/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-word-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:59:49,150 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:59:49,210 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 11:59:49,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:59:49,240 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:59:49,240 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:59:49,241 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:59:49,241 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:59:49,241 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:59:49,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:59:49,245 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:59:49,246 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:59:49,246 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:59:49,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:59:49,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:59:49,247 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:59:49,247 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:59:49,247 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:59:49,247 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:59:49,248 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:59:49,248 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:59:49,248 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:59:49,248 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:59:49,249 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:59:49,249 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:59:49,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:59:49,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:59:49,250 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:59:49,250 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:59:49,250 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:59:49,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:59:49,251 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:59:49,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:59:49,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:59:49,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:59:49,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:59:49,437 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:59:49,437 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:59:49,438 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-11-17 11:59:50,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:59:50,628 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:59:50,638 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-11-17 11:59:50,643 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb0b5ce4/0f1c874d00a64a318e86ad8ce6a1eb27/FLAG881c501ab [2023-11-17 11:59:50,652 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb0b5ce4/0f1c874d00a64a318e86ad8ce6a1eb27 [2023-11-17 11:59:50,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:59:50,655 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:59:50,655 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:59:50,655 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:59:50,658 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:59:50,659 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,659 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691f276f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50, skipping insertion in model container [2023-11-17 11:59:50,659 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,678 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:59:50,784 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-word-symm.wvr.c[2874,2887] [2023-11-17 11:59:50,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:59:50,795 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:59:50,813 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-word-symm.wvr.c[2874,2887] [2023-11-17 11:59:50,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:59:50,825 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:59:50,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50 WrapperNode [2023-11-17 11:59:50,825 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:59:50,826 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:59:50,826 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:59:50,826 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:59:50,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,850 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 135 [2023-11-17 11:59:50,850 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:59:50,851 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:59:50,851 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:59:50,851 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:59:50,857 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,866 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,866 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,874 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,878 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,879 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,880 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,881 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:59:50,882 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:59:50,882 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:59:50,882 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:59:50,883 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (1/1) ... [2023-11-17 11:59:50,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:59:50,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:50,910 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 11:59:50,918 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 11:59:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:59:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 11:59:50,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 11:59:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 11:59:50,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 11:59:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:59:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:59:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:59:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 11:59:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:59:50,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:59:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:59:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:59:50,933 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 11:59:51,027 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:59:51,028 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:59:51,300 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:59:51,515 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:59:51,515 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 11:59:51,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:59:51 BoogieIcfgContainer [2023-11-17 11:59:51,516 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:59:51,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:59:51,519 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:59:51,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:59:51,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:59:50" (1/3) ... [2023-11-17 11:59:51,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17428dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:59:51, skipping insertion in model container [2023-11-17 11:59:51,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:59:50" (2/3) ... [2023-11-17 11:59:51,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17428dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:59:51, skipping insertion in model container [2023-11-17 11:59:51,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:59:51" (3/3) ... [2023-11-17 11:59:51,523 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-11-17 11:59:51,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:59:51,535 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:59:51,536 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:59:51,574 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:59:51,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 84 flow [2023-11-17 11:59:51,635 INFO L124 PetriNetUnfolderBase]: 8/33 cut-off events. [2023-11-17 11:59:51,635 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:59:51,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 8/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 42 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-17 11:59:51,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 84 flow [2023-11-17 11:59:51,641 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 32 transitions, 76 flow [2023-11-17 11:59:51,649 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:59:51,666 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 31 places, 32 transitions, 76 flow [2023-11-17 11:59:51,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 31 places, 32 transitions, 76 flow [2023-11-17 11:59:51,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 32 transitions, 76 flow [2023-11-17 11:59:51,728 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2023-11-17 11:59:51,728 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:59:51,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 41 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-17 11:59:51,729 INFO L119 LiptonReduction]: Number of co-enabled transitions 270 [2023-11-17 11:59:52,714 INFO L134 LiptonReduction]: Checked pairs total: 360 [2023-11-17 11:59:52,715 INFO L136 LiptonReduction]: Total number of compositions: 17 [2023-11-17 11:59:52,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:59:52,737 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;@3ce25721, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:59:52,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:59:52,746 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:59:52,746 INFO L124 PetriNetUnfolderBase]: 7/22 cut-off events. [2023-11-17 11:59:52,746 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:59:52,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:52,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:52,747 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 11:59:52,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1437327940, now seen corresponding path program 1 times [2023-11-17 11:59:52,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:52,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728319944] [2023-11-17 11:59:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:52,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:53,244 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 11:59:53,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:53,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728319944] [2023-11-17 11:59:53,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728319944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:59:53,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:59:53,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:59:53,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907686328] [2023-11-17 11:59:53,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:59:53,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:59:53,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:53,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:59:53,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:59:53,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 11:59:53,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 23 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:53,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 11:59:53,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:53,413 INFO L124 PetriNetUnfolderBase]: 84/144 cut-off events. [2023-11-17 11:59:53,413 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 11:59:53,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 144 events. 84/144 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 358 event pairs, 33 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 238. Up to 113 conditions per place. [2023-11-17 11:59:53,415 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 31 selfloop transitions, 1 changer transitions 5/37 dead transitions. [2023-11-17 11:59:53,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 172 flow [2023-11-17 11:59:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:59:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:59:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2023-11-17 11:59:53,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24519230769230768 [2023-11-17 11:59:53,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 51 transitions. [2023-11-17 11:59:53,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 51 transitions. [2023-11-17 11:59:53,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:53,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 51 transitions. [2023-11-17 11:59:53,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 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 11:59:53,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 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 11:59:53,429 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 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 11:59:53,430 INFO L175 Difference]: Start difference. First operand has 23 places, 23 transitions, 58 flow. Second operand 4 states and 51 transitions. [2023-11-17 11:59:53,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 172 flow [2023-11-17 11:59:53,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 11:59:53,433 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 59 flow [2023-11-17 11:59:53,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2023-11-17 11:59:53,436 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 1 predicate places. [2023-11-17 11:59:53,436 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 59 flow [2023-11-17 11:59:53,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:53,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:53,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:59:53,437 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 11:59:53,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1318827162, now seen corresponding path program 2 times [2023-11-17 11:59:53,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:53,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111574212] [2023-11-17 11:59:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:53,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:53,545 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 11:59:53,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:53,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111574212] [2023-11-17 11:59:53,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111574212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:59:53,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:59:53,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:59:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868077134] [2023-11-17 11:59:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:59:53,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:59:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:59:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:59:53,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 11:59:53,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:53,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 11:59:53,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:53,659 INFO L124 PetriNetUnfolderBase]: 91/167 cut-off events. [2023-11-17 11:59:53,659 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-17 11:59:53,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 167 events. 