs, 653 based on Foata normal form. 4/3564 useless extension candidates. Maximal degree in co-relation 31836. Up to 3153 conditions per place. [2023-11-17 11:55:22,985 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 397 selfloop transitions, 71 changer transitions 5/473 dead transitions. [2023-11-17 11:55:22,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 473 transitions, 8192 flow [2023-11-17 11:55:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 11:55:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 11:55:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 159 transitions. [2023-11-17 11:55:22,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34868421052631576 [2023-11-17 11:55:22,986 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 159 transitions. [2023-11-17 11:55:22,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 159 transitions. [2023-11-17 11:55:22,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:22,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 159 transitions. [2023-11-17 11:55:22,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:22,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:22,987 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:22,987 INFO L175 Difference]: Start difference. First operand has 358 places, 407 transitions, 6259 flow. Second operand 19 states and 159 transitions. [2023-11-17 11:55:22,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 473 transitions, 8192 flow [2023-11-17 11:55:23,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 473 transitions, 7909 flow, removed 108 selfloop flow, removed 10 redundant places. [2023-11-17 11:55:23,650 INFO L231 Difference]: Finished difference. Result has 371 places, 422 transitions, 6567 flow [2023-11-17 11:55:23,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6567, PETRI_PLACES=371, PETRI_TRANSITIONS=422} [2023-11-17 11:55:23,650 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 349 predicate places. [2023-11-17 11:55:23,650 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 422 transitions, 6567 flow [2023-11-17 11:55:23,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:23,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:23,651 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:23,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-11-17 11:55:23,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:23,857 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:23,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1066416114, now seen corresponding path program 68 times [2023-11-17 11:55:23,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:23,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388920148] [2023-11-17 11:55:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:23,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:24,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:24,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388920148] [2023-11-17 11:55:24,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388920148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:24,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665062982] [2023-11-17 11:55:24,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:55:24,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:24,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:24,467 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:24,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-11-17 11:55:24,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:55:24,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:24,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:55:24,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:24,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:24,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:55:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:24,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:25,283 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 11:55:25,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2023-11-17 11:55:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:25,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665062982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:25,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:25,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-11-17 11:55:25,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312700955] [2023-11-17 11:55:25,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:25,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:55:25,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:55:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:55:25,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:25,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 422 transitions, 6567 flow. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:25,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:25,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:25,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:26,772 INFO L124 PetriNetUnfolderBase]: 1963/3621 cut-off events. [2023-11-17 11:55:26,772 INFO L125 PetriNetUnfolderBase]: For 120922/120922 co-relation queries the response was YES. [2023-11-17 11:55:26,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32864 conditions, 3621 events. 1963/3621 cut-off events. For 120922/120922 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24397 event pairs, 526 based on Foata normal form. 1/3610 useless extension candidates. Maximal degree in co-relation 32688. Up to 2550 conditions per place. [2023-11-17 11:55:26,815 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 328 selfloop transitions, 129 changer transitions 1/458 dead transitions. [2023-11-17 11:55:26,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 458 transitions, 8101 flow [2023-11-17 11:55:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:55:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:55:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 107 transitions. [2023-11-17 11:55:26,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31845238095238093 [2023-11-17 11:55:26,817 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 107 transitions. [2023-11-17 11:55:26,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 107 transitions. [2023-11-17 11:55:26,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:26,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 107 transitions. [2023-11-17 11:55:26,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:26,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:26,818 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:26,818 INFO L175 Difference]: Start difference. First operand has 371 places, 422 transitions, 6567 flow. Second operand 14 states and 107 transitions. [2023-11-17 11:55:26,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 458 transitions, 8101 flow [2023-11-17 11:55:27,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 458 transitions, 7789 flow, removed 124 selfloop flow, removed 9 redundant places. [2023-11-17 11:55:27,301 INFO L231 Difference]: Finished difference. Result has 379 places, 434 transitions, 6931 flow [2023-11-17 11:55:27,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6255, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6931, PETRI_PLACES=379, PETRI_TRANSITIONS=434} [2023-11-17 11:55:27,302 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 357 predicate places. [2023-11-17 11:55:27,302 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 434 transitions, 6931 flow [2023-11-17 11:55:27,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:27,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:27,302 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:27,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-11-17 11:55:27,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-11-17 11:55:27,502 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:27,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:27,503 INFO L85 PathProgramCache]: Analyzing trace with hash -192675434, now seen corresponding path program 69 times [2023-11-17 11:55:27,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:27,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362107109] [2023-11-17 11:55:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:27,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:28,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:28,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362107109] [2023-11-17 11:55:28,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362107109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:28,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253694210] [2023-11-17 11:55:28,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:55:28,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:28,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:28,125 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:28,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-11-17 11:55:28,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:55:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:28,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:55:28,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:28,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:28,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:55:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:28,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:29,080 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 11:55:29,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2023-11-17 11:55:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:29,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253694210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:29,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:29,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-11-17 11:55:29,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529314550] [2023-11-17 11:55:29,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:29,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:55:29,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:29,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:55:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:55:29,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:29,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 434 transitions, 6931 flow. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:29,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:29,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:29,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:30,709 INFO L124 PetriNetUnfolderBase]: 1966/3633 cut-off events. [2023-11-17 11:55:30,710 INFO L125 PetriNetUnfolderBase]: For 126779/126779 co-relation queries the response was YES. [2023-11-17 11:55:30,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33545 conditions, 3633 events. 1966/3633 cut-off events. For 126779/126779 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24544 event pairs, 532 based on Foata normal form. 1/3618 useless extension candidates. Maximal degree in co-relation 33365. Up to 2550 conditions per place. [2023-11-17 11:55:30,754 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 329 selfloop transitions, 130 changer transitions 2/461 dead transitions. [2023-11-17 11:55:30,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 461 transitions, 8192 flow [2023-11-17 11:55:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:55:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:55:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 107 transitions. [2023-11-17 11:55:30,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31845238095238093 [2023-11-17 11:55:30,754 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 107 transitions. [2023-11-17 11:55:30,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 107 transitions. [2023-11-17 11:55:30,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:30,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 107 transitions. [2023-11-17 11:55:30,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:30,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:30,755 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:30,755 INFO L175 Difference]: Start difference. First operand has 379 places, 434 transitions, 6931 flow. Second operand 14 states and 107 transitions. [2023-11-17 11:55:30,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 461 transitions, 8192 flow [2023-11-17 11:55:31,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 461 transitions, 7727 flow, removed 154 selfloop flow, removed 8 redundant places. [2023-11-17 11:55:31,316 INFO L231 Difference]: Finished difference. Result has 387 places, 436 transitions, 6807 flow [2023-11-17 11:55:31,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6466, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6807, PETRI_PLACES=387, PETRI_TRANSITIONS=436} [2023-11-17 11:55:31,317 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 365 predicate places. [2023-11-17 11:55:31,317 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 436 transitions, 6807 flow [2023-11-17 11:55:31,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:31,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:31,317 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:31,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-11-17 11:55:31,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:31,520 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:31,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1650430642, now seen corresponding path program 70 times [2023-11-17 11:55:31,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:31,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758980301] [2023-11-17 11:55:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:31,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:32,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:32,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758980301] [2023-11-17 11:55:32,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758980301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:32,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502149433] [2023-11-17 11:55:32,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:55:32,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:32,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:32,152 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:32,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-11-17 11:55:32,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:55:32,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:32,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:55:32,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:32,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:32,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:55:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:32,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:32,972 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:55:32,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:55:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:33,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502149433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:33,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:33,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-11-17 11:55:33,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583009806] [2023-11-17 11:55:33,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:33,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:55:33,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:33,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:55:33,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:55:33,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:33,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 436 transitions, 6807 flow. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:33,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:33,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:33,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:34,824 INFO L124 PetriNetUnfolderBase]: 2047/3781 cut-off events. [2023-11-17 11:55:34,825 INFO L125 PetriNetUnfolderBase]: For 139415/139415 co-relation queries the response was YES. [2023-11-17 11:55:34,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35749 conditions, 3781 events. 2047/3781 cut-off events. For 139415/139415 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25668 event pairs, 526 based on Foata normal form. 6/3765 useless extension candidates. Maximal degree in co-relation 35566. Up to 2563 conditions per place. [2023-11-17 11:55:34,878 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 354 selfloop transitions, 146 changer transitions 8/508 dead transitions. [2023-11-17 11:55:34,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 508 transitions, 9067 flow [2023-11-17 11:55:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 11:55:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 11:55:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 181 transitions. [2023-11-17 11:55:34,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3428030303030303 [2023-11-17 11:55:34,879 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 181 transitions. [2023-11-17 11:55:34,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 181 transitions. [2023-11-17 11:55:34,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:34,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 181 transitions. [2023-11-17 11:55:34,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 8.227272727272727) internal successors, (181), 22 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:34,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:34,881 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:34,881 INFO L175 Difference]: Start difference. First operand has 387 places, 436 transitions, 6807 flow. Second operand 22 states and 181 transitions. [2023-11-17 11:55:34,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 508 transitions, 9067 flow [2023-11-17 11:55:35,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 508 transitions, 8759 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-11-17 11:55:35,465 INFO L231 Difference]: Finished difference. Result has 400 places, 448 transitions, 7275 flow [2023-11-17 11:55:35,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6521, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7275, PETRI_PLACES=400, PETRI_TRANSITIONS=448} [2023-11-17 11:55:35,466 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 378 predicate places. [2023-11-17 11:55:35,466 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 448 transitions, 7275 flow [2023-11-17 11:55:35,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:35,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:35,466 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:35,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-11-17 11:55:35,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:35,667 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:35,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash -857854386, now seen corresponding path program 71 times [2023-11-17 11:55:35,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:35,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256746342] [2023-11-17 11:55:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:36,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:36,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256746342] [2023-11-17 11:55:36,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256746342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:36,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415161043] [2023-11-17 11:55:36,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:55:36,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:36,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:36,113 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:36,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-11-17 11:55:36,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:55:36,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:36,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 11:55:36,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:36,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:36,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:55:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:36,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:36,916 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:55:36,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 135 [2023-11-17 11:55:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:37,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415161043] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:37,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:37,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2023-11-17 11:55:37,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275543160] [2023-11-17 11:55:37,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:55:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:55:37,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:55:37,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:37,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 448 transitions, 7275 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:37,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:37,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:37,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:38,766 INFO L124 PetriNetUnfolderBase]: 2100/3873 cut-off events. [2023-11-17 11:55:38,766 INFO L125 PetriNetUnfolderBase]: For 155985/155985 co-relation queries the response was YES. [2023-11-17 11:55:38,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37653 conditions, 3873 events. 2100/3873 cut-off events. For 155985/155985 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26343 event pairs, 703 based on Foata normal form. 2/3851 useless extension candidates. Maximal degree in co-relation 37467. Up to 3472 conditions per place. [2023-11-17 11:55:38,815 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 420 selfloop transitions, 78 changer transitions 3/501 dead transitions. [2023-11-17 11:55:38,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 501 transitions, 9217 flow [2023-11-17 11:55:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 11:55:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 11:55:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2023-11-17 11:55:38,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3267543859649123 [2023-11-17 11:55:38,816 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 149 transitions. [2023-11-17 11:55:38,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 149 transitions. [2023-11-17 11:55:38,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:38,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 149 transitions. [2023-11-17 11:55:38,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:38,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:38,817 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:38,817 INFO L175 Difference]: Start difference. First operand has 400 places, 448 transitions, 7275 flow. Second operand 19 states and 149 transitions. [2023-11-17 11:55:38,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 501 transitions, 9217 flow [2023-11-17 11:55:39,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 501 transitions, 8819 flow, removed 135 selfloop flow, removed 14 redundant places. [2023-11-17 11:55:39,737 INFO L231 Difference]: Finished difference. Result has 407 places, 461 transitions, 7574 flow [2023-11-17 11:55:39,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6877, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7574, PETRI_PLACES=407, PETRI_TRANSITIONS=461} [2023-11-17 11:55:39,738 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 385 predicate places. [2023-11-17 11:55:39,738 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 461 transitions, 7574 flow [2023-11-17 11:55:39,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:39,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:39,738 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:39,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-11-17 11:55:39,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-11-17 11:55:39,946 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:39,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:39,947 INFO L85 PathProgramCache]: Analyzing trace with hash 666793742, now seen corresponding path program 72 times [2023-11-17 11:55:39,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:39,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737249627] [2023-11-17 11:55:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:39,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:40,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737249627] [2023-11-17 11:55:40,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737249627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667739171] [2023-11-17 11:55:40,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:55:40,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:40,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:40,547 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:40,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-11-17 11:55:41,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:55:41,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:41,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 11:55:41,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:41,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:41,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:55:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:41,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:41,521 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 11:55:41,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2023-11-17 11:55:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:41,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667739171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:41,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:41,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2023-11-17 11:55:41,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144904964] [2023-11-17 11:55:41,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:41,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 11:55:41,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:41,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 11:55:41,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-17 11:55:41,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:41,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 461 transitions, 7574 flow. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 11:55:41,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:41,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:41,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:43,225 INFO L124 PetriNetUnfolderBase]: 2102/3882 cut-off events. [2023-11-17 11:55:43,225 INFO L125 PetriNetUnfolderBase]: For 173823/173823 co-relation queries the response was YES. [2023-11-17 11:55:43,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38213 conditions, 3882 events. 2102/3882 cut-off events. For 173823/173823 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26587 event pairs, 568 based on Foata normal form. 1/3859 useless extension candidates. Maximal degree in co-relation 38023. Up to 2792 conditions per place. [2023-11-17 11:55:43,272 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 355 selfloop transitions, 129 changer transitions 3/487 dead transitions. [2023-11-17 11:55:43,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 487 transitions, 8882 flow [2023-11-17 11:55:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:55:43,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:55:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 107 transitions. [2023-11-17 11:55:43,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31845238095238093 [2023-11-17 11:55:43,273 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 107 transitions. [2023-11-17 11:55:43,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 107 transitions. [2023-11-17 11:55:43,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:43,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 107 transitions. [2023-11-17 11:55:43,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:43,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:43,274 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:43,274 INFO L175 Difference]: Start difference. First operand has 407 places, 461 transitions, 7574 flow. Second operand 14 states and 107 transitions. [2023-11-17 11:55:43,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 487 transitions, 8882 flow [2023-11-17 11:55:44,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 487 transitions, 8436 flow, removed 185 selfloop flow, removed 12 redundant places. [2023-11-17 11:55:44,105 INFO L231 Difference]: Finished difference. Result has 410 places, 461 transitions, 7432 flow [2023-11-17 11:55:44,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7128, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7432, PETRI_PLACES=410, PETRI_TRANSITIONS=461} [2023-11-17 11:55:44,105 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 388 predicate places. [2023-11-17 11:55:44,106 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 461 transitions, 7432 flow [2023-11-17 11:55:44,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 11:55:44,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:44,106 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:44,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-11-17 11:55:44,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:44,307 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:44,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1614790, now seen corresponding path program 73 times [2023-11-17 11:55:44,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:44,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361133379] [2023-11-17 11:55:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:44,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:44,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361133379] [2023-11-17 11:55:44,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361133379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183157003] [2023-11-17 11:55:44,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:55:44,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:44,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:44,769 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:44,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-11-17 11:55:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:45,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 11:55:45,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:45,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:45,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:55:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-17 11:55:45,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:45,540 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:55:45,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:55:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:45,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183157003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:45,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:45,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 25 [2023-11-17 11:55:45,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488877319] [2023-11-17 11:55:45,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:45,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:55:45,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:45,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:55:45,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:55:45,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:45,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 461 transitions, 7432 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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 11:55:45,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:45,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:45,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:47,193 INFO L124 PetriNetUnfolderBase]: 2101/3890 cut-off events. [2023-11-17 11:55:47,193 INFO L125 PetriNetUnfolderBase]: For 174591/174591 co-relation queries the response was YES. [2023-11-17 11:55:47,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38283 conditions, 3890 events. 