91/167 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 479 event pairs, 43 based on Foata normal form. 5/128 useless extension candidates. Maximal degree in co-relation 364. Up to 131 conditions per place. [2023-11-17 11:59:53,661 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 29 selfloop transitions, 1 changer transitions 7/37 dead transitions. [2023-11-17 11:59:53,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 171 flow [2023-11-17 11:59:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:59:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:59:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2023-11-17 11:59:53,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24519230769230768 [2023-11-17 11:59:53,663 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 51 transitions. [2023-11-17 11:59:53,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 51 transitions. [2023-11-17 11:59:53,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:53,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 51 transitions. [2023-11-17 11:59:53,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 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 11:59:53,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 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 11:59:53,666 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 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 11:59:53,666 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 59 flow. Second operand 4 states and 51 transitions. [2023-11-17 11:59:53,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 171 flow [2023-11-17 11:59:53,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 37 transitions, 165 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 11:59:53,668 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 65 flow [2023-11-17 11:59:53,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=65, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-11-17 11:59:53,669 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 3 predicate places. [2023-11-17 11:59:53,669 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 65 flow [2023-11-17 11:59:53,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:53,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:59:53,670 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 11:59:53,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1474920693, now seen corresponding path program 1 times [2023-11-17 11:59:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:53,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930674215] [2023-11-17 11:59:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:53,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:53,708 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 11:59:53,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930674215] [2023-11-17 11:59:53,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930674215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:59:53,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:59:53,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:59:53,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866376408] [2023-11-17 11:59:53,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:59:53,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:59:53,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:53,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:59:53,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:59:53,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 11:59:53,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:53,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 11:59:53,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:53,762 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-17 11:59:53,762 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-17 11:59:53,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 116 events. 65/116 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 275 event pairs, 16 based on Foata normal form. 12/100 useless extension candidates. Maximal degree in co-relation 266. Up to 95 conditions per place. [2023-11-17 11:59:53,764 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 24 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-17 11:59:53,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 145 flow [2023-11-17 11:59:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:59:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:59:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2023-11-17 11:59:53,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26282051282051283 [2023-11-17 11:59:53,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 41 transitions. [2023-11-17 11:59:53,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 41 transitions. [2023-11-17 11:59:53,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:53,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 41 transitions. [2023-11-17 11:59:53,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,767 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 65 flow. Second operand 3 states and 41 transitions. [2023-11-17 11:59:53,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 145 flow [2023-11-17 11:59:53,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 30 transitions, 142 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 11:59:53,769 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 68 flow [2023-11-17 11:59:53,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-11-17 11:59:53,770 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 3 predicate places. [2023-11-17 11:59:53,770 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 68 flow [2023-11-17 11:59:53,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:53,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:53,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:53,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:59:53,771 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 11:59:53,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash -98136383, now seen corresponding path program 1 times [2023-11-17 11:59:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:53,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469859488] [2023-11-17 11:59:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:54,139 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 11:59:54,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:54,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469859488] [2023-11-17 11:59:54,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469859488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:59:54,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:59:54,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 11:59:54,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482484313] [2023-11-17 11:59:54,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:59:54,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 11:59:54,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 11:59:54,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-17 11:59:54,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 11:59:54,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 68 flow. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 11:59:54,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:54,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 11:59:54,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:54,352 INFO L124 PetriNetUnfolderBase]: 120/221 cut-off events. [2023-11-17 11:59:54,352 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-11-17 11:59:54,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 221 events. 120/221 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 685 event pairs, 22 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 203. Up to 57 conditions per place. [2023-11-17 11:59:54,355 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 53 selfloop transitions, 17 changer transitions 7/77 dead transitions. [2023-11-17 11:59:54,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 77 transitions, 374 flow [2023-11-17 11:59:54,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:59:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:59:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2023-11-17 11:59:54,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20576923076923076 [2023-11-17 11:59:54,357 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 107 transitions. [2023-11-17 11:59:54,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 107 transitions. [2023-11-17 11:59:54,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:54,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 107 transitions. [2023-11-17 11:59:54,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 10.7) internal successors, (107), 10 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 11:59:54,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:54,359 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:54,359 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 68 flow. Second operand 10 states and 107 transitions. [2023-11-17 11:59:54,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 77 transitions, 374 flow [2023-11-17 11:59:54,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 77 transitions, 350 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-17 11:59:54,361 INFO L231 Difference]: Finished difference. Result has 38 places, 40 transitions, 200 flow [2023-11-17 11:59:54,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=200, PETRI_PLACES=38, PETRI_TRANSITIONS=40} [2023-11-17 11:59:54,362 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 15 predicate places. [2023-11-17 11:59:54,363 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 40 transitions, 200 flow [2023-11-17 11:59:54,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 11:59:54,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:54,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:54,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:59:54,364 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 11:59:54,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:54,364 INFO L85 PathProgramCache]: Analyzing trace with hash 611588400, now seen corresponding path program 1 times [2023-11-17 11:59:54,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:54,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693022901] [2023-11-17 11:59:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:54,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:59:54,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:54,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693022901] [2023-11-17 11:59:54,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693022901] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:54,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243468232] [2023-11-17 11:59:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:54,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:54,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:54,626 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 11:59:54,653 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 11:59:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:54,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 11:59:54,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:59:54,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:55,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:59:55,101 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 124 treesize of output 88 [2023-11-17 11:59:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:59:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243468232] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:59:55,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:59:55,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-17 11:59:55,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749809572] [2023-11-17 11:59:55,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:59:55,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:59:55,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:59:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:59:55,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 11:59:55,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 200 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 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 11:59:55,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:55,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 11:59:55,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:57,087 INFO L124 PetriNetUnfolderBase]: 334/604 cut-off events. [2023-11-17 11:59:57,087 INFO L125 PetriNetUnfolderBase]: For 513/513 co-relation queries the response was YES. [2023-11-17 11:59:57,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 604 events. 