2101/3890 cut-off events. For 174591/174591 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26617 event pairs, 711 based on Foata normal form. 2/3866 useless extension candidates. Maximal degree in co-relation 38091. Up to 3463 conditions per place. [2023-11-17 11:55:47,358 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 419 selfloop transitions, 79 changer transitions 8/506 dead transitions. [2023-11-17 11:55:47,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 506 transitions, 9039 flow [2023-11-17 11:55:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 11:55:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 11:55:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 150 transitions. [2023-11-17 11:55:47,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32894736842105265 [2023-11-17 11:55:47,360 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 150 transitions. [2023-11-17 11:55:47,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 150 transitions. [2023-11-17 11:55:47,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:47,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 150 transitions. [2023-11-17 11:55:47,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:47,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:47,361 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:47,361 INFO L175 Difference]: Start difference. First operand has 410 places, 461 transitions, 7432 flow. Second operand 19 states and 150 transitions. [2023-11-17 11:55:47,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 506 transitions, 9039 flow [2023-11-17 11:55:48,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 506 transitions, 8754 flow, removed 16 selfloop flow, removed 13 redundant places. [2023-11-17 11:55:48,147 INFO L231 Difference]: Finished difference. Result has 417 places, 462 transitions, 7390 flow [2023-11-17 11:55:48,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7149, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7390, PETRI_PLACES=417, PETRI_TRANSITIONS=462} [2023-11-17 11:55:48,148 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 395 predicate places. [2023-11-17 11:55:48,148 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 462 transitions, 7390 flow [2023-11-17 11:55:48,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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 11:55:48,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:48,148 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:48,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-11-17 11:55:48,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:48,349 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:48,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1468429938, now seen corresponding path program 74 times [2023-11-17 11:55:48,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:48,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032015510] [2023-11-17 11:55:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:48,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:48,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:48,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032015510] [2023-11-17 11:55:48,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032015510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:48,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368788425] [2023-11-17 11:55:48,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:55:48,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:48,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:48,784 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:48,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-11-17 11:55:49,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:55:49,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:49,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:55:49,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:49,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:49,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:55:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:49,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:49,563 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:55:49,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:55:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:49,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368788425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:49,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:49,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-17 11:55:49,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940258379] [2023-11-17 11:55:49,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:49,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 11:55:49,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 11:55:49,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2023-11-17 11:55:49,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:49,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 462 transitions, 7390 flow. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:49,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:49,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:49,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:51,532 INFO L124 PetriNetUnfolderBase]: 2157/4004 cut-off events. [2023-11-17 11:55:51,532 INFO L125 PetriNetUnfolderBase]: For 184296/184296 co-relation queries the response was YES. [2023-11-17 11:55:51,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39600 conditions, 4004 events. 2157/4004 cut-off events. For 184296/184296 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 27776 event pairs, 556 based on Foata normal form. 2/3988 useless extension candidates. Maximal degree in co-relation 39405. Up to 2760 conditions per place. [2023-11-17 11:55:51,580 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 361 selfloop transitions, 157 changer transitions 5/523 dead transitions. [2023-11-17 11:55:51,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 523 transitions, 9468 flow [2023-11-17 11:55:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:55:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:55:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 166 transitions. [2023-11-17 11:55:51,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3458333333333333 [2023-11-17 11:55:51,582 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 166 transitions. [2023-11-17 11:55:51,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 166 transitions. [2023-11-17 11:55:51,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:51,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 166 transitions. [2023-11-17 11:55:51,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.3) internal successors, (166), 20 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:51,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:51,582 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:51,582 INFO L175 Difference]: Start difference. First operand has 417 places, 462 transitions, 7390 flow. Second operand 20 states and 166 transitions. [2023-11-17 11:55:51,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 523 transitions, 9468 flow [2023-11-17 11:55:52,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 523 transitions, 9258 flow, removed 33 selfloop flow, removed 15 redundant places. [2023-11-17 11:55:52,314 INFO L231 Difference]: Finished difference. Result has 423 places, 472 transitions, 7864 flow [2023-11-17 11:55:52,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7180, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7864, PETRI_PLACES=423, PETRI_TRANSITIONS=472} [2023-11-17 11:55:52,314 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 401 predicate places. [2023-11-17 11:55:52,315 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 472 transitions, 7864 flow [2023-11-17 11:55:52,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:52,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:52,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:52,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-11-17 11:55:52,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:52,522 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:52,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash -586562260, now seen corresponding path program 75 times [2023-11-17 11:55:52,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:52,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92981987] [2023-11-17 11:55:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:52,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:53,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:53,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92981987] [2023-11-17 11:55:53,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92981987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:53,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727629980] [2023-11-17 11:55:53,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:55:53,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:53,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:53,106 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:53,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-11-17 11:55:53,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 11:55:53,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:53,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 11:55:53,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:53,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:53,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:55:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:53,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:53,938 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 11:55:53,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2023-11-17 11:55:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:54,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727629980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:54,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:54,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2023-11-17 11:55:54,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7921633] [2023-11-17 11:55:54,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:54,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 11:55:54,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:54,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 11:55:54,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-11-17 11:55:54,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:54,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 472 transitions, 7864 flow. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 11:55:54,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:54,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:54,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:56,100 INFO L124 PetriNetUnfolderBase]: 2205/4091 cut-off events. [2023-11-17 11:55:56,100 INFO L125 PetriNetUnfolderBase]: For 204357/204357 co-relation queries the response was YES. [2023-11-17 11:55:56,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41818 conditions, 4091 events. 2205/4091 cut-off events. For 204357/204357 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28407 event pairs, 723 based on Foata normal form. 3/4076 useless extension candidates. Maximal degree in co-relation 41623. Up to 3652 conditions per place. [2023-11-17 11:55:56,152 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 447 selfloop transitions, 77 changer transitions 5/529 dead transitions. [2023-11-17 11:55:56,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 529 transitions, 9849 flow [2023-11-17 11:55:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:55:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:55:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 158 transitions. [2023-11-17 11:55:56,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32916666666666666 [2023-11-17 11:55:56,153 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 158 transitions. [2023-11-17 11:55:56,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 158 transitions. [2023-11-17 11:55:56,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:56,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 158 transitions. [2023-11-17 11:55:56,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:56,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:56,154 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:56,154 INFO L175 Difference]: Start difference. First operand has 423 places, 472 transitions, 7864 flow. Second operand 20 states and 158 transitions. [2023-11-17 11:55:56,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 529 transitions, 9849 flow [2023-11-17 11:55:57,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 529 transitions, 9437 flow, removed 104 selfloop flow, removed 16 redundant places. [2023-11-17 11:55:57,035 INFO L231 Difference]: Finished difference. Result has 430 places, 482 transitions, 8036 flow [2023-11-17 11:55:57,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7453, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8036, PETRI_PLACES=430, PETRI_TRANSITIONS=482} [2023-11-17 11:55:57,036 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 408 predicate places. [2023-11-17 11:55:57,036 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 482 transitions, 8036 flow [2023-11-17 11:55:57,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 11:55:57,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:57,036 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:57,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-11-17 11:55:57,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2023-11-17 11:55:57,237 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:55:57,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:57,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1082380422, now seen corresponding path program 76 times [2023-11-17 11:55:57,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:57,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265064511] [2023-11-17 11:55:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:57,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:57,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:57,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265064511] [2023-11-17 11:55:57,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265064511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:57,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283720281] [2023-11-17 11:55:57,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:55:57,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:57,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:57,746 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:57,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-11-17 11:55:58,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:55:58,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:58,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:55:58,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:58,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:58,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:55:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:58,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:58,713 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 11:55:58,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2023-11-17 11:55:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:55:58,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283720281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:58,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:58,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-11-17 11:55:58,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148827200] [2023-11-17 11:55:58,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:58,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:55:58,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:58,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:55:58,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:55:58,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:55:58,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 482 transitions, 8036 flow. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:58,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:58,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:55:58,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:00,850 INFO L124 PetriNetUnfolderBase]: 2347/4367 cut-off events. [2023-11-17 11:56:00,850 INFO L125 PetriNetUnfolderBase]: For 244512/244512 co-relation queries the response was YES. [2023-11-17 11:56:00,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46103 conditions, 4367 events. 2347/4367 cut-off events. For 244512/244512 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 30881 event pairs, 452 based on Foata normal form. 2/4351 useless extension candidates. Maximal degree in co-relation 45905. Up to 1824 conditions per place. [2023-11-17 11:56:00,905 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 358 selfloop transitions, 182 changer transitions 5/545 dead transitions. [2023-11-17 11:56:00,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 545 transitions, 10414 flow [2023-11-17 11:56:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 11:56:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 11:56:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 128 transitions. [2023-11-17 11:56:00,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:56:00,906 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 128 transitions. [2023-11-17 11:56:00,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 128 transitions. [2023-11-17 11:56:00,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:00,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 128 transitions. [2023-11-17 11:56:00,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.0) internal successors, (128), 16 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:00,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 24.0) internal successors, (408), 17 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:00,907 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 24.0) internal successors, (408), 17 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:00,907 INFO L175 Difference]: Start difference. First operand has 430 places, 482 transitions, 8036 flow. Second operand 16 states and 128 transitions. [2023-11-17 11:56:00,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 545 transitions, 10414 flow [2023-11-17 11:56:01,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 545 transitions, 10064 flow, removed 136 selfloop flow, removed 14 redundant places. [2023-11-17 11:56:01,798 INFO L231 Difference]: Finished difference. Result has 436 places, 500 transitions, 8801 flow [2023-11-17 11:56:01,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7694, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8801, PETRI_PLACES=436, PETRI_TRANSITIONS=500} [2023-11-17 11:56:01,799 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 414 predicate places. [2023-11-17 11:56:01,799 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 500 transitions, 8801 flow [2023-11-17 11:56:01,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:01,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:01,799 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:01,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2023-11-17 11:56:02,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:02,001 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:02,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:02,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1040368006, now seen corresponding path program 77 times [2023-11-17 11:56:02,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:02,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895401396] [2023-11-17 11:56:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:02,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:02,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895401396] [2023-11-17 11:56:02,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895401396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828899266] [2023-11-17 11:56:02,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:56:02,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:02,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:02,586 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:02,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-11-17 11:56:03,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:56:03,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:03,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 11:56:03,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:03,164 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 11:56:03,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-17 11:56:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:03,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:03,589 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 11:56:03,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 244 treesize of output 126 [2023-11-17 11:56:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:03,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828899266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:03,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:03,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2023-11-17 11:56:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298886388] [2023-11-17 11:56:03,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:03,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:56:03,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:03,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:56:03,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:56:03,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:03,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 500 transitions, 8801 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:03,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:03,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:03,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:06,431 INFO L124 PetriNetUnfolderBase]: 2613/4863 cut-off events. [2023-11-17 11:56:06,431 INFO L125 PetriNetUnfolderBase]: For 305848/305848 co-relation queries the response was YES. [2023-11-17 11:56:06,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54787 conditions, 4863 events. 2613/4863 cut-off events. For 305848/305848 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 34696 event pairs, 809 based on Foata normal form. 6/4853 useless extension candidates. Maximal degree in co-relation 54585. Up to 4151 conditions per place. [2023-11-17 11:56:06,510 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 499 selfloop transitions, 129 changer transitions 14/642 dead transitions. [2023-11-17 11:56:06,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 642 transitions, 13353 flow [2023-11-17 11:56:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 11:56:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 11:56:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 212 transitions. [2023-11-17 11:56:06,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271604938271605 [2023-11-17 11:56:06,511 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 212 transitions. [2023-11-17 11:56:06,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 212 transitions. [2023-11-17 11:56:06,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:06,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 212 transitions. [2023-11-17 11:56:06,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.851851851851852) internal successors, (212), 27 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:06,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 24.0) internal successors, (672), 28 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:06,513 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 24.0) internal successors, (672), 28 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:06,513 INFO L175 Difference]: Start difference. First operand has 436 places, 500 transitions, 8801 flow. Second operand 27 states and 212 transitions. [2023-11-17 11:56:06,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 642 transitions, 13353 flow [2023-11-17 11:56:07,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 642 transitions, 12849 flow, removed 175 selfloop flow, removed 7 redundant places. [2023-11-17 11:56:07,840 INFO L231 Difference]: Finished difference. Result has 464 places, 567 transitions, 10915 flow [2023-11-17 11:56:07,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=8365, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10915, PETRI_PLACES=464, PETRI_TRANSITIONS=567} [2023-11-17 11:56:07,841 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 442 predicate places. [2023-11-17 11:56:07,841 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 567 transitions, 10915 flow [2023-11-17 11:56:07,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:07,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:07,841 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:07,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-11-17 11:56:08,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:08,042 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:08,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:08,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1914108686, now seen corresponding path program 78 times [2023-11-17 11:56:08,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:08,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915822583] [2023-11-17 11:56:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:08,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:08,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:08,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915822583] [2023-11-17 11:56:08,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915822583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:08,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710778203] [2023-11-17 11:56:08,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:56:08,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:08,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:08,596 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:08,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-11-17 11:56:08,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:56:08,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:08,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:56:08,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:09,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:09,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:56:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:09,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:09,481 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 11:56:09,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2023-11-17 11:56:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710778203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:09,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:09,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-11-17 11:56:09,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978365278] [2023-11-17 11:56:09,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:09,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:56:09,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:09,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:56:09,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:56:09,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:09,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 567 transitions, 10915 flow. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:09,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:09,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:09,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:12,119 INFO L124 PetriNetUnfolderBase]: 2611/4872 cut-off events. [2023-11-17 11:56:12,119 INFO L125 PetriNetUnfolderBase]: For 296717/296717 co-relation queries the response was YES. [2023-11-17 11:56:12,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55175 conditions, 4872 events. 2611/4872 cut-off events. For 296717/296717 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34817 event pairs, 853 based on Foata normal form. 2/4858 useless extension candidates. Maximal degree in co-relation 54964. Up to 4475 conditions per place. [2023-11-17 11:56:12,193 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 520 selfloop transitions, 87 changer transitions 7/614 dead transitions. [2023-11-17 11:56:12,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 614 transitions, 13090 flow [2023-11-17 11:56:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:56:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:56:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 150 transitions. [2023-11-17 11:56:12,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 11:56:12,195 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 150 transitions. [2023-11-17 11:56:12,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 150 transitions. [2023-11-17 11:56:12,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:12,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 150 transitions. [2023-11-17 11:56:12,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.5) internal successors, (150), 20 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:12,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:12,196 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:12,196 INFO L175 Difference]: Start difference. First operand has 464 places, 567 transitions, 10915 flow. Second operand 20 states and 150 transitions. [2023-11-17 11:56:12,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 614 transitions, 13090 flow [2023-11-17 11:56:13,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 614 transitions, 11244 flow, removed 889 selfloop flow, removed 11 redundant places. [2023-11-17 11:56:13,476 INFO L231 Difference]: Finished difference. Result has 473 places, 576 transitions, 9770 flow [2023-11-17 11:56:13,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9357, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9770, PETRI_PLACES=473, PETRI_TRANSITIONS=576} [2023-11-17 11:56:13,477 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 451 predicate places. [2023-11-17 11:56:13,477 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 576 transitions, 9770 flow [2023-11-17 11:56:13,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:13,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:13,477 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:13,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-11-17 11:56:13,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-11-17 11:56:13,678 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:13,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1521389434, now seen corresponding path program 79 times [2023-11-17 11:56:13,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:13,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839886616] [2023-11-17 11:56:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:13,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:14,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:14,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839886616] [2023-11-17 11:56:14,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839886616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:14,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773567064] [2023-11-17 11:56:14,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:56:14,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:14,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:14,097 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:14,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-11-17 11:56:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:14,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:56:14,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:14,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:14,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-17 11:56:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:14,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:15,015 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 11:56:15,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2023-11-17 11:56:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:15,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773567064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:15,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:15,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-17 11:56:15,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008296308] [2023-11-17 11:56:15,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:15,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:56:15,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:56:15,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:56:15,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:15,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 576 transitions, 9770 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:15,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:15,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:15,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:17,387 INFO L124 PetriNetUnfolderBase]: 2612/4885 cut-off events. [2023-11-17 11:56:17,387 INFO L125 PetriNetUnfolderBase]: For 257821/257821 co-relation queries the response was YES. [2023-11-17 11:56:17,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51217 conditions, 4885 events. 2612/4885 cut-off events. For 257821/257821 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 35030 event pairs, 859 based on Foata normal form. 2/4853 useless extension candidates. Maximal degree in co-relation 51004. Up to 4453 conditions per place. [2023-11-17 11:56:17,453 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 521 selfloop transitions, 84 changer transitions 7/612 dead transitions. [2023-11-17 11:56:17,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 612 transitions, 11547 flow [2023-11-17 11:56:17,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 11:56:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 11:56:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 137 transitions. [2023-11-17 11:56:17,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31712962962962965 [2023-11-17 11:56:17,454 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 137 transitions. [2023-11-17 11:56:17,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 137 transitions. [2023-11-17 11:56:17,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:17,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 137 transitions. [2023-11-17 11:56:17,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.611111111111111) internal successors, (137), 18 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:17,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 24.0) internal successors, (456), 19 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:17,455 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 24.0) internal successors, (456), 19 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:17,455 INFO L175 Difference]: Start difference. First operand has 473 places, 576 transitions, 9770 flow. Second operand 18 states and 137 transitions. [2023-11-17 11:56:17,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 612 transitions, 11547 flow [2023-11-17 11:56:18,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 612 transitions, 11367 flow, removed 49 selfloop flow, removed 13 redundant places. [2023-11-17 11:56:18,724 INFO L231 Difference]: Finished difference. Result has 479 places, 576 transitions, 9869 flow [2023-11-17 11:56:18,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9590, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9869, PETRI_PLACES=479, PETRI_TRANSITIONS=576} [2023-11-17 11:56:18,725 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 457 predicate places. [2023-11-17 11:56:18,725 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 576 transitions, 9869 flow [2023-11-17 11:56:18,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:18,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:18,725 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:18,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2023-11-17 11:56:18,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:18,926 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:18,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:18,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1711072945, now seen corresponding path program 80 times [2023-11-17 11:56:18,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:18,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067278254] [2023-11-17 11:56:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:18,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:19,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:19,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067278254] [2023-11-17 11:56:19,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067278254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:19,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530524994] [2023-11-17 11:56:19,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:56:19,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:19,455 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:19,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-11-17 11:56:19,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:56:19,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:19,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 11:56:19,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:19,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:19,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:56:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:56:19,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:20,126 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-11-17 11:56:20,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-11-17 11:56:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:56:20,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530524994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:20,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:20,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 20 [2023-11-17 11:56:20,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194756154] [2023-11-17 11:56:20,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:20,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 11:56:20,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:20,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 11:56:20,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-17 11:56:20,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:20,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 576 transitions, 9869 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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 11:56:20,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:20,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:20,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:21,970 INFO L124 PetriNetUnfolderBase]: 2574/4820 cut-off events. [2023-11-17 11:56:21,970 INFO L125 PetriNetUnfolderBase]: For 259955/259955 co-relation queries the response was YES. [2023-11-17 11:56:22,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50913 conditions, 4820 events. 2574/4820 cut-off events. For 259955/259955 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 34675 event pairs, 942 based on Foata normal form. 18/4810 useless extension candidates. Maximal degree in co-relation 50698. Up to 3840 conditions per place. [2023-11-17 11:56:22,035 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 475 selfloop transitions, 118 changer transitions 1/594 dead transitions. [2023-11-17 11:56:22,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 594 transitions, 11470 flow [2023-11-17 11:56:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:56:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:56:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2023-11-17 11:56:22,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35648148148148145 [2023-11-17 11:56:22,036 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 77 transitions. [2023-11-17 11:56:22,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 77 transitions. [2023-11-17 11:56:22,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:22,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 77 transitions. [2023-11-17 11:56:22,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 11:56:22,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:22,037 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:22,037 INFO L175 Difference]: Start difference. First operand has 479 places, 576 transitions, 9869 flow. Second operand 9 states and 77 transitions. [2023-11-17 11:56:22,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 594 transitions, 11470 flow [2023-11-17 11:56:23,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 594 transitions, 11241 flow, removed 40 selfloop flow, removed 18 redundant places. [2023-11-17 11:56:23,332 INFO L231 Difference]: Finished difference. Result has 467 places, 569 transitions, 9823 flow [2023-11-17 11:56:23,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9595, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9823, PETRI_PLACES=467, PETRI_TRANSITIONS=569} [2023-11-17 11:56:23,332 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 445 predicate places. [2023-11-17 11:56:23,333 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 569 transitions, 9823 flow [2023-11-17 11:56:23,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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 11:56:23,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:23,333 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:23,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-11-17 11:56:23,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:23,533 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:23,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:23,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1318463140, now seen corresponding path program 81 times [2023-11-17 11:56:23,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:23,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131260448] [2023-11-17 11:56:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:23,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:24,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:24,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131260448] [2023-11-17 11:56:24,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131260448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:24,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029459294] [2023-11-17 11:56:24,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:56:24,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:24,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:24,232 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:24,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-11-17 11:56:24,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 11:56:24,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:24,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 11:56:24,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:24,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:24,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 11:56:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:24,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:25,139 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-11-17 11:56:25,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2023-11-17 11:56:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:25,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029459294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:25,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:25,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2023-11-17 11:56:25,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700829571] [2023-11-17 11:56:25,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:25,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 11:56:25,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:25,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 11:56:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-11-17 11:56:25,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:25,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 569 transitions, 9823 flow. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:25,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:25,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:25,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:27,428 INFO L124 PetriNetUnfolderBase]: 2579/4831 cut-off events. [2023-11-17 11:56:27,428 INFO L125 PetriNetUnfolderBase]: For 255621/255621 co-relation queries the response was YES. [2023-11-17 11:56:27,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50940 conditions, 4831 events. 2579/4831 cut-off events. For 255621/255621 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34643 event pairs, 672 based on Foata normal form. 2/4805 useless extension candidates. Maximal degree in co-relation 50729. Up to 3591 conditions per place. [2023-11-17 11:56:27,508 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 453 selfloop transitions, 163 changer transitions 3/619 dead transitions. [2023-11-17 11:56:27,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 619 transitions, 11884 flow [2023-11-17 11:56:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:56:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:56:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 162 transitions. [2023-11-17 11:56:27,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3375 [2023-11-17 11:56:27,509 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 162 transitions. [2023-11-17 11:56:27,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 162 transitions. [2023-11-17 11:56:27,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:27,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 162 transitions. [2023-11-17 11:56:27,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.1) internal successors, (162), 20 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:27,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:27,510 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:27,510 INFO L175 Difference]: Start difference. First operand has 467 places, 569 transitions, 9823 flow. Second operand 20 states and 162 transitions. [2023-11-17 11:56:27,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 619 transitions, 11884 flow [2023-11-17 11:56:29,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 619 transitions, 11692 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-11-17 11:56:29,099 INFO L231 Difference]: Finished difference. Result has 473 places, 571 transitions, 10087 flow [2023-11-17 11:56:29,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9631, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10087, PETRI_PLACES=473, PETRI_TRANSITIONS=571} [2023-11-17 11:56:29,100 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 451 predicate places. [2023-11-17 11:56:29,100 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 571 transitions, 10087 flow [2023-11-17 11:56:29,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:29,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:29,100 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:29,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-11-17 11:56:29,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-11-17 11:56:29,309 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:29,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:29,309 INFO L85 PathProgramCache]: Analyzing trace with hash 60979979, now seen corresponding path program 82 times [2023-11-17 11:56:29,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:29,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532825601] [2023-11-17 11:56:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:29,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:56:29,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:29,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532825601] [2023-11-17 11:56:29,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532825601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:29,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349254759] [2023-11-17 11:56:29,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:56:29,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:29,898 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:29,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-11-17 11:56:30,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:56:30,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:30,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:56:30,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:30,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:30,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:56:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:56:30,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:30,579 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-11-17 11:56:30,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-11-17 11:56:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:56:30,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349254759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:30,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:30,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 11:56:30,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59767320] [2023-11-17 11:56:30,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:30,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:56:30,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:30,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:56:30,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:56:30,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:30,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 571 transitions, 10087 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 11:56:30,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:30,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:30,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:32,530 INFO L124 PetriNetUnfolderBase]: 2572/4806 cut-off events. [2023-11-17 11:56:32,531 INFO L125 PetriNetUnfolderBase]: For 260109/260109 co-relation queries the response was YES. [2023-11-17 11:56:32,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51040 conditions, 4806 events. 2572/4806 cut-off events. For 260109/260109 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34331 event pairs, 954 based on Foata normal form. 2/4780 useless extension candidates. Maximal degree in co-relation 50834. Up to 3854 conditions per place. [2023-11-17 11:56:32,593 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 473 selfloop transitions, 117 changer transitions 2/592 dead transitions. [2023-11-17 11:56:32,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 592 transitions, 11582 flow [2023-11-17 11:56:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:56:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:56:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 78 transitions. [2023-11-17 11:56:32,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.325 [2023-11-17 11:56:32,594 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 78 transitions. [2023-11-17 11:56:32,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 78 transitions. [2023-11-17 11:56:32,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:32,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 78 transitions. [2023-11-17 11:56:32,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 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 11:56:32,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:32,595 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:32,595 INFO L175 Difference]: Start difference. First operand has 473 places, 571 transitions, 10087 flow. Second operand 10 states and 78 transitions. [2023-11-17 11:56:32,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 592 transitions, 11582 flow [2023-11-17 11:56:33,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 592 transitions, 11123 flow, removed 31 selfloop flow, removed 19 redundant places. [2023-11-17 11:56:33,889 INFO L231 Difference]: Finished difference. Result has 462 places, 568 transitions, 9829 flow [2023-11-17 11:56:33,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9600, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9829, PETRI_PLACES=462, PETRI_TRANSITIONS=568} [2023-11-17 11:56:33,890 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 440 predicate places. [2023-11-17 11:56:33,890 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 568 transitions, 9829 flow [2023-11-17 11:56:33,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 11:56:33,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:33,890 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:33,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-11-17 11:56:34,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:34,098 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:34,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:34,099 INFO L85 PathProgramCache]: Analyzing trace with hash -608487506, now seen corresponding path program 83 times [2023-11-17 11:56:34,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:34,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456623108] [2023-11-17 11:56:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:34,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:34,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:34,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456623108] [2023-11-17 11:56:34,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456623108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:34,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081703784] [2023-11-17 11:56:34,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:56:34,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:34,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:34,626 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:34,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-11-17 11:56:35,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:56:35,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:35,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 11:56:35,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:35,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:35,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:56:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:35,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:35,450 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2023-11-17 11:56:35,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2023-11-17 11:56:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:35,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081703784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:35,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:35,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2023-11-17 11:56:35,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966061975] [2023-11-17 11:56:35,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:35,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 11:56:35,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:35,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 11:56:35,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-11-17 11:56:35,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:35,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 568 transitions, 9829 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 11:56:35,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:35,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:35,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:37,388 INFO L124 PetriNetUnfolderBase]: 2583/4823 cut-off events. [2023-11-17 11:56:37,389 INFO L125 PetriNetUnfolderBase]: For 256177/256177 co-relation queries the response was YES. [2023-11-17 11:56:37,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50936 conditions, 4823 events. 2583/4823 cut-off events. For 256177/256177 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 34412 event pairs, 914 based on Foata normal form. 8/4803 useless extension candidates. Maximal degree in co-relation 50733. Up to 3041 conditions per place. [2023-11-17 11:56:37,459 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 450 selfloop transitions, 157 changer transitions 0/607 dead transitions. [2023-11-17 11:56:37,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 607 transitions, 11900 flow [2023-11-17 11:56:37,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 11:56:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 11:56:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 92 transitions. [2023-11-17 11:56:37,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2023-11-17 11:56:37,460 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 92 transitions. [2023-11-17 11:56:37,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 92 transitions. [2023-11-17 11:56:37,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:37,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 92 transitions. [2023-11-17 11:56:37,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:37,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:37,461 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:37,461 INFO L175 Difference]: Start difference. First operand has 462 places, 568 transitions, 9829 flow. Second operand 11 states and 92 transitions. [2023-11-17 11:56:37,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 607 transitions, 11900 flow [2023-11-17 11:56:38,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 607 transitions, 11656 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-17 11:56:38,752 INFO L231 Difference]: Finished difference. Result has 461 places, 569 transitions, 9957 flow [2023-11-17 11:56:38,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9585, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9957, PETRI_PLACES=461, PETRI_TRANSITIONS=569} [2023-11-17 11:56:38,753 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 439 predicate places. [2023-11-17 11:56:38,753 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 569 transitions, 9957 flow [2023-11-17 11:56:38,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 11:56:38,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:38,753 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:38,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2023-11-17 11:56:38,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:38,954 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:38,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 322049551, now seen corresponding path program 84 times [2023-11-17 11:56:38,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:38,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501776567] [2023-11-17 11:56:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:38,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:39,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:39,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501776567] [2023-11-17 11:56:39,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501776567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:39,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914886066] [2023-11-17 11:56:39,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:56:39,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:39,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:39,407 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:39,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-11-17 11:56:40,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:56:40,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:40,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:56:40,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:40,182 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:56:40,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-11-17 11:56:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:40,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:40,301 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 11:56:40,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2023-11-17 11:56:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:40,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914886066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:40,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:40,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2023-11-17 11:56:40,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417537860] [2023-11-17 11:56:40,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:40,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 11:56:40,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 11:56:40,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-17 11:56:40,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:40,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 569 transitions, 9957 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:40,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:40,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:40,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:42,310 INFO L124 PetriNetUnfolderBase]: 2763/5137 cut-off events. [2023-11-17 11:56:42,310 INFO L125 PetriNetUnfolderBase]: For 279687/279687 co-relation queries the response was YES. [2023-11-17 11:56:42,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54865 conditions, 5137 events. 