334/604 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2619 event pairs, 41 based on Foata normal form. 22/575 useless extension candidates. Maximal degree in co-relation 1472. Up to 123 conditions per place. [2023-11-17 11:59:57,090 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 137 selfloop transitions, 54 changer transitions 39/230 dead transitions. [2023-11-17 11:59:57,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 230 transitions, 1349 flow [2023-11-17 11:59:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 11:59:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 11:59:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 325 transitions. [2023-11-17 11:59:57,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1953125 [2023-11-17 11:59:57,095 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 325 transitions. [2023-11-17 11:59:57,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 325 transitions. [2023-11-17 11:59:57,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:57,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 325 transitions. [2023-11-17 11:59:57,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 10.15625) internal successors, (325), 32 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:57,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 52.0) internal successors, (1716), 33 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:57,100 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 52.0) internal successors, (1716), 33 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:57,100 INFO L175 Difference]: Start difference. First operand has 38 places, 40 transitions, 200 flow. Second operand 32 states and 325 transitions. [2023-11-17 11:59:57,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 230 transitions, 1349 flow [2023-11-17 11:59:57,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 230 transitions, 1339 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-17 11:59:57,108 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 603 flow [2023-11-17 11:59:57,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=603, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2023-11-17 11:59:57,111 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 62 predicate places. [2023-11-17 11:59:57,111 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 603 flow [2023-11-17 11:59:57,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 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 11:59:57,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:57,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:57,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:59:57,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:57,318 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 11:59:57,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash -452014904, now seen corresponding path program 2 times [2023-11-17 11:59:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:57,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985219587] [2023-11-17 11:59:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:57,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:59:57,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:57,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985219587] [2023-11-17 11:59:57,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985219587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:57,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382403190] [2023-11-17 11:59:57,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:59:57,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:57,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:57,549 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 11:59:57,573 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 11:59:57,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 11:59:57,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:59:57,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 11:59:57,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:59:57,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:59:57,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382403190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:59:57,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:59:57,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-17 11:59:57,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859860755] [2023-11-17 11:59:57,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:59:57,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 11:59:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 11:59:57,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:59:57,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 11:59:57,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 603 flow. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:57,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:57,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 11:59:57,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:57,943 INFO L124 PetriNetUnfolderBase]: 306/540 cut-off events. [2023-11-17 11:59:57,944 INFO L125 PetriNetUnfolderBase]: For 2341/2341 co-relation queries the response was YES. [2023-11-17 11:59:57,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 540 events. 306/540 cut-off events. For 2341/2341 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2141 event pairs, 43 based on Foata normal form. 1/493 useless extension candidates. Maximal degree in co-relation 2347. Up to 256 conditions per place. [2023-11-17 11:59:57,947 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 60 selfloop transitions, 41 changer transitions 11/112 dead transitions. [2023-11-17 11:59:57,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 112 transitions, 995 flow [2023-11-17 11:59:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:59:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:59:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2023-11-17 11:59:57,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20512820512820512 [2023-11-17 11:59:57,949 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 96 transitions. [2023-11-17 11:59:57,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 96 transitions. [2023-11-17 11:59:57,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:57,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 96 transitions. [2023-11-17 11:59:57,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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 11:59:57,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:57,950 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:57,950 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 603 flow. Second operand 9 states and 96 transitions. [2023-11-17 11:59:57,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 112 transitions, 995 flow [2023-11-17 11:59:57,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 884 flow, removed 39 selfloop flow, removed 9 redundant places. [2023-11-17 11:59:57,958 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 593 flow [2023-11-17 11:59:57,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=593, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2023-11-17 11:59:57,960 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 57 predicate places. [2023-11-17 11:59:57,960 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 593 flow [2023-11-17 11:59:57,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:57,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:57,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:57,969 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 11:59:58,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 11:59:58,168 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 11:59:58,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:58,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1377151322, now seen corresponding path program 3 times [2023-11-17 11:59:58,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:58,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456205400] [2023-11-17 11:59:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:58,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:59:58,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:58,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456205400] [2023-11-17 11:59:58,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456205400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:58,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527495920] [2023-11-17 11:59:58,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:59:58,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:58,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:58,379 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 11:59:58,403 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 11:59:58,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 11:59:58,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:59:58,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 11:59:58,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:59:58,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:59:58,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527495920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:59:58,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:59:58,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-17 11:59:58,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529368330] [2023-11-17 11:59:58,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:59:58,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 11:59:58,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:58,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 11:59:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:59:58,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 11:59:58,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 593 flow. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:58,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:58,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 11:59:58,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:58,737 INFO L124 PetriNetUnfolderBase]: 310/553 cut-off events. [2023-11-17 11:59:58,737 INFO L125 PetriNetUnfolderBase]: For 1782/1782 co-relation queries the response was YES. [2023-11-17 11:59:58,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2386 conditions, 553 events. 310/553 cut-off events. For 1782/1782 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2240 event pairs, 39 based on Foata normal form. 1/504 useless extension candidates. Maximal degree in co-relation 2341. Up to 272 conditions per place. [2023-11-17 11:59:58,740 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 60 selfloop transitions, 45 changer transitions 5/110 dead transitions. [2023-11-17 11:59:58,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 959 flow [2023-11-17 11:59:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:59:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:59:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2023-11-17 11:59:58,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20085470085470086 [2023-11-17 11:59:58,741 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 94 transitions. [2023-11-17 11:59:58,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 94 transitions. [2023-11-17 11:59:58,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:58,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 94 transitions. [2023-11-17 11:59:58,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 11:59:58,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:58,742 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:58,742 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 593 flow. Second operand 9 states and 94 transitions. [2023-11-17 11:59:58,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 959 flow [2023-11-17 11:59:58,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 110 transitions, 864 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-17 11:59:58,748 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 622 flow [2023-11-17 11:59:58,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=622, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2023-11-17 11:59:58,749 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 57 predicate places. [2023-11-17 11:59:58,749 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 622 flow [2023-11-17 11:59:58,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:58,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:58,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:58,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 11:59:58,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:58,956 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 11:59:58,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:58,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1352546352, now seen corresponding path program 4 times [2023-11-17 11:59:58,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:58,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800037881] [2023-11-17 11:59:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:58,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:59:59,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:59,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800037881] [2023-11-17 11:59:59,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800037881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:59,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482720392] [2023-11-17 11:59:59,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:59:59,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:59,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:59,204 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 11:59:59,208 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 11:59:59,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:59:59,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:59:59,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 11:59:59,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:59,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:59:59,489 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 120 treesize of output 85 [2023-11-17 11:59:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:59:59,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:59,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:59:59,579 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 124 treesize of output 88 [2023-11-17 11:59:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:59:59,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482720392] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:59,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 11:59:59,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2023-11-17 11:59:59,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270129492] [2023-11-17 11:59:59,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:59:59,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 11:59:59,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:59,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 11:59:59,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:59:59,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 11:59:59,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 622 flow. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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 11:59:59,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:59,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 11:59:59,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:00,363 INFO L124 PetriNetUnfolderBase]: 283/521 cut-off events. [2023-11-17 12:00:00,364 INFO L125 PetriNetUnfolderBase]: For 1587/1587 co-relation queries the response was YES. [2023-11-17 12:00:00,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2190 conditions, 521 events. 