2763/5137 cut-off events. For 279687/279687 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 37073 event pairs, 531 based on Foata normal form. 32/5141 useless extension candidates. Maximal degree in co-relation 54661. Up to 2613 conditions per place. [2023-11-17 11:56:42,377 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 483 selfloop transitions, 175 changer transitions 0/658 dead transitions. [2023-11-17 11:56:42,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 658 transitions, 13109 flow [2023-11-17 11:56:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:56:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:56:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 113 transitions. [2023-11-17 11:56:42,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923611111111111 [2023-11-17 11:56:42,378 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 113 transitions. [2023-11-17 11:56:42,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 113 transitions. [2023-11-17 11:56:42,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:42,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 113 transitions. [2023-11-17 11:56:42,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:42,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:42,379 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:42,379 INFO L175 Difference]: Start difference. First operand has 461 places, 569 transitions, 9957 flow. Second operand 12 states and 113 transitions. [2023-11-17 11:56:42,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 658 transitions, 13109 flow [2023-11-17 11:56:43,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 658 transitions, 12894 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-11-17 11:56:43,657 INFO L231 Difference]: Finished difference. Result has 469 places, 582 transitions, 10624 flow [2023-11-17 11:56:43,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9742, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10624, PETRI_PLACES=469, PETRI_TRANSITIONS=582} [2023-11-17 11:56:43,658 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 447 predicate places. [2023-11-17 11:56:43,658 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 582 transitions, 10624 flow [2023-11-17 11:56:43,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:43,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:43,658 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:43,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2023-11-17 11:56:43,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:43,859 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:43,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:43,859 INFO L85 PathProgramCache]: Analyzing trace with hash 605417199, now seen corresponding path program 85 times [2023-11-17 11:56:43,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:43,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880262640] [2023-11-17 11:56:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:43,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:44,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:44,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880262640] [2023-11-17 11:56:44,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880262640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:44,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314934963] [2023-11-17 11:56:44,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:56:44,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:44,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:44,418 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:44,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-11-17 11:56:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:44,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:56:44,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:45,011 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 11:56:45,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 9 [2023-11-17 11:56:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:45,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:45,167 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 11:56:45,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2023-11-17 11:56:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:45,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314934963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:45,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:45,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-17 11:56:45,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720354385] [2023-11-17 11:56:45,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:45,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:56:45,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:45,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:56:45,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:56:45,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:45,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 582 transitions, 10624 flow. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:45,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:45,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:45,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:47,592 INFO L124 PetriNetUnfolderBase]: 2811/5221 cut-off events. [2023-11-17 11:56:47,592 INFO L125 PetriNetUnfolderBase]: For 295223/295223 co-relation queries the response was YES. [2023-11-17 11:56:47,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56821 conditions, 5221 events. 2811/5221 cut-off events. For 295223/295223 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37721 event pairs, 559 based on Foata normal form. 24/5217 useless extension candidates. Maximal degree in co-relation 56612. Up to 2673 conditions per place. [2023-11-17 11:56:47,677 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 478 selfloop transitions, 188 changer transitions 0/666 dead transitions. [2023-11-17 11:56:47,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 666 transitions, 13585 flow [2023-11-17 11:56:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:56:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:56:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 128 transitions. [2023-11-17 11:56:47,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2023-11-17 11:56:47,678 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 128 transitions. [2023-11-17 11:56:47,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 128 transitions. [2023-11-17 11:56:47,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:47,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 128 transitions. [2023-11-17 11:56:47,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:47,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:47,679 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 24.0) internal successors, (360), 15 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:47,679 INFO L175 Difference]: Start difference. First operand has 469 places, 582 transitions, 10624 flow. Second operand 14 states and 128 transitions. [2023-11-17 11:56:47,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 666 transitions, 13585 flow [2023-11-17 11:56:49,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 666 transitions, 13259 flow, removed 48 selfloop flow, removed 7 redundant places. [2023-11-17 11:56:49,070 INFO L231 Difference]: Finished difference. Result has 479 places, 589 transitions, 10972 flow [2023-11-17 11:56:49,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10340, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10972, PETRI_PLACES=479, PETRI_TRANSITIONS=589} [2023-11-17 11:56:49,071 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 457 predicate places. [2023-11-17 11:56:49,071 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 589 transitions, 10972 flow [2023-11-17 11:56:49,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:49,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:49,071 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:49,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2023-11-17 11:56:49,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2023-11-17 11:56:49,271 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:49,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:49,272 INFO L85 PathProgramCache]: Analyzing trace with hash -761872903, now seen corresponding path program 86 times [2023-11-17 11:56:49,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:49,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624122401] [2023-11-17 11:56:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:49,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:49,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:49,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624122401] [2023-11-17 11:56:49,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624122401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:49,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202479927] [2023-11-17 11:56:49,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:56:49,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:49,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:49,933 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:49,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-11-17 11:56:50,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:56:50,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:50,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:56:50,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:50,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:50,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2023-11-17 11:56:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:50,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:50,723 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 11:56:50,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2023-11-17 11:56:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:50,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202479927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:50,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:50,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-17 11:56:50,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844046532] [2023-11-17 11:56:50,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:50,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:56:50,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:50,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:56:50,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:56:50,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:50,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 589 transitions, 10972 flow. Second operand has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:50,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:50,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:50,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:53,350 INFO L124 PetriNetUnfolderBase]: 2939/5473 cut-off events. [2023-11-17 11:56:53,350 INFO L125 PetriNetUnfolderBase]: For 334559/334559 co-relation queries the response was YES. [2023-11-17 11:56:53,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60548 conditions, 5473 events. 2939/5473 cut-off events. For 334559/334559 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40118 event pairs, 539 based on Foata normal form. 24/5469 useless extension candidates. Maximal degree in co-relation 60335. Up to 2497 conditions per place. [2023-11-17 11:56:53,427 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 474 selfloop transitions, 212 changer transitions 0/686 dead transitions. [2023-11-17 11:56:53,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 686 transitions, 14297 flow [2023-11-17 11:56:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 11:56:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 11:56:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 161 transitions. [2023-11-17 11:56:53,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3726851851851852 [2023-11-17 11:56:53,428 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 161 transitions. [2023-11-17 11:56:53,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 161 transitions. [2023-11-17 11:56:53,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:53,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 161 transitions. [2023-11-17 11:56:53,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.944444444444445) internal successors, (161), 18 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:53,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 24.0) internal successors, (456), 19 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:53,429 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 24.0) internal successors, (456), 19 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:53,429 INFO L175 Difference]: Start difference. First operand has 479 places, 589 transitions, 10972 flow. Second operand 18 states and 161 transitions. [2023-11-17 11:56:53,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 686 transitions, 14297 flow [2023-11-17 11:56:55,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 686 transitions, 13971 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-11-17 11:56:55,044 INFO L231 Difference]: Finished difference. Result has 492 places, 600 transitions, 11529 flow [2023-11-17 11:56:55,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10688, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11529, PETRI_PLACES=492, PETRI_TRANSITIONS=600} [2023-11-17 11:56:55,044 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 470 predicate places. [2023-11-17 11:56:55,045 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 600 transitions, 11529 flow [2023-11-17 11:56:55,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:55,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:55,045 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:55,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2023-11-17 11:56:55,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:55,246 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:56:55,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:55,246 INFO L85 PathProgramCache]: Analyzing trace with hash -603109179, now seen corresponding path program 87 times [2023-11-17 11:56:55,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:55,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448011157] [2023-11-17 11:56:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:55,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:55,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:55,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448011157] [2023-11-17 11:56:55,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448011157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:55,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4782286] [2023-11-17 11:56:55,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:56:55,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:55,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:55,730 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:55,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-11-17 11:56:56,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 11:56:56,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:56,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 11:56:56,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:56,495 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:56:56,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-11-17 11:56:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-17 11:56:56,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:56,668 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 11:56:56,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2023-11-17 11:56:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:56:56,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4782286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:56,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:56,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 26 [2023-11-17 11:56:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110549522] [2023-11-17 11:56:56,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:56,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:56:56,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:56:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:56:56,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:56:56,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 600 transitions, 11529 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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 11:56:56,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:56,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:56:56,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:59,653 INFO L124 PetriNetUnfolderBase]: 3144/5941 cut-off events. [2023-11-17 11:56:59,653 INFO L125 PetriNetUnfolderBase]: For 370251/370251 co-relation queries the response was YES. [2023-11-17 11:56:59,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65719 conditions, 5941 events. 3144/5941 cut-off events. For 370251/370251 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 45117 event pairs, 365 based on Foata normal form. 32/5945 useless extension candidates. Maximal degree in co-relation 65502. Up to 2827 conditions per place. [2023-11-17 11:56:59,737 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 457 selfloop transitions, 291 changer transitions 17/765 dead transitions. [2023-11-17 11:56:59,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 765 transitions, 16008 flow [2023-11-17 11:56:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 11:56:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 11:56:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 194 transitions. [2023-11-17 11:56:59,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35144927536231885 [2023-11-17 11:56:59,738 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 194 transitions. [2023-11-17 11:56:59,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 194 transitions. [2023-11-17 11:56:59,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:59,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 194 transitions. [2023-11-17 11:56:59,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 8.434782608695652) internal successors, (194), 23 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:59,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:59,740 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:59,740 INFO L175 Difference]: Start difference. First operand has 492 places, 600 transitions, 11529 flow. Second operand 23 states and 194 transitions. [2023-11-17 11:56:59,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 765 transitions, 16008 flow [2023-11-17 11:57:01,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 765 transitions, 15322 flow, removed 123 selfloop flow, removed 14 redundant places. [2023-11-17 11:57:01,734 INFO L231 Difference]: Finished difference. Result has 502 places, 644 transitions, 12547 flow [2023-11-17 11:57:01,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10853, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12547, PETRI_PLACES=502, PETRI_TRANSITIONS=644} [2023-11-17 11:57:01,735 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 480 predicate places. [2023-11-17 11:57:01,735 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 644 transitions, 12547 flow [2023-11-17 11:57:01,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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 11:57:01,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:01,735 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:57:01,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2023-11-17 11:57:01,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:01,936 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:57:01,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:01,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1037508506, now seen corresponding path program 88 times [2023-11-17 11:57:01,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:01,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150775173] [2023-11-17 11:57:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:01,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:02,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:02,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150775173] [2023-11-17 11:57:02,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150775173] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:02,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10668963] [2023-11-17 11:57:02,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:57:02,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:02,685 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:57:02,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-11-17 11:57:03,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:57:03,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:03,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:57:03,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:03,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:03,406 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:57:03,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:57:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:03,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10668963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:03,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:03,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-17 11:57:03,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325704450] [2023-11-17 11:57:03,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:03,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:57:03,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:03,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:57:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:57:03,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:57:03,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 644 transitions, 12547 flow. Second operand has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:03,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:03,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:57:03,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:57:06,528 INFO L124 PetriNetUnfolderBase]: 3224/6097 cut-off events. [2023-11-17 11:57:06,528 INFO L125 PetriNetUnfolderBase]: For 383393/383393 co-relation queries the response was YES. [2023-11-17 11:57:06,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68367 conditions, 6097 events. 3224/6097 cut-off events. For 383393/383393 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 46494 event pairs, 1388 based on Foata normal form. 16/6093 useless extension candidates. Maximal degree in co-relation 68143. Up to 5373 conditions per place. [2023-11-17 11:57:06,618 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 595 selfloop transitions, 109 changer transitions 4/708 dead transitions. [2023-11-17 11:57:06,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 708 transitions, 15741 flow [2023-11-17 11:57:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 11:57:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 11:57:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 168 transitions. [2023-11-17 11:57:06,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:57:06,619 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 168 transitions. [2023-11-17 11:57:06,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 168 transitions. [2023-11-17 11:57:06,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:57:06,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 168 transitions. [2023-11-17 11:57:06,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 8.0) internal successors, (168), 21 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 11:57:06,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 24.0) internal successors, (528), 22 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:06,620 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 24.0) internal successors, (528), 22 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:06,620 INFO L175 Difference]: Start difference. First operand has 502 places, 644 transitions, 12547 flow. Second operand 21 states and 168 transitions. [2023-11-17 11:57:06,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 708 transitions, 15741 flow [2023-11-17 11:57:08,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 708 transitions, 15390 flow, removed 40 selfloop flow, removed 13 redundant places. [2023-11-17 11:57:08,713 INFO L231 Difference]: Finished difference. Result has 511 places, 647 transitions, 12599 flow [2023-11-17 11:57:08,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=12206, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12599, PETRI_PLACES=511, PETRI_TRANSITIONS=647} [2023-11-17 11:57:08,714 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 489 predicate places. [2023-11-17 11:57:08,714 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 647 transitions, 12599 flow [2023-11-17 11:57:08,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:08,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:08,714 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:57:08,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2023-11-17 11:57:08,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:08,915 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:57:08,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1680681726, now seen corresponding path program 89 times [2023-11-17 11:57:08,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:08,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930443734] [2023-11-17 11:57:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:08,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:57:09,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:09,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930443734] [2023-11-17 11:57:09,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930443734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:09,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830003589] [2023-11-17 11:57:09,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:57:09,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:09,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:09,977 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:57:09,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-11-17 11:57:10,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:57:10,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:10,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 11:57:10,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:10,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:57:10,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:57:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:10,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:10,825 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:57:10,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:57:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:10,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830003589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:10,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:10,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 34 [2023-11-17 11:57:10,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563270794] [2023-11-17 11:57:10,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:10,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 11:57:10,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 11:57:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 11:57:10,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:57:10,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 647 transitions, 12599 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:10,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:10,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:57:10,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:57:14,839 INFO L124 PetriNetUnfolderBase]: 3292/6253 cut-off events. [2023-11-17 11:57:14,839 INFO L125 PetriNetUnfolderBase]: For 408888/408888 co-relation queries the response was YES. [2023-11-17 11:57:14,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71316 conditions, 6253 events. 3292/6253 cut-off events. For 408888/408888 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48094 event pairs, 1392 based on Foata normal form. 24/6257 useless extension candidates. Maximal degree in co-relation 71094. Up to 5269 conditions per place. [2023-11-17 11:57:14,934 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 600 selfloop transitions, 128 changer transitions 10/738 dead transitions. [2023-11-17 11:57:14,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 738 transitions, 16649 flow [2023-11-17 11:57:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 11:57:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 11:57:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 237 transitions. [2023-11-17 11:57:14,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29924242424242425 [2023-11-17 11:57:14,935 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 237 transitions. [2023-11-17 11:57:14,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 237 transitions. [2023-11-17 11:57:14,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:57:14,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 237 transitions. [2023-11-17 11:57:14,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 7.181818181818182) internal successors, (237), 33 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:14,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 24.0) internal successors, (816), 34 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:14,936 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 24.0) internal successors, (816), 34 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:14,936 INFO L175 Difference]: Start difference. First operand has 511 places, 647 transitions, 12599 flow. Second operand 33 states and 237 transitions. [2023-11-17 11:57:14,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 738 transitions, 16649 flow [2023-11-17 11:57:17,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 738 transitions, 16388 flow, removed 49 selfloop flow, removed 16 redundant places. [2023-11-17 11:57:17,072 INFO L231 Difference]: Finished difference. Result has 534 places, 656 transitions, 13090 flow [2023-11-17 11:57:17,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=12374, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=13090, PETRI_PLACES=534, PETRI_TRANSITIONS=656} [2023-11-17 11:57:17,073 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 512 predicate places. [2023-11-17 11:57:17,073 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 656 transitions, 13090 flow [2023-11-17 11:57:17,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:17,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:17,073 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:57:17,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2023-11-17 11:57:17,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:17,281 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:57:17,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:17,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1191543170, now seen corresponding path program 90 times [2023-11-17 11:57:17,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:17,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092555428] [2023-11-17 11:57:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:17,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:17,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:17,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092555428] [2023-11-17 11:57:17,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092555428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:17,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512129582] [2023-11-17 11:57:17,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:57:17,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:17,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:17,917 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:57:17,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-11-17 11:57:18,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:57:18,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:18,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 11:57:18,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:18,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:57:18,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:57:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:18,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:18,879 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 11:57:18,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2023-11-17 11:57:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:18,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512129582] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:18,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:18,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-11-17 11:57:18,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033444516] [2023-11-17 11:57:18,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:18,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:57:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:57:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:57:18,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:57:18,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 656 transitions, 13090 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:18,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:18,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:57:18,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:57:22,489 INFO L124 PetriNetUnfolderBase]: 3333/6335 cut-off events. [2023-11-17 11:57:22,490 INFO L125 PetriNetUnfolderBase]: For 447269/447269 co-relation queries the response was YES. [2023-11-17 11:57:22,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74558 conditions, 6335 events. 3333/6335 cut-off events. For 447269/447269 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 48846 event pairs, 900 based on Foata normal form. 18/6333 useless extension candidates. Maximal degree in co-relation 74324. Up to 5580 conditions per place. [2023-11-17 11:57:22,595 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 616 selfloop transitions, 114 changer transitions 8/738 dead transitions. [2023-11-17 11:57:22,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 738 transitions, 16429 flow [2023-11-17 11:57:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 11:57:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 11:57:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 193 transitions. [2023-11-17 11:57:22,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3496376811594203 [2023-11-17 11:57:22,596 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 193 transitions. [2023-11-17 11:57:22,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 193 transitions. [2023-11-17 11:57:22,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:57:22,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 193 transitions. [2023-11-17 11:57:22,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 8.391304347826088) internal successors, (193), 23 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:22,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:22,597 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:22,597 INFO L175 Difference]: Start difference. First operand has 534 places, 656 transitions, 13090 flow. Second operand 23 states and 193 transitions. [2023-11-17 11:57:22,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 738 transitions, 16429 flow [2023-11-17 11:57:24,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 738 transitions, 15944 flow, removed 126 selfloop flow, removed 24 redundant places. [2023-11-17 11:57:24,925 INFO L231 Difference]: Finished difference. Result has 536 places, 670 transitions, 13627 flow [2023-11-17 11:57:24,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=12623, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=13627, PETRI_PLACES=536, PETRI_TRANSITIONS=670} [2023-11-17 11:57:24,926 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 514 predicate places. [2023-11-17 11:57:24,926 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 670 transitions, 13627 flow [2023-11-17 11:57:24,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:24,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:24,926 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:57:24,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2023-11-17 11:57:25,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2023-11-17 11:57:25,127 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:57:25,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:25,127 INFO L85 PathProgramCache]: Analyzing trace with hash -766216380, now seen corresponding path program 91 times [2023-11-17 11:57:25,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:25,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751190349] [2023-11-17 11:57:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:25,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:25,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:25,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751190349] [2023-11-17 11:57:25,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751190349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:25,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529544958] [2023-11-17 11:57:25,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:57:25,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:25,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:25,646 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:57:25,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2023-11-17 11:57:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:26,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:57:26,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:26,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:57:26,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 34 [2023-11-17 11:57:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:26,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:26,412 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:57:26,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:57:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:26,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529544958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:26,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:26,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-17 11:57:26,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732566437] [2023-11-17 11:57:26,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:26,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:57:26,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:26,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:57:26,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:57:26,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:57:26,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 670 transitions, 13627 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:26,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:26,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:57:26,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:57:29,711 INFO L124 PetriNetUnfolderBase]: 3307/6275 cut-off events. [2023-11-17 11:57:29,712 INFO L125 PetriNetUnfolderBase]: For 448006/448006 co-relation queries the response was YES. [2023-11-17 11:57:29,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74127 conditions, 6275 events. 3307/6275 cut-off events. For 448006/448006 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 48182 event pairs, 1359 based on Foata normal form. 32/6287 useless extension candidates. Maximal degree in co-relation 73896. Up to 5375 conditions per place. [2023-11-17 11:57:29,810 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 631 selfloop transitions, 114 changer transitions 1/746 dead transitions. [2023-11-17 11:57:29,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 746 transitions, 16885 flow [2023-11-17 11:57:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 11:57:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 11:57:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 185 transitions. [2023-11-17 11:57:29,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36706349206349204 [2023-11-17 11:57:29,813 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 185 transitions. [2023-11-17 11:57:29,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 185 transitions. [2023-11-17 11:57:29,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:57:29,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 185 transitions. [2023-11-17 11:57:29,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 8.80952380952381) internal successors, (185), 21 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:29,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 24.0) internal successors, (528), 22 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:29,815 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 24.0) internal successors, (528), 22 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:29,815 INFO L175 Difference]: Start difference. First operand has 536 places, 670 transitions, 13627 flow. Second operand 21 states and 185 transitions. [2023-11-17 11:57:29,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 746 transitions, 16885 flow [2023-11-17 11:57:32,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 746 transitions, 16173 flow, removed 292 selfloop flow, removed 10 redundant places. [2023-11-17 11:57:32,522 INFO L231 Difference]: Finished difference. Result has 550 places, 674 transitions, 13395 flow [2023-11-17 11:57:32,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=12912, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13395, PETRI_PLACES=550, PETRI_TRANSITIONS=674} [2023-11-17 11:57:32,523 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 528 predicate places. [2023-11-17 11:57:32,523 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 674 transitions, 13395 flow [2023-11-17 11:57:32,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:32,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:32,523 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:57:32,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2023-11-17 11:57:32,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2023-11-17 11:57:32,724 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:57:32,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1637376865, now seen corresponding path program 92 times [2023-11-17 11:57:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:32,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155884370] [2023-11-17 11:57:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:32,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:57:33,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:33,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155884370] [2023-11-17 11:57:33,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155884370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:33,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504908841] [2023-11-17 11:57:33,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:57:33,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:33,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:33,755 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:57:33,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2023-11-17 11:57:34,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:57:34,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:34,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:57:34,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:34,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:34,538 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:57:34,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:57:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:34,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504908841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:34,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:34,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 36 [2023-11-17 11:57:34,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350941931] [2023-11-17 11:57:34,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:34,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 11:57:34,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:34,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 11:57:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2023-11-17 11:57:34,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:57:34,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 674 transitions, 13395 flow. Second operand has 36 states, 36 states have (on average 4.861111111111111) internal successors, (175), 36 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:34,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:34,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:57:34,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:57:38,401 INFO L124 PetriNetUnfolderBase]: 3376/6394 cut-off events. [2023-11-17 11:57:38,401 INFO L125 PetriNetUnfolderBase]: For 461927/461927 co-relation queries the response was YES. [2023-11-17 11:57:38,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75563 conditions, 6394 events. 3376/6394 cut-off events. For 461927/461927 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 49154 event pairs, 1414 based on Foata normal form. 46/6428 useless extension candidates. Maximal degree in co-relation 75329. Up to 5584 conditions per place. [2023-11-17 11:57:38,498 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 609 selfloop transitions, 130 changer transitions 0/739 dead transitions. [2023-11-17 11:57:38,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 739 transitions, 16128 flow [2023-11-17 11:57:38,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 11:57:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 11:57:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 181 transitions. [2023-11-17 11:57:38,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3016666666666667 [2023-11-17 11:57:38,499 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 181 transitions. [2023-11-17 11:57:38,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 181 transitions. [2023-11-17 11:57:38,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:57:38,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 181 transitions. [2023-11-17 11:57:38,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 7.24) internal successors, (181), 25 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:38,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 24.0) internal successors, (624), 26 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:38,500 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 24.0) internal successors, (624), 26 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:38,500 INFO L175 Difference]: Start difference. First operand has 550 places, 674 transitions, 13395 flow. Second operand 25 states and 181 transitions. [2023-11-17 11:57:38,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 739 transitions, 16128 flow [2023-11-17 11:57:41,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 739 transitions, 15757 flow, removed 77 selfloop flow, removed 17 redundant places. [2023-11-17 11:57:41,179 INFO L231 Difference]: Finished difference. Result has 559 places, 677 transitions, 13514 flow [2023-11-17 11:57:41,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13028, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13514, PETRI_PLACES=559, PETRI_TRANSITIONS=677} [2023-11-17 11:57:41,179 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 537 predicate places. [2023-11-17 11:57:41,179 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 677 transitions, 13514 flow [2023-11-17 11:57:41,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.861111111111111) internal successors, (175), 36 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:41,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:41,180 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:57:41,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2023-11-17 11:57:41,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2023-11-17 11:57:41,382 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:57:41,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:41,382 INFO L85 PathProgramCache]: Analyzing trace with hash -99843381, now seen corresponding path program 93 times [2023-11-17 11:57:41,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:41,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980232055] [2023-11-17 11:57:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:41,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:57:42,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:42,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980232055] [2023-11-17 11:57:42,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980232055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:42,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173871575] [2023-11-17 11:57:42,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:57:42,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:42,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:42,393 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:57:42,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2023-11-17 11:57:42,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 11:57:42,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:42,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:57:42,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:43,011 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:57:43,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-11-17 11:57:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:43,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:43,161 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 11:57:43,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2023-11-17 11:57:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:43,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173871575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:43,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:43,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 30 [2023-11-17 11:57:43,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362818387] [2023-11-17 11:57:43,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:43,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 11:57:43,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:43,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 11:57:43,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2023-11-17 11:57:43,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:57:43,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 677 transitions, 13514 flow. Second operand has 30 states, 30 states have (on average 5.0) internal successors, (150), 30 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:43,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:43,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:57:43,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:57:46,516 INFO L124 PetriNetUnfolderBase]: 3424/6478 cut-off events. [2023-11-17 11:57:46,516 INFO L125 PetriNetUnfolderBase]: For 462041/462041 co-relation queries the response was YES. [2023-11-17 11:57:46,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76767 conditions, 6478 events. 3424/6478 cut-off events. For 462041/462041 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 49912 event pairs, 1526 based on Foata normal form. 24/6490 useless extension candidates. Maximal degree in co-relation 76525. Up to 5894 conditions per place. [2023-11-17 11:57:46,615 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 620 selfloop transitions, 97 changer transitions 0/717 dead transitions. [2023-11-17 11:57:46,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 717 transitions, 15714 flow [2023-11-17 11:57:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 11:57:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 11:57:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 117 transitions. [2023-11-17 11:57:46,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2867647058823529 [2023-11-17 11:57:46,616 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 117 transitions. [2023-11-17 11:57:46,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 117 transitions. [2023-11-17 11:57:46,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:57:46,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 117 transitions. [2023-11-17 11:57:46,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 6.882352941176471) internal successors, (117), 17 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 11:57:46,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 24.0) internal successors, (432), 18 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:46,617 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 24.0) internal successors, (432), 18 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:46,617 INFO L175 Difference]: Start difference. First operand has 559 places, 677 transitions, 13514 flow. Second operand 17 states and 117 transitions. [2023-11-17 11:57:46,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 717 transitions, 15714 flow [2023-11-17 11:57:49,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 717 transitions, 15391 flow, removed 72 selfloop flow, removed 20 redundant places. [2023-11-17 11:57:49,546 INFO L231 Difference]: Finished difference. Result has 557 places, 680 transitions, 13516 flow [2023-11-17 11:57:49,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13191, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13516, PETRI_PLACES=557, PETRI_TRANSITIONS=680} [2023-11-17 11:57:49,546 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 535 predicate places. [2023-11-17 11:57:49,547 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 680 transitions, 13516 flow [2023-11-17 11:57:49,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.0) internal successors, (150), 30 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:49,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:49,547 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:57:49,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2023-11-17 11:57:49,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:49,747 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:57:49,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash 307822751, now seen corresponding path program 94 times [2023-11-17 11:57:49,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:49,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533201784] [2023-11-17 11:57:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:49,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 11:57:50,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:50,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533201784] [2023-11-17 11:57:50,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533201784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:50,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930187533] [2023-11-17 11:57:50,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:57:50,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:50,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:50,332 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:57:50,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2023-11-17 11:57:50,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:57:50,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:50,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:57:50,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:50,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:51,108 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 11:57:51,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2023-11-17 11:57:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:51,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930187533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:51,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:51,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 29 [2023-11-17 11:57:51,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825212356] [2023-11-17 11:57:51,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:51,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 11:57:51,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 11:57:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-11-17 11:57:51,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:57:51,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 680 transitions, 13516 flow. Second operand has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:51,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:51,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:57:51,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:57:54,260 INFO L124 PetriNetUnfolderBase]: 3472/6562 cut-off events. [2023-11-17 11:57:54,261 INFO L125 PetriNetUnfolderBase]: For 479831/479831 co-relation queries the response was YES. [2023-11-17 11:57:54,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77854 conditions, 6562 events. 3472/6562 cut-off events. For 479831/479831 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 50649 event pairs, 1496 based on Foata normal form. 24/6574 useless extension candidates. Maximal degree in co-relation 77611. Up to 5896 conditions per place. [2023-11-17 11:57:54,369 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 622 selfloop transitions, 111 changer transitions 0/733 dead transitions. [2023-11-17 11:57:54,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 733 transitions, 15919 flow [2023-11-17 11:57:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 11:57:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 11:57:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 131 transitions. [2023-11-17 11:57:54,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3411458333333333 [2023-11-17 11:57:54,370 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 131 transitions. [2023-11-17 11:57:54,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 131 transitions. [2023-11-17 11:57:54,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:57:54,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 131 transitions. [2023-11-17 11:57:54,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.1875) internal successors, (131), 16 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:54,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 24.0) internal successors, (408), 17 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:54,371 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 24.0) internal successors, (408), 17 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:54,371 INFO L175 Difference]: Start difference. First operand has 557 places, 680 transitions, 13516 flow. Second operand 16 states and 131 transitions. [2023-11-17 11:57:54,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 733 transitions, 15919 flow [2023-11-17 11:57:57,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 733 transitions, 15587 flow, removed 52 selfloop flow, removed 16 redundant places. [2023-11-17 11:57:57,455 INFO L231 Difference]: Finished difference. Result has 558 places, 683 transitions, 13584 flow [2023-11-17 11:57:57,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13227, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13584, PETRI_PLACES=558, PETRI_TRANSITIONS=683} [2023-11-17 11:57:57,455 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 536 predicate places. [2023-11-17 11:57:57,455 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 683 transitions, 13584 flow [2023-11-17 11:57:57,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:57,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:57,456 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:57:57,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2023-11-17 11:57:57,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2023-11-17 11:57:57,657 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:57:57,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash -48225473, now seen corresponding path program 95 times [2023-11-17 11:57:57,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:57,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952875912] [2023-11-17 11:57:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:57,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:57:58,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:58,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952875912] [2023-11-17 11:57:58,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952875912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:58,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157443702] [2023-11-17 11:57:58,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:57:58,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:58,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:58,660 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:57:58,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2023-11-17 11:57:59,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:57:59,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:59,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 11:57:59,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:59,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:57:59,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:57:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:59,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:59,638 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:57:59,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:57:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:57:59,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157443702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:59,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:59,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 10] total 35 [2023-11-17 11:57:59,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803208598] [2023-11-17 11:57:59,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:59,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 11:57:59,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 11:57:59,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 11:57:59,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:57:59,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 683 transitions, 13584 flow. Second operand has 35 states, 35 states have (on average 4.8) internal successors, (168), 35 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 11:57:59,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:59,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:57:59,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:04,281 INFO L124 PetriNetUnfolderBase]: 3595/6846 cut-off events. [2023-11-17 11:58:04,282 INFO L125 PetriNetUnfolderBase]: For 511692/511692 co-relation queries the response was YES. [2023-11-17 11:58:04,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81330 conditions, 6846 events. 