283/521 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2161 event pairs, 49 based on Foata normal form. 25/496 useless extension candidates. Maximal degree in co-relation 2145. Up to 134 conditions per place. [2023-11-17 12:00:00,366 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 69 selfloop transitions, 45 changer transitions 11/125 dead transitions. [2023-11-17 12:00:00,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 125 transitions, 1071 flow [2023-11-17 12:00:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:00:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:00:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2023-11-17 12:00:00,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2062937062937063 [2023-11-17 12:00:00,368 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 118 transitions. [2023-11-17 12:00:00,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 118 transitions. [2023-11-17 12:00:00,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:00,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 118 transitions. [2023-11-17 12:00:00,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.727272727272727) internal successors, (118), 11 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:00,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 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 12:00:00,369 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 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 12:00:00,369 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 622 flow. Second operand 11 states and 118 transitions. [2023-11-17 12:00:00,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 125 transitions, 1071 flow [2023-11-17 12:00:00,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 125 transitions, 964 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-17 12:00:00,377 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 709 flow [2023-11-17 12:00:00,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=709, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2023-11-17 12:00:00,378 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 65 predicate places. [2023-11-17 12:00:00,378 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 709 flow [2023-11-17 12:00:00,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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 12:00:00,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:00,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:00,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:00,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:00,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:00,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:00,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1176360639, now seen corresponding path program 1 times [2023-11-17 12:00:00,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:00,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840095125] [2023-11-17 12:00:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:00,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:00,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:00,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840095125] [2023-11-17 12:00:00,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840095125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:00,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855313435] [2023-11-17 12:00:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:00,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:00,792 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:00,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:00:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:00,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 12:00:00,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:01,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:01,084 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 118 treesize of output 83 [2023-11-17 12:00:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:01,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:01,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:01,175 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 124 treesize of output 88 [2023-11-17 12:00:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:01,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855313435] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:01,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:00:01,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 21 [2023-11-17 12:00:01,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319017183] [2023-11-17 12:00:01,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:01,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:00:01,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:01,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:00:01,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:00:01,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:01,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 709 flow. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:01,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:01,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:01,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:02,124 INFO L124 PetriNetUnfolderBase]: 436/809 cut-off events. [2023-11-17 12:00:02,125 INFO L125 PetriNetUnfolderBase]: For 4829/4829 co-relation queries the response was YES. [2023-11-17 12:00:02,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3701 conditions, 809 events. 436/809 cut-off events. For 4829/4829 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3800 event pairs, 75 based on Foata normal form. 26/764 useless extension candidates. Maximal degree in co-relation 3459. Up to 196 conditions per place. [2023-11-17 12:00:02,129 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 101 selfloop transitions, 52 changer transitions 9/162 dead transitions. [2023-11-17 12:00:02,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 162 transitions, 1530 flow [2023-11-17 12:00:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:00:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:00:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2023-11-17 12:00:02,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23251748251748253 [2023-11-17 12:00:02,131 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 133 transitions. [2023-11-17 12:00:02,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 133 transitions. [2023-11-17 12:00:02,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:02,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 133 transitions. [2023-11-17 12:00:02,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 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 12:00:02,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 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 12:00:02,132 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 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 12:00:02,132 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 709 flow. Second operand 11 states and 133 transitions. [2023-11-17 12:00:02,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 162 transitions, 1530 flow [2023-11-17 12:00:02,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 162 transitions, 1403 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-11-17 12:00:02,146 INFO L231 Difference]: Finished difference. Result has 96 places, 100 transitions, 996 flow [2023-11-17 12:00:02,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=996, PETRI_PLACES=96, PETRI_TRANSITIONS=100} [2023-11-17 12:00:02,147 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 73 predicate places. [2023-11-17 12:00:02,147 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 100 transitions, 996 flow [2023-11-17 12:00:02,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:02,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:02,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:02,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:02,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:02,354 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:02,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:02,354 INFO L85 PathProgramCache]: Analyzing trace with hash -411109962, now seen corresponding path program 5 times [2023-11-17 12:00:02,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:02,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537571218] [2023-11-17 12:00:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:02,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:02,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:02,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537571218] [2023-11-17 12:00:02,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537571218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148676929] [2023-11-17 12:00:02,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:00:02,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:02,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:02,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:02,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:00:02,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:00:02,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:02,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:00:02,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:02,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:03,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:03,033 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 124 treesize of output 88 [2023-11-17 12:00:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148676929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:03,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:03,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-17 12:00:03,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630396833] [2023-11-17 12:00:03,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:03,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:00:03,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:00:03,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:00:03,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:03,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 100 transitions, 996 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:03,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:03,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:03,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:04,786 INFO L124 PetriNetUnfolderBase]: 443/825 cut-off events. [2023-11-17 12:00:04,786 INFO L125 PetriNetUnfolderBase]: For 5009/5009 co-relation queries the response was YES. [2023-11-17 12:00:04,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4070 conditions, 825 events. 443/825 cut-off events. For 5009/5009 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3930 event pairs, 90 based on Foata normal form. 2/750 useless extension candidates. Maximal degree in co-relation 3741. Up to 165 conditions per place. [2023-11-17 12:00:04,792 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 149 selfloop transitions, 67 changer transitions 16/232 dead transitions. [2023-11-17 12:00:04,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 232 transitions, 2109 flow [2023-11-17 12:00:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:00:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:00:04,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 289 transitions. [2023-11-17 12:00:04,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1792803970223325 [2023-11-17 12:00:04,794 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 289 transitions. [2023-11-17 12:00:04,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 289 transitions. [2023-11-17 12:00:04,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:04,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 289 transitions. [2023-11-17 12:00:04,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 9.32258064516129) internal successors, (289), 31 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:04,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 52.0) internal successors, (1664), 32 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:04,797 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 52.0) internal successors, (1664), 32 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:04,797 INFO L175 Difference]: Start difference. First operand has 96 places, 100 transitions, 996 flow. Second operand 31 states and 289 transitions. [2023-11-17 12:00:04,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 232 transitions, 2109 flow [2023-11-17 12:00:04,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 232 transitions, 1995 flow, removed 46 selfloop flow, removed 3 redundant places. [2023-11-17 12:00:04,817 INFO L231 Difference]: Finished difference. Result has 127 places, 105 transitions, 1136 flow [2023-11-17 12:00:04,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1136, PETRI_PLACES=127, PETRI_TRANSITIONS=105} [2023-11-17 12:00:04,818 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 104 predicate places. [2023-11-17 12:00:04,818 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 105 transitions, 1136 flow [2023-11-17 12:00:04,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:04,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:04,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:04,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:05,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:05,024 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:05,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2086295160, now seen corresponding path program 6 times [2023-11-17 12:00:05,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:05,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500943701] [2023-11-17 12:00:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:05,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500943701] [2023-11-17 12:00:05,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500943701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956904661] [2023-11-17 12:00:05,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:00:05,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:05,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:05,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:05,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:00:05,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 12:00:05,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:05,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:00:05,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:05,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:05,409 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 116 treesize of output 81 [2023-11-17 12:00:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:00:05,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:00:05,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956904661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:05,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:00:05,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-17 12:00:05,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266038833] [2023-11-17 12:00:05,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:05,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:00:05,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:00:05,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:00:05,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:05,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 105 transitions, 1136 flow. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:05,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:05,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:05,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:05,704 INFO L124 PetriNetUnfolderBase]: 440/806 cut-off events. [2023-11-17 12:00:05,704 INFO L125 PetriNetUnfolderBase]: For 4771/4771 co-relation queries the response was YES. [2023-11-17 12:00:05,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 806 events. 440/806 cut-off events. For 4771/4771 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3712 event pairs, 92 based on Foata normal form. 1/731 useless extension candidates. Maximal degree in co-relation 3927. Up to 381 conditions per place. [2023-11-17 12:00:05,709 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 67 selfloop transitions, 61 changer transitions 5/133 dead transitions. [2023-11-17 12:00:05,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 133 transitions, 1521 flow [2023-11-17 12:00:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2023-11-17 12:00:05,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19444444444444445 [2023-11-17 12:00:05,711 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 91 transitions. [2023-11-17 12:00:05,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 91 transitions. [2023-11-17 12:00:05,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:05,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 91 transitions. [2023-11-17 12:00:05,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:05,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:05,716 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:05,716 INFO L175 Difference]: Start difference. First operand has 127 places, 105 transitions, 1136 flow. Second operand 9 states and 91 transitions. [2023-11-17 12:00:05,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 133 transitions, 1521 flow [2023-11-17 12:00:05,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 133 transitions, 1370 flow, removed 7 selfloop flow, removed 20 redundant places. [2023-11-17 12:00:05,736 INFO L231 Difference]: Finished difference. Result has 114 places, 105 transitions, 1115 flow [2023-11-17 12:00:05,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1115, PETRI_PLACES=114, PETRI_TRANSITIONS=105} [2023-11-17 12:00:05,736 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 91 predicate places. [2023-11-17 12:00:05,736 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 105 transitions, 1115 flow [2023-11-17 12:00:05,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:05,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:05,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:05,742 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 12:00:05,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:05,945 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:05,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:05,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1620451804, now seen corresponding path program 1 times [2023-11-17 12:00:05,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:05,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204556479] [2023-11-17 12:00:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:05,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:05,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:05,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204556479] [2023-11-17 12:00:05,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204556479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:05,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:00:05,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:00:05,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712613776] [2023-11-17 12:00:05,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:05,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:00:05,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:05,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:00:05,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:00:05,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:05,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 105 transitions, 1115 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:05,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:05,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:05,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:06,105 INFO L124 PetriNetUnfolderBase]: 305/579 cut-off events. [2023-11-17 12:00:06,106 INFO L125 PetriNetUnfolderBase]: For 3553/3553 co-relation queries the response was YES. [2023-11-17 12:00:06,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2967 conditions, 579 events. 305/579 cut-off events. For 3553/3553 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2484 event pairs, 130 based on Foata normal form. 34/570 useless extension candidates. Maximal degree in co-relation 2910. Up to 392 conditions per place. [2023-11-17 12:00:06,110 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 94 selfloop transitions, 9 changer transitions 9/112 dead transitions. [2023-11-17 12:00:06,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 112 transitions, 1281 flow [2023-11-17 12:00:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:00:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:00:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2023-11-17 12:00:06,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23461538461538461 [2023-11-17 12:00:06,110 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 61 transitions. [2023-11-17 12:00:06,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 61 transitions. [2023-11-17 12:00:06,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:06,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 61 transitions. [2023-11-17 12:00:06,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:06,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 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 12:00:06,111 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 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 12:00:06,111 INFO L175 Difference]: Start difference. First operand has 114 places, 105 transitions, 1115 flow. Second operand 5 states and 61 transitions. [2023-11-17 12:00:06,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 112 transitions, 1281 flow [2023-11-17 12:00:06,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 112 transitions, 1178 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-17 12:00:06,124 INFO L231 Difference]: Finished difference. Result has 111 places, 84 transitions, 760 flow [2023-11-17 12:00:06,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=760, PETRI_PLACES=111, PETRI_TRANSITIONS=84} [2023-11-17 12:00:06,125 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 88 predicate places. [2023-11-17 12:00:06,125 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 84 transitions, 760 flow [2023-11-17 12:00:06,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:06,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:06,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:06,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 12:00:06,126 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:06,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1444793077, now seen corresponding path program 2 times [2023-11-17 12:00:06,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:06,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236314428] [2023-11-17 12:00:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:06,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:06,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236314428] [2023-11-17 12:00:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236314428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121432408] [2023-11-17 12:00:06,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:00:06,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:06,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:06,307 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:06,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 12:00:06,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 12:00:06,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:06,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 12:00:06,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:00:06,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:00:06,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121432408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:06,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:00:06,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-11-17 12:00:06,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341551924] [2023-11-17 12:00:06,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:06,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:00:06,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:06,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:00:06,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:00:06,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:06,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 84 transitions, 760 flow. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:06,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:06,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:06,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:06,718 INFO L124 PetriNetUnfolderBase]: 293/554 cut-off events. [2023-11-17 12:00:06,718 INFO L125 PetriNetUnfolderBase]: For 3114/3114 co-relation queries the response was YES. [2023-11-17 12:00:06,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2784 conditions, 554 events. 293/554 cut-off events. For 3114/3114 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2370 event pairs, 58 based on Foata normal form. 2/513 useless extension candidates. Maximal degree in co-relation 2635. Up to 247 conditions per place. [2023-11-17 12:00:06,722 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 76 selfloop transitions, 33 changer transitions 10/119 dead transitions. [2023-11-17 12:00:06,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 119 transitions, 1186 flow [2023-11-17 12:00:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2023-11-17 12:00:06,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.202991452991453 [2023-11-17 12:00:06,723 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 95 transitions. [2023-11-17 12:00:06,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 95 transitions. [2023-11-17 12:00:06,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:06,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 95 transitions. [2023-11-17 12:00:06,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:06,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:06,724 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:06,724 INFO L175 Difference]: Start difference. First operand has 111 places, 84 transitions, 760 flow. Second operand 9 states and 95 transitions. [2023-11-17 12:00:06,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 119 transitions, 1186 flow [2023-11-17 12:00:06,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 1101 flow, removed 32 selfloop flow, removed 9 redundant places. [2023-11-17 12:00:06,735 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 775 flow [2023-11-17 12:00:06,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=775, PETRI_PLACES=100, PETRI_TRANSITIONS=83} [2023-11-17 12:00:06,736 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 77 predicate places. [2023-11-17 12:00:06,736 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 775 flow [2023-11-17 12:00:06,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:06,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:06,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:06,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:06,941 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 12:00:06,942 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:06,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash -148648619, now seen corresponding path program 3 times [2023-11-17 12:00:06,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:06,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427177879] [2023-11-17 12:00:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:06,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:07,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427177879] [2023-11-17 12:00:07,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427177879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707663203] [2023-11-17 12:00:07,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:00:07,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:07,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:07,125 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:07,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 12:00:07,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 12:00:07,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:07,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 12:00:07,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:00:07,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:00:07,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707663203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:07,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:00:07,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-11-17 12:00:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578698169] [2023-11-17 12:00:07,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:07,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:00:07,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:00:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:00:07,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:07,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 83 transitions, 775 flow. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:07,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:07,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:07,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:07,550 INFO L124 PetriNetUnfolderBase]: 281/538 cut-off events. [2023-11-17 12:00:07,550 INFO L125 PetriNetUnfolderBase]: For 2686/2686 co-relation queries the response was YES. [2023-11-17 12:00:07,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2739 conditions, 538 events. 281/538 cut-off events. For 2686/2686 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2317 event pairs, 62 based on Foata normal form. 2/497 useless extension candidates. Maximal degree in co-relation 2639. Up to 279 conditions per place. [2023-11-17 12:00:07,555 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 70 selfloop transitions, 29 changer transitions 12/111 dead transitions. [2023-11-17 12:00:07,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 111 transitions, 1142 flow [2023-11-17 12:00:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2023-11-17 12:00:07,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1858974358974359 [2023-11-17 12:00:07,556 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 87 transitions. [2023-11-17 12:00:07,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 87 transitions. [2023-11-17 12:00:07,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:07,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 87 transitions. [2023-11-17 12:00:07,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:07,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:07,557 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:07,557 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 775 flow. Second operand 9 states and 87 transitions. [2023-11-17 12:00:07,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 111 transitions, 1142 flow [2023-11-17 12:00:07,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 111 transitions, 1038 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-11-17 12:00:07,566 INFO L231 Difference]: Finished difference. Result has 99 places, 79 transitions, 721 flow [2023-11-17 12:00:07,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=721, PETRI_PLACES=99, PETRI_TRANSITIONS=79} [2023-11-17 12:00:07,566 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 76 predicate places. [2023-11-17 12:00:07,566 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 79 transitions, 721 flow [2023-11-17 12:00:07,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:07,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:07,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:07,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:07,771 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 12:00:07,772 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:07,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2063819563, now seen corresponding path program 4 times [2023-11-17 12:00:07,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:07,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61678506] [2023-11-17 12:00:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:07,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:07,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:07,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61678506] [2023-11-17 12:00:07,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61678506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:07,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985650429] [2023-11-17 12:00:07,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:00:07,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:07,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:07,957 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:07,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 12:00:08,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:00:08,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:08,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 12:00:08,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:08,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:08,281 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 120 treesize of output 85 [2023-11-17 12:00:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:08,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:08,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:08,381 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 124 treesize of output 88 [2023-11-17 12:00:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:08,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985650429] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:08,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:00:08,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 21 [2023-11-17 12:00:08,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942103053] [2023-11-17 12:00:08,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:08,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:00:08,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:08,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:00:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:00:08,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:08,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 79 transitions, 721 flow. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:08,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:08,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:08,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:09,118 INFO L124 PetriNetUnfolderBase]: 245/474 cut-off events. [2023-11-17 12:00:09,118 INFO L125 PetriNetUnfolderBase]: For 2156/2156 co-relation queries the response was YES. [2023-11-17 12:00:09,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2298 conditions, 474 events. 245/474 cut-off events. For 2156/2156 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1963 event pairs, 58 based on Foata normal form. 18/449 useless extension candidates. Maximal degree in co-relation 2223. Up to 205 conditions per place. [2023-11-17 12:00:09,122 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 73 selfloop transitions, 27 changer transitions 9/109 dead transitions. [2023-11-17 12:00:09,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 109 transitions, 1060 flow [2023-11-17 12:00:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2023-11-17 12:00:09,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19658119658119658 [2023-11-17 12:00:09,130 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 92 transitions. [2023-11-17 12:00:09,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 92 transitions. [2023-11-17 12:00:09,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:09,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 92 transitions. [2023-11-17 12:00:09,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 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 12:00:09,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:09,131 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:09,131 INFO L175 Difference]: Start difference. First operand has 99 places, 79 transitions, 721 flow. Second operand 9 states and 92 transitions. [2023-11-17 12:00:09,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 109 transitions, 1060 flow [2023-11-17 12:00:09,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 109 transitions, 956 flow, removed 11 selfloop flow, removed 10 redundant places. [2023-11-17 12:00:09,138 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 673 flow [2023-11-17 12:00:09,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=673, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2023-11-17 12:00:09,139 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 75 predicate places. [2023-11-17 12:00:09,139 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 673 flow [2023-11-17 12:00:09,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:09,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:09,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:09,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:09,344 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 12:00:09,345 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:09,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash 682872195, now seen corresponding path program 5 times [2023-11-17 12:00:09,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:09,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314297826] [2023-11-17 12:00:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:09,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:09,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:09,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314297826] [2023-11-17 12:00:09,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314297826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:09,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810262044] [2023-11-17 12:00:09,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:00:09,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:09,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:09,533 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:09,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 12:00:09,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:00:09,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:09,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:00:09,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:09,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:09,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:09,945 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 124 treesize of output 88 [2023-11-17 12:00:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:10,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810262044] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:10,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:00:10,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 21 [2023-11-17 12:00:10,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559816698] [2023-11-17 12:00:10,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:10,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:00:10,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:00:10,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:00:10,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:10,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 673 flow. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:10,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:10,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:10,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:10,456 INFO L124 PetriNetUnfolderBase]: 237/462 cut-off events. [2023-11-17 12:00:10,457 INFO L125 PetriNetUnfolderBase]: For 1973/1973 co-relation queries the response was YES. [2023-11-17 12:00:10,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2177 conditions, 462 events. 237/462 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1907 event pairs, 56 based on Foata normal form. 2/421 useless extension candidates. Maximal degree in co-relation 2082. Up to 205 conditions per place. [2023-11-17 12:00:10,460 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 72 selfloop transitions, 24 changer transitions 9/105 dead transitions. [2023-11-17 12:00:10,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 105 transitions, 998 flow [2023-11-17 12:00:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2023-11-17 12:00:10,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.18162393162393162 [2023-11-17 12:00:10,461 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 85 transitions. [2023-11-17 12:00:10,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 85 transitions. [2023-11-17 12:00:10,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:10,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 85 transitions. [2023-11-17 12:00:10,463 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 12:00:10,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:10,465 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:10,465 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 673 flow. Second operand 9 states and 85 transitions. [2023-11-17 12:00:10,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 105 transitions, 998 flow [2023-11-17 12:00:10,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 105 transitions, 931 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-11-17 12:00:10,471 INFO L231 Difference]: Finished difference. Result has 98 places, 74 transitions, 629 flow [2023-11-17 12:00:10,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=629, PETRI_PLACES=98, PETRI_TRANSITIONS=74} [2023-11-17 12:00:10,472 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 75 predicate places. [2023-11-17 12:00:10,472 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 74 transitions, 629 flow [2023-11-17 12:00:10,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:10,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:10,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:10,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:10,676 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 12:00:10,676 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:10,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1543530663, now seen corresponding path program 6 times [2023-11-17 12:00:10,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:10,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951586975] [2023-11-17 12:00:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:10,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:10,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:10,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951586975] [2023-11-17 12:00:10,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951586975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:10,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980662423] [2023-11-17 12:00:10,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:00:10,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:10,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:10,853 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:10,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 12:00:10,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 12:00:10,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:10,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 12:00:10,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:00:11,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:00:11,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980662423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:11,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:00:11,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-11-17 12:00:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170558289] [2023-11-17 12:00:11,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:11,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:00:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:00:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:00:11,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:11,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 74 transitions, 629 flow. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:11,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:11,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:11,241 INFO L124 PetriNetUnfolderBase]: 231/436 cut-off events. [2023-11-17 12:00:11,242 INFO L125 PetriNetUnfolderBase]: For 1789/1789 co-relation queries the response was YES. [2023-11-17 12:00:11,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 436 events. 231/436 cut-off events. For 1789/1789 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1683 event pairs, 56 based on Foata normal form. 2/395 useless extension candidates. Maximal degree in co-relation 1997. Up to 205 conditions per place. [2023-11-17 12:00:11,244 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 55 selfloop transitions, 20 changer transitions 21/96 dead transitions. [2023-11-17 12:00:11,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 96 transitions, 914 flow [2023-11-17 12:00:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 79 transitions. [2023-11-17 12:00:11,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16880341880341881 [2023-11-17 12:00:11,245 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 79 transitions. [2023-11-17 12:00:11,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 79 transitions. [2023-11-17 12:00:11,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:11,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 79 transitions. [2023-11-17 12:00:11,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,246 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,246 INFO L175 Difference]: Start difference. First operand has 98 places, 74 transitions, 629 flow. Second operand 9 states and 79 transitions. [2023-11-17 12:00:11,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 96 transitions, 914 flow [2023-11-17 12:00:11,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 96 transitions, 860 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-17 12:00:11,251 INFO L231 Difference]: Finished difference. Result has 96 places, 67 transitions, 579 flow [2023-11-17 12:00:11,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=579, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2023-11-17 12:00:11,252 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 73 predicate places. [2023-11-17 12:00:11,252 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 579 flow [2023-11-17 12:00:11,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:11,252 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 12:00:11,257 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 12:00:11,457 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 12:00:11,457 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:11,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1236930449, now seen corresponding path program 1 times [2023-11-17 12:00:11,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:11,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026002076] [2023-11-17 12:00:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:11,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:00:11,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:11,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026002076] [2023-11-17 12:00:11,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026002076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:11,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:00:11,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:00:11,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369221135] [2023-11-17 12:00:11,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:11,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:00:11,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:11,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:00:11,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:00:11,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:11,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 579 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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 12:00:11,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:11,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:11,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:11,580 INFO L124 PetriNetUnfolderBase]: 143/273 cut-off events. [2023-11-17 12:00:11,580 INFO L125 PetriNetUnfolderBase]: For 1228/1228 co-relation queries the response was YES. [2023-11-17 12:00:11,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 273 events. 143/273 cut-off events. For 1228/1228 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 880 event pairs, 57 based on Foata normal form. 24/279 useless extension candidates. Maximal degree in co-relation 1311. Up to 211 conditions per place. [2023-11-17 12:00:11,582 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 34 selfloop transitions, 4 changer transitions 24/62 dead transitions. [2023-11-17 12:00:11,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 62 transitions, 581 flow [2023-11-17 12:00:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:00:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:00:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2023-11-17 12:00:11,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2 [2023-11-17 12:00:11,582 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 52 transitions. [2023-11-17 12:00:11,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 52 transitions. [2023-11-17 12:00:11,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:11,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 52 transitions. [2023-11-17 12:00:11,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 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 12:00:11,583 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 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 12:00:11,583 INFO L175 Difference]: Start difference. First operand has 96 places, 67 transitions, 579 flow. Second operand 5 states and 52 transitions. [2023-11-17 12:00:11,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 62 transitions, 581 flow [2023-11-17 12:00:11,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 62 transitions, 483 flow, removed 13 selfloop flow, removed 14 redundant places. [2023-11-17 12:00:11,586 INFO L231 Difference]: Finished difference. Result has 73 places, 38 transitions, 198 flow [2023-11-17 12:00:11,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=73, PETRI_TRANSITIONS=38} [2023-11-17 12:00:11,587 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 50 predicate places. [2023-11-17 12:00:11,587 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 38 transitions, 198 flow [2023-11-17 12:00:11,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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 12:00:11,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:11,587 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 12:00:11,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 12:00:11,587 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:11,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2041868658, now seen corresponding path program 1 times [2023-11-17 12:00:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:11,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866710815] [2023-11-17 12:00:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:11,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:11,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:11,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866710815] [2023-11-17 12:00:11,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866710815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:11,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965677734] [2023-11-17 12:00:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:11,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:11,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:11,690 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:11,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 12:00:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:11,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:00:11,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:11,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:11,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965677734] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:11,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:00:11,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-11-17 12:00:11,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477769747] [2023-11-17 12:00:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:00:11,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:00:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:00:11,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:11,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 38 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:11,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:11,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:11,937 INFO L124 PetriNetUnfolderBase]: 160/266 cut-off events. [2023-11-17 12:00:11,937 INFO L125 PetriNetUnfolderBase]: For 506/506 co-relation queries the response was YES. [2023-11-17 12:00:11,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 266 events. 160/266 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 752 event pairs, 36 based on Foata normal form. 16/248 useless extension candidates. Maximal degree in co-relation 1006. Up to 168 conditions per place. [2023-11-17 12:00:11,939 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 34 selfloop transitions, 13 changer transitions 0/47 dead transitions. [2023-11-17 12:00:11,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 337 flow [2023-11-17 12:00:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:00:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:00:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 53 transitions. [2023-11-17 12:00:11,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14560439560439561 [2023-11-17 12:00:11,940 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 53 transitions. [2023-11-17 12:00:11,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 53 transitions. [2023-11-17 12:00:11,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:11,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 53 transitions. [2023-11-17 12:00:11,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,941 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,941 INFO L175 Difference]: Start difference. First operand has 73 places, 38 transitions, 198 flow. Second operand 7 states and 53 transitions. [2023-11-17 12:00:11,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 337 flow [2023-11-17 12:00:11,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 285 flow, removed 22 selfloop flow, removed 15 redundant places. [2023-11-17 12:00:11,942 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 214 flow [2023-11-17 12:00:11,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-17 12:00:11,943 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 23 predicate places. [2023-11-17 12:00:11,943 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 214 flow [2023-11-17 12:00:11,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:11,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:11,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:11,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:12,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:12,148 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:12,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:12,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1997386447, now seen corresponding path program 1 times [2023-11-17 12:00:12,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:12,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882568323] [2023-11-17 12:00:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:12,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:12,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:12,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882568323] [2023-11-17 12:00:12,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882568323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:12,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798060414] [2023-11-17 12:00:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:12,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:12,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:12,904 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:12,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 12:00:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:12,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 12:00:12,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:13,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:00:13,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:00:13,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:00:13,363 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:00:13,363 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 83 treesize of output 47 [2023-11-17 12:00:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:13,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:18,021 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:00:18,021 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 109 treesize of output 100 [2023-11-17 12:00:18,046 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:00:18,046 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 109 treesize of output 100 [2023-11-17 12:00:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:18,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798060414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:18,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:18,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 28 [2023-11-17 12:00:18,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775607351] [2023-11-17 12:00:18,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:18,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 12:00:18,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 12:00:18,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2023-11-17 12:00:18,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:18,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 214 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:18,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:18,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:18,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:19,497 INFO L124 PetriNetUnfolderBase]: 516/856 cut-off events. [2023-11-17 12:00:19,497 INFO L125 PetriNetUnfolderBase]: For 925/925 co-relation queries the response was YES. [2023-11-17 12:00:19,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3372 conditions, 856 events. 