3595/6846 cut-off events. For 511692/511692 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 53584 event pairs, 993 based on Foata normal form. 26/6860 useless extension candidates. Maximal degree in co-relation 81089. Up to 6065 conditions per place. [2023-11-17 11:58:04,389 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 655 selfloop transitions, 130 changer transitions 5/790 dead transitions. [2023-11-17 11:58:04,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 790 transitions, 17480 flow [2023-11-17 11:58:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 11:58:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 11:58:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 260 transitions. [2023-11-17 11:58:04,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30092592592592593 [2023-11-17 11:58:04,390 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 260 transitions. [2023-11-17 11:58:04,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 260 transitions. [2023-11-17 11:58:04,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:04,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 260 transitions. [2023-11-17 11:58:04,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 7.222222222222222) internal successors, (260), 36 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 11:58:04,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 24.0) internal successors, (888), 37 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:04,392 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 24.0) internal successors, (888), 37 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:04,392 INFO L175 Difference]: Start difference. First operand has 558 places, 683 transitions, 13584 flow. Second operand 36 states and 260 transitions. [2023-11-17 11:58:04,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 790 transitions, 17480 flow [2023-11-17 11:58:07,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 790 transitions, 17161 flow, removed 28 selfloop flow, removed 14 redundant places. [2023-11-17 11:58:07,387 INFO L231 Difference]: Finished difference. Result has 591 places, 711 transitions, 14697 flow [2023-11-17 11:58:07,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13269, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14697, PETRI_PLACES=591, PETRI_TRANSITIONS=711} [2023-11-17 11:58:07,388 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 569 predicate places. [2023-11-17 11:58:07,388 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 711 transitions, 14697 flow [2023-11-17 11:58:07,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.8) internal successors, (168), 35 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 11:58:07,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:58:07,388 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:58:07,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2023-11-17 11:58:07,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2023-11-17 11:58:07,596 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:58:07,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:58:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash 870074263, now seen corresponding path program 96 times [2023-11-17 11:58:07,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:58:07,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599148741] [2023-11-17 11:58:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:58:07,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:58:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:58:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:08,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:58:08,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599148741] [2023-11-17 11:58:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599148741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:58:08,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062227576] [2023-11-17 11:58:08,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:58:08,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:58:08,067 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:58:08,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2023-11-17 11:58:08,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:58:08,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:58:08,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 11:58:08,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:58:08,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:58:08,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-11-17 11:58:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-17 11:58:08,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:58:08,938 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:58:08,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:58:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:09,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062227576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:58:09,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:58:09,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 25 [2023-11-17 11:58:09,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700744506] [2023-11-17 11:58:09,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:58:09,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 11:58:09,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:58:09,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 11:58:09,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-11-17 11:58:09,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:58:09,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 711 transitions, 14697 flow. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 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 11:58:09,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:58:09,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:58:09,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:13,060 INFO L124 PetriNetUnfolderBase]: 3672/7009 cut-off events. [2023-11-17 11:58:13,060 INFO L125 PetriNetUnfolderBase]: For 575085/575085 co-relation queries the response was YES. [2023-11-17 11:58:13,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84738 conditions, 7009 events. 3672/7009 cut-off events. For 575085/575085 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 55093 event pairs, 1421 based on Foata normal form. 72/7069 useless extension candidates. Maximal degree in co-relation 84486. Up to 5838 conditions per place. [2023-11-17 11:58:13,177 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 663 selfloop transitions, 161 changer transitions 3/827 dead transitions. [2023-11-17 11:58:13,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 827 transitions, 18517 flow [2023-11-17 11:58:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 11:58:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 11:58:13,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 253 transitions. [2023-11-17 11:58:13,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35138888888888886 [2023-11-17 11:58:13,179 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 253 transitions. [2023-11-17 11:58:13,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 253 transitions. [2023-11-17 11:58:13,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:13,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 253 transitions. [2023-11-17 11:58:13,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 8.433333333333334) internal successors, (253), 30 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:13,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 24.0) internal successors, (744), 31 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:13,180 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 24.0) internal successors, (744), 31 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:13,180 INFO L175 Difference]: Start difference. First operand has 591 places, 711 transitions, 14697 flow. Second operand 30 states and 253 transitions. [2023-11-17 11:58:13,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 827 transitions, 18517 flow [2023-11-17 11:58:16,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 827 transitions, 17644 flow, removed 368 selfloop flow, removed 18 redundant places. [2023-11-17 11:58:16,572 INFO L231 Difference]: Finished difference. Result has 608 places, 724 transitions, 14766 flow [2023-11-17 11:58:16,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13793, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=14766, PETRI_PLACES=608, PETRI_TRANSITIONS=724} [2023-11-17 11:58:16,573 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 586 predicate places. [2023-11-17 11:58:16,573 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 724 transitions, 14766 flow [2023-11-17 11:58:16,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 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 11:58:16,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:58:16,573 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:58:16,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2023-11-17 11:58:16,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:16,774 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:58:16,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:58:16,774 INFO L85 PathProgramCache]: Analyzing trace with hash -824577759, now seen corresponding path program 97 times [2023-11-17 11:58:16,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:58:16,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065578966] [2023-11-17 11:58:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:58:16,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:58:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:58:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:17,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:58:17,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065578966] [2023-11-17 11:58:17,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065578966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:58:17,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965353463] [2023-11-17 11:58:17,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:58:17,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:17,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:58:17,322 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:58:17,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2023-11-17 11:58:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:58:17,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 11:58:17,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:58:17,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:58:17,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 34 [2023-11-17 11:58:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:18,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:58:18,221 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:58:18,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:58:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:18,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965353463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:58:18,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:58:18,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-11-17 11:58:18,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547244537] [2023-11-17 11:58:18,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:58:18,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 11:58:18,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:58:18,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 11:58:18,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2023-11-17 11:58:18,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:58:18,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 724 transitions, 14766 flow. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:18,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:58:18,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:58:18,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:22,317 INFO L124 PetriNetUnfolderBase]: 3712/7124 cut-off events. [2023-11-17 11:58:22,318 INFO L125 PetriNetUnfolderBase]: For 583872/583872 co-relation queries the response was YES. [2023-11-17 11:58:22,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87639 conditions, 7124 events. 3712/7124 cut-off events. For 583872/583872 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 56390 event pairs, 1010 based on Foata normal form. 22/7134 useless extension candidates. Maximal degree in co-relation 87405. Up to 6187 conditions per place. [2023-11-17 11:58:22,438 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 651 selfloop transitions, 133 changer transitions 5/789 dead transitions. [2023-11-17 11:58:22,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 789 transitions, 18138 flow [2023-11-17 11:58:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 11:58:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 11:58:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 189 transitions. [2023-11-17 11:58:22,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.328125 [2023-11-17 11:58:22,439 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 189 transitions. [2023-11-17 11:58:22,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 189 transitions. [2023-11-17 11:58:22,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:22,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 189 transitions. [2023-11-17 11:58:22,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.875) internal successors, (189), 24 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:22,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 24.0) internal successors, (600), 25 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:22,440 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 24.0) internal successors, (600), 25 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:22,440 INFO L175 Difference]: Start difference. First operand has 608 places, 724 transitions, 14766 flow. Second operand 24 states and 189 transitions. [2023-11-17 11:58:22,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 789 transitions, 18138 flow [2023-11-17 11:58:26,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 789 transitions, 17464 flow, removed 240 selfloop flow, removed 22 redundant places. [2023-11-17 11:58:26,664 INFO L231 Difference]: Finished difference. Result has 612 places, 722 transitions, 14714 flow [2023-11-17 11:58:26,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=14040, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=14714, PETRI_PLACES=612, PETRI_TRANSITIONS=722} [2023-11-17 11:58:26,664 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 590 predicate places. [2023-11-17 11:58:26,664 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 722 transitions, 14714 flow [2023-11-17 11:58:26,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:26,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:58:26,664 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:58:26,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2023-11-17 11:58:26,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:26,865 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:58:26,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:58:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1450254401, now seen corresponding path program 98 times [2023-11-17 11:58:26,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:58:26,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598630200] [2023-11-17 11:58:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:58:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:58:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:58:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:27,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:58:27,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598630200] [2023-11-17 11:58:27,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598630200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:58:27,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360448356] [2023-11-17 11:58:27,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:58:27,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:27,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:58:27,345 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:58:27,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2023-11-17 11:58:27,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:58:27,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:58:27,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 11:58:27,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:58:27,954 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 11:58:27,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 31 [2023-11-17 11:58:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:27,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:58:28,202 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:58:28,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:58:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:28,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360448356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:58:28,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:58:28,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-11-17 11:58:28,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753275604] [2023-11-17 11:58:28,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:58:28,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 11:58:28,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:58:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 11:58:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-11-17 11:58:28,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:58:28,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 722 transitions, 14714 flow. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:28,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:58:28,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:58:28,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:32,136 INFO L124 PetriNetUnfolderBase]: 3667/6987 cut-off events. [2023-11-17 11:58:32,136 INFO L125 PetriNetUnfolderBase]: For 564384/564384 co-relation queries the response was YES. [2023-11-17 11:58:32,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84271 conditions, 6987 events. 3667/6987 cut-off events. For 564384/564384 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 54656 event pairs, 1053 based on Foata normal form. 12/6987 useless extension candidates. Maximal degree in co-relation 84016. Up to 6429 conditions per place. [2023-11-17 11:58:32,258 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 642 selfloop transitions, 110 changer transitions 12/764 dead transitions. [2023-11-17 11:58:32,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 764 transitions, 17119 flow [2023-11-17 11:58:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 11:58:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 11:58:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 152 transitions. [2023-11-17 11:58:32,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30158730158730157 [2023-11-17 11:58:32,259 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 152 transitions. [2023-11-17 11:58:32,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 152 transitions. [2023-11-17 11:58:32,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:32,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 152 transitions. [2023-11-17 11:58:32,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:32,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 24.0) internal successors, (528), 22 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:32,260 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 24.0) internal successors, (528), 22 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:32,260 INFO L175 Difference]: Start difference. First operand has 612 places, 722 transitions, 14714 flow. Second operand 21 states and 152 transitions. [2023-11-17 11:58:32,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 764 transitions, 17119 flow [2023-11-17 11:58:36,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 764 transitions, 16505 flow, removed 187 selfloop flow, removed 18 redundant places. [2023-11-17 11:58:36,291 INFO L231 Difference]: Finished difference. Result has 613 places, 718 transitions, 14293 flow [2023-11-17 11:58:36,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=14103, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=14293, PETRI_PLACES=613, PETRI_TRANSITIONS=718} [2023-11-17 11:58:36,292 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 591 predicate places. [2023-11-17 11:58:36,292 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 718 transitions, 14293 flow [2023-11-17 11:58:36,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:36,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:58:36,292 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:58:36,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2023-11-17 11:58:36,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2023-11-17 11:58:36,493 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:58:36,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:58:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash -662237904, now seen corresponding path program 99 times [2023-11-17 11:58:36,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:58:36,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292194164] [2023-11-17 11:58:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:58:36,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:58:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:58:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:58:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292194164] [2023-11-17 11:58:36,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292194164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:58:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594246554] [2023-11-17 11:58:36,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:58:36,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:36,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:58:36,995 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:58:36,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2023-11-17 11:58:37,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 11:58:37,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:58:37,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 11:58:37,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:58:37,715 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 11:58:37,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-11-17 11:58:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:37,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:58:37,912 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 11:58:37,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2023-11-17 11:58:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:38,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594246554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:58:38,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:58:38,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-11-17 11:58:38,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064775189] [2023-11-17 11:58:38,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:58:38,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:58:38,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:58:38,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:58:38,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:58:38,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:58:38,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 718 transitions, 14293 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:38,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:58:38,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:58:38,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:41,278 INFO L124 PetriNetUnfolderBase]: 3644/6925 cut-off events. [2023-11-17 11:58:41,278 INFO L125 PetriNetUnfolderBase]: For 528313/528313 co-relation queries the response was YES. [2023-11-17 11:58:41,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81910 conditions, 6925 events. 3644/6925 cut-off events. For 528313/528313 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 53939 event pairs, 1058 based on Foata normal form. 8/6921 useless extension candidates. Maximal degree in co-relation 81652. Up to 6493 conditions per place. [2023-11-17 11:58:41,398 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 644 selfloop transitions, 83 changer transitions 14/741 dead transitions. [2023-11-17 11:58:41,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 741 transitions, 16178 flow [2023-11-17 11:58:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:58:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:58:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 93 transitions. [2023-11-17 11:58:41,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229166666666667 [2023-11-17 11:58:41,399 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 93 transitions. [2023-11-17 11:58:41,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 93 transitions. [2023-11-17 11:58:41,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:41,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 93 transitions. [2023-11-17 11:58:41,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 7.75) internal successors, (93), 12 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 11:58:41,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:41,400 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:41,400 INFO L175 Difference]: Start difference. First operand has 613 places, 718 transitions, 14293 flow. Second operand 12 states and 93 transitions. [2023-11-17 11:58:41,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 741 transitions, 16178 flow [2023-11-17 11:58:45,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 741 transitions, 15870 flow, removed 41 selfloop flow, removed 18 redundant places. [2023-11-17 11:58:45,200 INFO L231 Difference]: Finished difference. Result has 602 places, 712 transitions, 14036 flow [2023-11-17 11:58:45,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13984, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14036, PETRI_PLACES=602, PETRI_TRANSITIONS=712} [2023-11-17 11:58:45,200 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 580 predicate places. [2023-11-17 11:58:45,201 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 712 transitions, 14036 flow [2023-11-17 11:58:45,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:45,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:58:45,201 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:58:45,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2023-11-17 11:58:45,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:45,401 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:58:45,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:58:45,402 INFO L85 PathProgramCache]: Analyzing trace with hash 89887587, now seen corresponding path program 100 times [2023-11-17 11:58:45,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:58:45,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123792789] [2023-11-17 11:58:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:58:45,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:58:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:58:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:45,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:58:45,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123792789] [2023-11-17 11:58:45,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123792789] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:58:45,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028591413] [2023-11-17 11:58:45,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:58:45,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:45,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:58:45,877 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:58:45,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2023-11-17 11:58:46,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:58:46,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:58:46,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:58:46,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:58:46,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:58:46,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 34 [2023-11-17 11:58:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:46,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:58:46,597 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:58:46,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:58:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:46,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028591413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:58:46,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:58:46,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-17 11:58:46,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287058267] [2023-11-17 11:58:46,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:58:46,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:58:46,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:58:46,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:58:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:58:46,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:58:46,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 712 transitions, 14036 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:46,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:58:46,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:58:46,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:50,424 INFO L124 PetriNetUnfolderBase]: 3563/6724 cut-off events. [2023-11-17 11:58:50,424 INFO L125 PetriNetUnfolderBase]: For 509503/509503 co-relation queries the response was YES. [2023-11-17 11:58:50,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79290 conditions, 6724 events. 3563/6724 cut-off events. For 509503/509503 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51949 event pairs, 1395 based on Foata normal form. 30/6742 useless extension candidates. Maximal degree in co-relation 79034. Up to 5651 conditions per place. [2023-11-17 11:58:50,541 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 649 selfloop transitions, 132 changer transitions 12/793 dead transitions. [2023-11-17 11:58:50,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 793 transitions, 16942 flow [2023-11-17 11:58:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 11:58:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 11:58:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 218 transitions. [2023-11-17 11:58:50,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33641975308641975 [2023-11-17 11:58:50,542 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 218 transitions. [2023-11-17 11:58:50,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 218 transitions. [2023-11-17 11:58:50,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:50,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 218 transitions. [2023-11-17 11:58:50,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 8.074074074074074) internal successors, (218), 27 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 11:58:50,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 24.0) internal successors, (672), 28 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:50,543 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 24.0) internal successors, (672), 28 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:50,543 INFO L175 Difference]: Start difference. First operand has 602 places, 712 transitions, 14036 flow. Second operand 27 states and 218 transitions. [2023-11-17 11:58:50,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 793 transitions, 16942 flow [2023-11-17 11:58:54,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 793 transitions, 16741 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-11-17 11:58:54,210 INFO L231 Difference]: Finished difference. Result has 613 places, 702 transitions, 14000 flow [2023-11-17 11:58:54,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13673, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14000, PETRI_PLACES=613, PETRI_TRANSITIONS=702} [2023-11-17 11:58:54,211 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 591 predicate places. [2023-11-17 11:58:54,211 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 702 transitions, 14000 flow [2023-11-17 11:58:54,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:54,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:58:54,211 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:58:54,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2023-11-17 11:58:54,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:54,415 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:58:54,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:58:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1809057704, now seen corresponding path program 101 times [2023-11-17 11:58:54,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:58:54,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140768117] [2023-11-17 11:58:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:58:54,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:58:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:58:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:54,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:58:54,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140768117] [2023-11-17 11:58:54,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140768117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:58:54,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631464337] [2023-11-17 11:58:54,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:58:54,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:54,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:58:54,899 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:58:54,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2023-11-17 11:58:55,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:58:55,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:58:55,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 11:58:55,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:58:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:55,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:58:55,787 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 11:58:55,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2023-11-17 11:58:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:58:55,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631464337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:58:55,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:58:55,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2023-11-17 11:58:55,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988977987] [2023-11-17 11:58:55,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:58:55,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 11:58:55,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:58:55,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 11:58:55,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-11-17 11:58:55,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:58:55,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 702 transitions, 14000 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 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 11:58:55,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:58:55,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:58:55,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:59,009 INFO L124 PetriNetUnfolderBase]: 3503/6602 cut-off events. [2023-11-17 11:58:59,009 INFO L125 PetriNetUnfolderBase]: For 505241/505241 co-relation queries the response was YES. [2023-11-17 11:58:59,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78151 conditions, 6602 events. 3503/6602 cut-off events. For 505241/505241 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 50541 event pairs, 1563 based on Foata normal form. 16/6606 useless extension candidates. Maximal degree in co-relation 77893. Up to 6101 conditions per place. [2023-11-17 11:58:59,117 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 631 selfloop transitions, 92 changer transitions 6/729 dead transitions. [2023-11-17 11:58:59,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 729 transitions, 16076 flow [2023-11-17 11:58:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 11:58:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 11:58:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 102 transitions. [2023-11-17 11:58:59,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269230769230769 [2023-11-17 11:58:59,118 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 102 transitions. [2023-11-17 11:58:59,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 102 transitions. [2023-11-17 11:58:59,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:59,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 102 transitions. [2023-11-17 11:58:59,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:59,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:59,119 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:59,119 INFO L175 Difference]: Start difference. First operand has 613 places, 702 transitions, 14000 flow. Second operand 13 states and 102 transitions. [2023-11-17 11:58:59,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 729 transitions, 16076 flow [2023-11-17 11:59:02,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 729 transitions, 15774 flow, removed 36 selfloop flow, removed 21 redundant places. [2023-11-17 11:59:02,425 INFO L231 Difference]: Finished difference. Result has 599 places, 696 transitions, 13742 flow [2023-11-17 11:59:02,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13625, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13742, PETRI_PLACES=599, PETRI_TRANSITIONS=696} [2023-11-17 11:59:02,426 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 577 predicate places. [2023-11-17 11:59:02,426 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 696 transitions, 13742 flow [2023-11-17 11:59:02,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 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 11:59:02,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:02,426 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:02,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2023-11-17 11:59:02,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2023-11-17 11:59:02,627 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:59:02,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:02,627 INFO L85 PathProgramCache]: Analyzing trace with hash 793872345, now seen corresponding path program 102 times [2023-11-17 11:59:02,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:02,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880796729] [2023-11-17 11:59:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:02,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:03,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:03,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880796729] [2023-11-17 11:59:03,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880796729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:03,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956108371] [2023-11-17 11:59:03,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:59:03,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:03,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:03,116 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:59:03,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2023-11-17 11:59:03,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:59:03,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:59:03,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:59:03,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:03,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:59:03,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:59:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:03,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:03,952 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 11:59:03,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2023-11-17 11:59:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:04,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956108371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:59:04,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:59:04,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2023-11-17 11:59:04,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794118047] [2023-11-17 11:59:04,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:59:04,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 11:59:04,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 11:59:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-11-17 11:59:04,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:59:04,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 696 transitions, 13742 flow. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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 11:59:04,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:04,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:59:04,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:07,267 INFO L124 PetriNetUnfolderBase]: 3495/6576 cut-off events. [2023-11-17 11:59:07,267 INFO L125 PetriNetUnfolderBase]: For 503061/503061 co-relation queries the response was YES. [2023-11-17 11:59:07,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77804 conditions, 6576 events. 3495/6576 cut-off events. For 503061/503061 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 50267 event pairs, 1458 based on Foata normal form. 12/6576 useless extension candidates. Maximal degree in co-relation 77547. Up to 5785 conditions per place. [2023-11-17 11:59:07,385 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 634 selfloop transitions, 103 changer transitions 4/741 dead transitions. [2023-11-17 11:59:07,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 741 transitions, 16215 flow [2023-11-17 11:59:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 11:59:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 11:59:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2023-11-17 11:59:07,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3388888888888889 [2023-11-17 11:59:07,386 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 122 transitions. [2023-11-17 11:59:07,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 122 transitions. [2023-11-17 11:59:07,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:07,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 122 transitions. [2023-11-17 11:59:07,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 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 11:59:07,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 24.0) internal successors, (384), 16 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:07,387 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 24.0) internal successors, (384), 16 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:07,387 INFO L175 Difference]: Start difference. First operand has 599 places, 696 transitions, 13742 flow. Second operand 15 states and 122 transitions. [2023-11-17 11:59:07,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 741 transitions, 16215 flow [2023-11-17 11:59:10,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 741 transitions, 16012 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-11-17 11:59:10,730 INFO L231 Difference]: Finished difference. Result has 598 places, 692 transitions, 13852 flow [2023-11-17 11:59:10,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13479, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13852, PETRI_PLACES=598, PETRI_TRANSITIONS=692} [2023-11-17 11:59:10,730 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 576 predicate places. [2023-11-17 11:59:10,730 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 692 transitions, 13852 flow [2023-11-17 11:59:10,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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 11:59:10,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:10,731 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:10,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2023-11-17 11:59:10,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:10,931 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:59:10,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:10,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1769277054, now seen corresponding path program 103 times [2023-11-17 11:59:10,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:10,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950316209] [2023-11-17 11:59:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:10,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:11,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:11,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950316209] [2023-11-17 11:59:11,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950316209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:11,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826663019] [2023-11-17 11:59:11,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:59:11,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:11,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:11,483 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:59:11,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2023-11-17 11:59:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:11,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:59:11,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:12,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:59:12,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 34 [2023-11-17 11:59:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:12,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:12,294 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 11:59:12,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2023-11-17 11:59:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:12,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826663019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:59:12,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:59:12,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-17 11:59:12,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683104619] [2023-11-17 11:59:12,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:59:12,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:59:12,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:12,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:59:12,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:59:12,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:59:12,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 692 transitions, 13852 flow. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:12,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:12,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:59:12,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:15,438 INFO L124 PetriNetUnfolderBase]: 3469/6512 cut-off events. [2023-11-17 11:59:15,439 INFO L125 PetriNetUnfolderBase]: For 498254/498254 co-relation queries the response was YES. [2023-11-17 11:59:15,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77505 conditions, 6512 events. 3469/6512 cut-off events. For 498254/498254 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 49576 event pairs, 1556 based on Foata normal form. 8/6508 useless extension candidates. Maximal degree in co-relation 77247. Up to 6073 conditions per place. [2023-11-17 11:59:15,549 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 619 selfloop transitions, 90 changer transitions 4/713 dead transitions. [2023-11-17 11:59:15,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 713 transitions, 15799 flow [2023-11-17 11:59:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:59:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:59:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2023-11-17 11:59:15,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 11:59:15,549 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 90 transitions. [2023-11-17 11:59:15,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 90 transitions. [2023-11-17 11:59:15,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:15,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 90 transitions. [2023-11-17 11:59:15,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 7.5) internal successors, (90), 12 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 11:59:15,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:15,550 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:15,550 INFO L175 Difference]: Start difference. First operand has 598 places, 692 transitions, 13852 flow. Second operand 12 states and 90 transitions. [2023-11-17 11:59:15,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 713 transitions, 15799 flow [2023-11-17 11:59:19,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 713 transitions, 15471 flow, removed 67 selfloop flow, removed 13 redundant places. [2023-11-17 11:59:19,054 INFO L231 Difference]: Finished difference. Result has 592 places, 690 transitions, 13689 flow [2023-11-17 11:59:19,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13521, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13689, PETRI_PLACES=592, PETRI_TRANSITIONS=690} [2023-11-17 11:59:19,054 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 570 predicate places. [2023-11-17 11:59:19,054 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 690 transitions, 13689 flow [2023-11-17 11:59:19,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:19,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:19,054 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:19,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2023-11-17 11:59:19,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2023-11-17 11:59:19,255 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:59:19,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1448066812, now seen corresponding path program 104 times [2023-11-17 11:59:19,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:19,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350627515] [2023-11-17 11:59:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:19,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:19,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:19,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350627515] [2023-11-17 11:59:19,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350627515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:19,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553942842] [2023-11-17 11:59:19,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:59:19,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:19,820 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:59:19,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2023-11-17 11:59:20,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:59:20,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:59:20,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:59:20,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:20,423 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 11:59:20,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 9 [2023-11-17 11:59:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:20,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:20,547 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:59:20,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:59:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:20,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553942842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:59:20,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:59:20,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-17 11:59:20,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517491143] [2023-11-17 11:59:20,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:59:20,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:59:20,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:20,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:59:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:59:20,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:59:20,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 690 transitions, 13689 flow. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:20,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:20,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:59:20,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:24,079 INFO L124 PetriNetUnfolderBase]: 3575/6720 cut-off events. [2023-11-17 11:59:24,079 INFO L125 PetriNetUnfolderBase]: For 512036/512036 co-relation queries the response was YES. [2023-11-17 11:59:24,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81257 conditions, 6720 events. 3575/6720 cut-off events. For 512036/512036 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 51420 event pairs, 1639 based on Foata normal form. 16/6724 useless extension candidates. Maximal degree in co-relation 81001. Up to 6303 conditions per place. [2023-11-17 11:59:24,286 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 711 selfloop transitions, 60 changer transitions 4/775 dead transitions. [2023-11-17 11:59:24,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 775 transitions, 18113 flow [2023-11-17 11:59:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:59:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:59:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 173 transitions. [2023-11-17 11:59:24,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36041666666666666 [2023-11-17 11:59:24,287 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 173 transitions. [2023-11-17 11:59:24,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 173 transitions. [2023-11-17 11:59:24,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:24,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 173 transitions. [2023-11-17 11:59:24,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.65) internal successors, (173), 20 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:24,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:24,288 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 24.0) internal successors, (504), 21 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:24,288 INFO L175 Difference]: Start difference. First operand has 592 places, 690 transitions, 13689 flow. Second operand 20 states and 173 transitions. [2023-11-17 11:59:24,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 775 transitions, 18113 flow [2023-11-17 11:59:27,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 775 transitions, 17927 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-17 11:59:27,766 INFO L231 Difference]: Finished difference. Result has 605 places, 705 transitions, 14575 flow [2023-11-17 11:59:27,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=13481, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14575, PETRI_PLACES=605, PETRI_TRANSITIONS=705} [2023-11-17 11:59:27,767 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 583 predicate places. [2023-11-17 11:59:27,767 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 705 transitions, 14575 flow [2023-11-17 11:59:27,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:27,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:27,767 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:27,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2023-11-17 11:59:27,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:27,968 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:59:27,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1355414396, now seen corresponding path program 105 times [2023-11-17 11:59:27,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:27,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290867181] [2023-11-17 11:59:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:27,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:28,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:28,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290867181] [2023-11-17 11:59:28,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290867181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:28,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263622066] [2023-11-17 11:59:28,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:59:28,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:28,635 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:59:28,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2023-11-17 11:59:29,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 11:59:29,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:59:29,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-17 11:59:29,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:29,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:59:29,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-11-17 11:59:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-17 11:59:29,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:29,630 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:59:29,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 11:59:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:29,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263622066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:59:29,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:59:29,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 26 [2023-11-17 11:59:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583160003] [2023-11-17 11:59:29,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:59:29,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:59:29,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:29,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:59:29,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:59:29,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:59:29,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 705 transitions, 14575 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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 11:59:29,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:29,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:59:29,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:33,878 INFO L124 PetriNetUnfolderBase]: 3645/6872 cut-off events. [2023-11-17 11:59:33,878 INFO L125 PetriNetUnfolderBase]: For 580161/580161 co-relation queries the response was YES. [2023-11-17 11:59:33,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86102 conditions, 6872 events. 3645/6872 cut-off events. For 580161/580161 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 52967 event pairs, 1040 based on Foata normal form. 10/6870 useless extension candidates. Maximal degree in co-relation 85840. Up to 6451 conditions per place. [2023-11-17 11:59:33,997 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 719 selfloop transitions, 77 changer transitions 11/807 dead transitions. [2023-11-17 11:59:33,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 807 transitions, 18662 flow [2023-11-17 11:59:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 11:59:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 11:59:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 247 transitions. [2023-11-17 11:59:33,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36755952380952384 [2023-11-17 11:59:33,999 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 247 transitions. [2023-11-17 11:59:33,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 247 transitions. [2023-11-17 11:59:33,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:33,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 247 transitions. [2023-11-17 11:59:33,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 8.821428571428571) internal successors, (247), 28 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:33,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 24.0) internal successors, (696), 29 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:34,000 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 24.0) internal successors, (696), 29 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:34,000 INFO L175 Difference]: Start difference. First operand has 605 places, 705 transitions, 14575 flow. Second operand 28 states and 247 transitions. [2023-11-17 11:59:34,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 807 transitions, 18662 flow [2023-11-17 11:59:37,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 807 transitions, 18117 flow, removed 224 selfloop flow, removed 10 redundant places. [2023-11-17 11:59:37,606 INFO L231 Difference]: Finished difference. Result has 629 places, 717 transitions, 15009 flow [2023-11-17 11:59:37,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=14030, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=15009, PETRI_PLACES=629, PETRI_TRANSITIONS=717} [2023-11-17 11:59:37,607 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 607 predicate places. [2023-11-17 11:59:37,607 INFO L495 AbstractCegarLoop]: Abstraction has has 629 places, 717 transitions, 15009 flow [2023-11-17 11:59:37,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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 11:59:37,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:37,607 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:37,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2023-11-17 11:59:37,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2023-11-17 11:59:37,809 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:59:37,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash 518645708, now seen corresponding path program 106 times [2023-11-17 11:59:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:37,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989117103] [2023-11-17 11:59:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:59:38,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:38,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989117103] [2023-11-17 11:59:38,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989117103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:38,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503627263] [2023-11-17 11:59:38,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:59:38,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:38,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:38,763 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:59:38,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2023-11-17 11:59:39,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:59:39,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:59:39,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:59:39,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:39,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:59:39,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 34 [2023-11-17 11:59:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:39,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:39,569 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 11:59:39,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2023-11-17 11:59:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:39,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503627263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:59:39,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:59:39,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 35 [2023-11-17 11:59:39,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213342625] [2023-11-17 11:59:39,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:59:39,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 11:59:39,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 11:59:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 11:59:39,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:59:39,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 717 transitions, 15009 flow. Second operand has 35 states, 35 states have (on average 4.714285714285714) internal successors, (165), 35 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:39,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:39,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:59:39,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:43,912 INFO L124 PetriNetUnfolderBase]: 3650/6878 cut-off events. [2023-11-17 11:59:43,912 INFO L125 PetriNetUnfolderBase]: For 608214/608214 co-relation queries the response was YES. [2023-11-17 11:59:44,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86630 conditions, 6878 events. 3650/6878 cut-off events. For 608214/608214 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 52955 event pairs, 1673 based on Foata normal form. 26/6892 useless extension candidates. Maximal degree in co-relation 86358. Up to 6459 conditions per place. [2023-11-17 11:59:44,045 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 714 selfloop transitions, 80 changer transitions 3/797 dead transitions. [2023-11-17 11:59:44,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 797 transitions, 19035 flow [2023-11-17 11:59:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 11:59:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 11:59:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 222 transitions. [2023-11-17 11:59:44,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30833333333333335 [2023-11-17 11:59:44,046 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 222 transitions. [2023-11-17 11:59:44,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 222 transitions. [2023-11-17 11:59:44,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:44,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 222 transitions. [2023-11-17 11:59:44,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 7.4) internal successors, (222), 30 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:44,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 24.0) internal successors, (744), 31 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:44,047 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 24.0) internal successors, (744), 31 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:44,047 INFO L175 Difference]: Start difference. First operand has 629 places, 717 transitions, 15009 flow. Second operand 30 states and 222 transitions. [2023-11-17 11:59:44,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 797 transitions, 19035 flow [2023-11-17 11:59:48,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 797 transitions, 18397 flow, removed 281 selfloop flow, removed 16 redundant places. [2023-11-17 11:59:48,061 INFO L231 Difference]: Finished difference. Result has 652 places, 730 transitions, 15182 flow [2023-11-17 11:59:48,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=14337, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=15182, PETRI_PLACES=652, PETRI_TRANSITIONS=730} [2023-11-17 11:59:48,062 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 630 predicate places. [2023-11-17 11:59:48,062 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 730 transitions, 15182 flow [2023-11-17 11:59:48,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.714285714285714) internal successors, (165), 35 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:48,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:48,062 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:48,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2023-11-17 11:59:48,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2023-11-17 11:59:48,263 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:59:48,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:48,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1416557500, now seen corresponding path program 107 times [2023-11-17 11:59:48,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:48,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245455245] [2023-11-17 11:59:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:48,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:48,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:48,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245455245] [2023-11-17 11:59:48,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245455245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:48,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225181143] [2023-11-17 11:59:48,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:59:48,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:48,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:48,740 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:59:48,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2023-11-17 11:59:49,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:59:49,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:59:49,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:59:49,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:49,359 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:59:49,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-11-17 11:59:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:49,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:49,497 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 11:59:49,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2023-11-17 11:59:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:49,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225181143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:59:49,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:59:49,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2023-11-17 11:59:49,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864418044] [2023-11-17 11:59:49,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:59:49,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 11:59:49,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:49,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 11:59:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-17 11:59:49,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 11:59:49,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 730 transitions, 15182 flow. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:49,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:49,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 11:59:49,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:53,432 INFO L124 PetriNetUnfolderBase]: 3670/6914 cut-off events. [2023-11-17 11:59:53,432 INFO L125 PetriNetUnfolderBase]: For 639219/639219 co-relation queries the response was YES. [2023-11-17 11:59:53,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88930 conditions, 6914 events. 3670/6914 cut-off events. For 639219/639219 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 53289 event pairs, 1752 based on Foata normal form. 8/6910 useless extension candidates. Maximal degree in co-relation 88645. Up to 6723 conditions per place. [2023-11-17 11:59:53,561 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 722 selfloop transitions, 44 changer transitions 0/766 dead transitions. [2023-11-17 11:59:53,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 766 transitions, 17957 flow [2023-11-17 11:59:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 11:59:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 11:59:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 129 transitions. [2023-11-17 11:59:53,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2986111111111111 [2023-11-17 11:59:53,562 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 129 transitions. [2023-11-17 11:59:53,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 129 transitions. [2023-11-17 11:59:53,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:53,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 129 transitions. [2023-11-17 11:59:53,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.166666666666667) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 24.0) internal successors, (456), 19 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,563 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 24.0) internal successors, (456), 19 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,563 INFO L175 Difference]: Start difference. First operand has 652 places, 730 transitions, 15182 flow. Second operand 18 states and 129 transitions. [2023-11-17 11:59:53,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 766 transitions, 17957 flow [2023-11-17 11:59:58,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 766 transitions, 17408 flow, removed 239 selfloop flow, removed 17 redundant places. [2023-11-17 11:59:58,682 INFO L231 Difference]: Finished difference. Result has 656 places, 734 transitions, 14953 flow [2023-11-17 11:59:58,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=14645, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=14953, PETRI_PLACES=656, PETRI_TRANSITIONS=734} [2023-11-17 11:59:58,683 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 634 predicate places. [2023-11-17 11:59:58,683 INFO L495 AbstractCegarLoop]: Abstraction has has 656 places, 734 transitions, 14953 flow [2023-11-17 11:59:58,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:58,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:58,683 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:58,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2023-11-17 11:59:58,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2023-11-17 11:59:58,884 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:59:58,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:58,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1595197210, now seen corresponding path program 108 times [2023-11-17 11:59:58,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:58,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838183010] [2023-11-17 11:59:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:58,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 11:59:59,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:59,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838183010] [2023-11-17 11:59:59,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838183010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:59,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423062460] [2023-11-17 11:59:59,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:59:59,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:59,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:59,349 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:59:59,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2023-11-17 11:59:59,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:59:59,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:59:59,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:59:59,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 12:00:00,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:00,276 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 12:00:00,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2023-11-17 12:00:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 12:00:00,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423062460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:00,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:00,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2023-11-17 12:00:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477408058] [2023-11-17 12:00:00,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:00,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:00:00,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:00:00,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:00:00,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 12:00:00,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 734 transitions, 14953 flow. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 12:00:00,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:00,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 12:00:00,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:04,038 INFO L124 PetriNetUnfolderBase]: 3694/6954 cut-off events. [2023-11-17 12:00:04,038 INFO L125 PetriNetUnfolderBase]: For 653669/653669 co-relation queries the response was YES. [2023-11-17 12:00:04,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89476 conditions, 6954 events. 3694/6954 cut-off events. For 653669/653669 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 53654 event pairs, 1738 based on Foata normal form. 8/6950 useless extension candidates. Maximal degree in co-relation 89193. Up to 6716 conditions per place. [2023-11-17 12:00:04,172 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 724 selfloop transitions, 54 changer transitions 0/778 dead transitions. [2023-11-17 12:00:04,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 778 transitions, 18072 flow [2023-11-17 12:00:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:00:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:00:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 155 transitions. [2023-11-17 12:00:04,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2935606060606061 [2023-11-17 12:00:04,173 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 155 transitions. [2023-11-17 12:00:04,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 155 transitions. [2023-11-17 12:00:04,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:04,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 155 transitions. [2023-11-17 12:00:04,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:04,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:04,174 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 24.0) internal successors, (552), 23 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:04,174 INFO L175 Difference]: Start difference. First operand has 656 places, 734 transitions, 14953 flow. Second operand 22 states and 155 transitions. [2023-11-17 12:00:04,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 778 transitions, 18072 flow [2023-11-17 12:00:09,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 663 places, 778 transitions, 17820 flow, removed 75 selfloop flow, removed 14 redundant places. [2023-11-17 12:00:09,096 INFO L231 Difference]: Finished difference. Result has 665 places, 738 transitions, 15101 flow [2023-11-17 12:00:09,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=14773, PETRI_DIFFERENCE_MINUEND_PLACES=642, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15101, PETRI_PLACES=665, PETRI_TRANSITIONS=738} [2023-11-17 12:00:09,097 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 643 predicate places. [2023-11-17 12:00:09,097 INFO L495 AbstractCegarLoop]: Abstraction has has 665 places, 738 transitions, 15101 flow [2023-11-17 12:00:09,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 12:00:09,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:09,097 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:09,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:09,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2023-11-17 12:00:09,298 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:09,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:09,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1548864506, now seen corresponding path program 109 times [2023-11-17 12:00:09,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:09,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158240829] [2023-11-17 12:00:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:09,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 12:00:09,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:09,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158240829] [2023-11-17 12:00:09,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158240829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:09,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085263196] [2023-11-17 12:00:09,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:00:09,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:09,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:09,807 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:09,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2023-11-17 12:00:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:10,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:00:10,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:10,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:10,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 34 [2023-11-17 12:00:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 12:00:10,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:10,632 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 12:00:10,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2023-11-17 12:00:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 12:00:10,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085263196] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:10,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:10,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2023-11-17 12:00:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869381628] [2023-11-17 12:00:10,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:10,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:00:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:00:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:00:10,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 12:00:10,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 665 places, 738 transitions, 15101 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:10,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:10,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 12:00:10,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:15,091 INFO L124 PetriNetUnfolderBase]: 3762/7092 cut-off events. [2023-11-17 12:00:15,092 INFO L125 PetriNetUnfolderBase]: For 689433/689433 co-relation queries the response was YES. [2023-11-17 12:00:15,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92876 conditions, 7092 events. 3762/7092 cut-off events. For 689433/689433 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 55003 event pairs, 1702 based on Foata normal form. 8/7088 useless extension candidates. Maximal degree in co-relation 92591. Up to 6608 conditions per place. [2023-11-17 12:00:15,335 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 732 selfloop transitions, 84 changer transitions 3/819 dead transitions. [2023-11-17 12:00:15,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 819 transitions, 19518 flow [2023-11-17 12:00:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:00:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:00:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 205 transitions. [2023-11-17 12:00:15,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31635802469135804 [2023-11-17 12:00:15,336 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 205 transitions. [2023-11-17 12:00:15,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 205 transitions. [2023-11-17 12:00:15,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:15,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 205 transitions. [2023-11-17 12:00:15,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.592592592592593) internal successors, (205), 27 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:15,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 24.0) internal successors, (672), 28 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:15,337 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 24.0) internal successors, (672), 28 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:15,337 INFO L175 Difference]: Start difference. First operand has 665 places, 738 transitions, 15101 flow. Second operand 27 states and 205 transitions. [2023-11-17 12:00:15,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 819 transitions, 19518 flow [2023-11-17 12:00:20,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 819 transitions, 19253 flow, removed 73 selfloop flow, removed 21 redundant places. [2023-11-17 12:00:20,635 INFO L231 Difference]: Finished difference. Result has 674 places, 751 transitions, 15739 flow [2023-11-17 12:00:20,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=14910, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15739, PETRI_PLACES=674, PETRI_TRANSITIONS=751} [2023-11-17 12:00:20,635 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 652 predicate places. [2023-11-17 12:00:20,636 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 751 transitions, 15739 flow [2023-11-17 12:00:20,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:20,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:20,636 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:20,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2023-11-17 12:00:20,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:20,836 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:20,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1391151613, now seen corresponding path program 110 times [2023-11-17 12:00:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869989449] [2023-11-17 12:00:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 12:00:21,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:21,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869989449] [2023-11-17 12:00:21,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869989449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:21,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141582818] [2023-11-17 12:00:21,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:00:21,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:21,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:21,389 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:21,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2023-11-17 12:00:21,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:00:21,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:21,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 12:00:21,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:22,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:22,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2023-11-17 12:00:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 12:00:22,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:22,180 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 12:00:22,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-11-17 12:00:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-17 12:00:22,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141582818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:22,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:22,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2023-11-17 12:00:22,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414467498] [2023-11-17 12:00:22,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:22,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:00:22,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:22,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:00:22,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:00:22,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2023-11-17 12:00:22,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 751 transitions, 15739 flow. Second operand has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:22,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:22,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2023-11-17 12:00:22,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-17 12:00:23,456 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 12:00:23,456 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:00:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:00:23,466 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:00:23,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2023-11-17 12:00:23,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:23,666 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (27states, 3/24 universal loopers) in iteration 119,while PetriNetUnfolder was constructing finite prefix that currently has 20703 conditions, 1768 events (982/1767 cut-off events. For 165477/165477 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 12815 event pairs, 500 based on Foata normal form. 1/2243 useless extension candidates. Maximal degree in co-relation 20462. Up to 1621 conditions per place.). [2023-11-17 12:00:23,668 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:00:23,668 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:00:23,668 INFO L445 BasicCegarLoop]: Path program histogram: [110, 6, 1, 1, 1] [2023-11-17 12:00:23,672 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:00:23,672 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:00:23,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:00:23 BasicIcfg [2023-11-17 12:00:23,674 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:00:23,674 INFO L158 Benchmark]: Toolchain (without parser) took 477557.58ms. Allocated memory was 283.1MB in the beginning and 6.8GB in the end (delta: 6.6GB). Free memory was 242.3MB in the beginning and 5.0GB in the end (delta: -4.8GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2023-11-17 12:00:23,674 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 183.5MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:00:23,674 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.86ms. Allocated memory is still 283.1MB. Free memory was 242.3MB in the beginning and 230.3MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:00:23,674 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.12ms. Allocated memory is still 283.1MB. Free memory was 230.3MB in the beginning and 228.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:00:23,674 INFO L158 Benchmark]: Boogie Preprocessor took 35.00ms. Allocated memory is still 283.1MB. Free memory was 227.6MB in the beginning and 226.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:00:23,674 INFO L158 Benchmark]: RCFGBuilder took 904.39ms. Allocated memory is still 283.1MB. Free memory was 226.1MB in the beginning and 159.5MB in the end (delta: 66.6MB). Peak memory consumption was 67.1MB. Max. memory is 8.0GB. [2023-11-17 12:00:23,675 INFO L158 Benchmark]: TraceAbstraction took 476279.40ms. Allocated memory was 283.1MB in the beginning and 6.8GB in the end (delta: 6.6GB). Free memory was 159.0MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. [2023-11-17 12:00:23,675 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 183.5MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 286.86ms. Allocated memory is still 283.1MB. Free memory was 242.3MB in the beginning and 230.3MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 46.12ms. Allocated memory is still 283.1MB. Free memory was 230.3MB in the beginning and 228.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.00ms. Allocated memory is still 283.1MB. Free memory was 227.6MB in the beginning and 226.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 904.39ms. Allocated memory is still 283.1MB. Free memory was 226.1MB in the beginning and 159.5MB in the end (delta: 66.6MB). Peak memory consumption was 67.1MB. Max. memory is 8.0GB. * TraceAbstraction took 476279.40ms. Allocated memory was 283.1MB in the beginning and 6.8GB in the end (delta: 6.6GB). Free memory was 159.0MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 23 PlacesBefore, 22 PlacesAfterwards, 20 TransitionsBefore, 19 TransitionsAfterwards, 54 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 54 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 54, independent: 52, independent conditional: 0, independent unconditional: 52, 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: 26, independent: 25, independent conditional: 0, independent unconditional: 25, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 26, independent: 25, independent conditional: 0, independent unconditional: 25, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 9, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 54, independent: 27, independent conditional: 0, independent unconditional: 27, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 26, unknown conditional: 0, unknown unconditional: 26] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (27states, 3/24 universal loopers) in iteration 119,while PetriNetUnfolder was constructing finite prefix that currently has 20703 conditions, 1768 events (982/1767 cut-off events. For 165477/165477 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 12815 event pairs, 500 based on Foata normal form. 1/2243 useless extension candidates. Maximal degree in co-relation 20462. Up to 1621 conditions per place.). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (27states, 3/24 universal loopers) in iteration 119,while PetriNetUnfolder was constructing finite prefix that currently has 20703 conditions, 1768 events (982/1767 cut-off events. For 165477/165477 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 12815 event pairs, 500 based on Foata normal form. 1/2243 useless extension candidates. Maximal degree in co-relation 20462. Up to 1621 conditions per place.). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (27states, 3/24 universal loopers) in iteration 119,while PetriNetUnfolder was constructing finite prefix that currently has 20703 conditions, 1768 events (982/1767 cut-off events. For 165477/165477 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 12815 event pairs, 500 based on Foata normal form. 1/2243 useless extension candidates. Maximal degree in co-relation 20462. Up to 1621 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 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: 476.2s, OverallIterations: 119, TraceHistogramMax: 5, PathProgramHistogramMax: 110, EmptinessCheckTime: 0.0s, AutomataDifference: 285.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10349 SdHoareTripleChecker+Valid, 39.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10349 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 33.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 69 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1714 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 78227 IncrementalHoareTripleChecker+Invalid, 80010 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1714 mSolverCounterUnsat, 0 mSDtfsCounter, 78227 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8755 GetRequests, 5149 SyntacticMatches, 5 SemanticMatches, 3601 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32579 ImplicationChecksByTransitivity, 58.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15739occurred in iteration=118, InterpolantAutomatonStates: 1806, 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: 2.5s SsaConstructionTime, 9.5s SatisfiabilityAnalysisTime, 124.7s InterpolantComputationTime, 6599 NumberOfCodeBlocks, 6489 NumberOfCodeBlocksAsserted, 401 NumberOfCheckSat, 9449 ConstructedInterpolants, 28 QuantifiedInterpolants, 91524 SizeOfPredicates, 1682 NumberOfNonLiveVariables, 37335 ConjunctsInSsa, 3884 ConjunctsInUnsatCore, 345 InterpolantComputations, 7 PerfectInterpolantSequences, 10249/12034 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