516/856 cut-off events. For 925/925 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3584 event pairs, 106 based on Foata normal form. 20/873 useless extension candidates. Maximal degree in co-relation 2641. Up to 247 conditions per place. [2023-11-17 12:00:19,501 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 88 selfloop transitions, 68 changer transitions 21/177 dead transitions. [2023-11-17 12:00:19,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 177 transitions, 1303 flow [2023-11-17 12:00:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:00:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:00:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 218 transitions. [2023-11-17 12:00:19,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15527065527065528 [2023-11-17 12:00:19,503 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 218 transitions. [2023-11-17 12:00:19,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 218 transitions. [2023-11-17 12:00:19,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:19,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 218 transitions. [2023-11-17 12:00:19,504 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 12:00:19,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 52.0) internal successors, (1456), 28 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:19,505 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 52.0) internal successors, (1456), 28 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:19,505 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 214 flow. Second operand 27 states and 218 transitions. [2023-11-17 12:00:19,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 177 transitions, 1303 flow [2023-11-17 12:00:19,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 177 transitions, 1293 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:00:19,509 INFO L231 Difference]: Finished difference. Result has 81 places, 104 transitions, 909 flow [2023-11-17 12:00:19,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=909, PETRI_PLACES=81, PETRI_TRANSITIONS=104} [2023-11-17 12:00:19,509 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 58 predicate places. [2023-11-17 12:00:19,509 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 104 transitions, 909 flow [2023-11-17 12:00:19,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:19,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:19,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:19,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-17 12:00:19,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:19,721 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:19,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1444187112, now seen corresponding path program 1 times [2023-11-17 12:00:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:19,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870291078] [2023-11-17 12:00:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:19,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:20,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:20,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870291078] [2023-11-17 12:00:20,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870291078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:20,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926591960] [2023-11-17 12:00:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:20,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:20,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:20,248 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:20,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 12:00:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:20,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 12:00:20,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:20,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:00:20,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:00:20,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:00:20,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:00:20,613 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:00:20,613 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 20 treesize of output 18 [2023-11-17 12:00:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:20,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:20,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:20,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 31 [2023-11-17 12:00:20,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:20,915 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 70 treesize of output 66 [2023-11-17 12:00:20,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:20,924 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 12:00:20,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:20,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 54 [2023-11-17 12:00:20,966 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 12:00:20,967 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 636 treesize of output 556 [2023-11-17 12:00:20,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:20,981 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 284 [2023-11-17 12:00:20,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:20,993 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 230 treesize of output 206 [2023-11-17 12:00:21,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:21,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 31 [2023-11-17 12:00:21,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:21,245 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 70 treesize of output 66 [2023-11-17 12:00:21,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:21,254 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 12:00:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:21,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926591960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:21,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:21,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-11-17 12:00:21,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861024621] [2023-11-17 12:00:21,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:21,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:00:21,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:21,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:00:21,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=599, Unknown=9, NotChecked=0, Total=702 [2023-11-17 12:00:21,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:21,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 104 transitions, 909 flow. Second operand has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 27 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 12:00:21,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:21,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:21,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:21,871 INFO L124 PetriNetUnfolderBase]: 580/980 cut-off events. [2023-11-17 12:00:21,871 INFO L125 PetriNetUnfolderBase]: For 3061/3061 co-relation queries the response was YES. [2023-11-17 12:00:21,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4821 conditions, 980 events. 580/980 cut-off events. For 3061/3061 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4379 event pairs, 52 based on Foata normal form. 32/1012 useless extension candidates. Maximal degree in co-relation 4765. Up to 416 conditions per place. [2023-11-17 12:00:21,876 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 99 selfloop transitions, 37 changer transitions 0/136 dead transitions. [2023-11-17 12:00:21,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 136 transitions, 1426 flow [2023-11-17 12:00:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:00:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:00:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 81 transitions. [2023-11-17 12:00:21,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15576923076923077 [2023-11-17 12:00:21,878 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 81 transitions. [2023-11-17 12:00:21,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 81 transitions. [2023-11-17 12:00:21,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:21,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 81 transitions. [2023-11-17 12:00:21,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.1) internal successors, (81), 10 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 12:00:21,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:21,879 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:21,879 INFO L175 Difference]: Start difference. First operand has 81 places, 104 transitions, 909 flow. Second operand 10 states and 81 transitions. [2023-11-17 12:00:21,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 136 transitions, 1426 flow [2023-11-17 12:00:21,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 136 transitions, 1244 flow, removed 47 selfloop flow, removed 13 redundant places. [2023-11-17 12:00:21,892 INFO L231 Difference]: Finished difference. Result has 75 places, 108 transitions, 874 flow [2023-11-17 12:00:21,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=874, PETRI_PLACES=75, PETRI_TRANSITIONS=108} [2023-11-17 12:00:21,892 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 52 predicate places. [2023-11-17 12:00:21,892 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 108 transitions, 874 flow [2023-11-17 12:00:21,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 27 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 12:00:21,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:21,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:21,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:22,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:22,099 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:22,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:22,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1139089421, now seen corresponding path program 2 times [2023-11-17 12:00:22,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:22,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13656528] [2023-11-17 12:00:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:22,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:22,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13656528] [2023-11-17 12:00:22,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13656528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849762217] [2023-11-17 12:00:22,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:00:22,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:22,515 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:22,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 12:00:22,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 12:00:22,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:22,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 12:00:22,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:22,840 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:00:22,840 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 83 treesize of output 47 [2023-11-17 12:00:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:22,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:00:22,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849762217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:22,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:00:22,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 17 [2023-11-17 12:00:22,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48281624] [2023-11-17 12:00:22,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:22,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:00:22,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:22,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:00:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:00:22,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:22,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 108 transitions, 874 flow. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:22,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:22,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:22,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:23,148 INFO L124 PetriNetUnfolderBase]: 656/1178 cut-off events. [2023-11-17 12:00:23,148 INFO L125 PetriNetUnfolderBase]: For 3624/3624 co-relation queries the response was YES. [2023-11-17 12:00:23,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 1178 events. 656/1178 cut-off events. For 3624/3624 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5984 event pairs, 152 based on Foata normal form. 20/1198 useless extension candidates. Maximal degree in co-relation 5223. Up to 699 conditions per place. [2023-11-17 12:00:23,159 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 97 selfloop transitions, 39 changer transitions 11/147 dead transitions. [2023-11-17 12:00:23,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 147 transitions, 1421 flow [2023-11-17 12:00:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2023-11-17 12:00:23,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1794871794871795 [2023-11-17 12:00:23,160 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 84 transitions. [2023-11-17 12:00:23,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 84 transitions. [2023-11-17 12:00:23,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:23,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 84 transitions. [2023-11-17 12:00:23,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:23,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:23,161 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:23,161 INFO L175 Difference]: Start difference. First operand has 75 places, 108 transitions, 874 flow. Second operand 9 states and 84 transitions. [2023-11-17 12:00:23,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 147 transitions, 1421 flow [2023-11-17 12:00:23,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 147 transitions, 1346 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-17 12:00:23,172 INFO L231 Difference]: Finished difference. Result has 80 places, 113 transitions, 961 flow [2023-11-17 12:00:23,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=961, PETRI_PLACES=80, PETRI_TRANSITIONS=113} [2023-11-17 12:00:23,172 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 57 predicate places. [2023-11-17 12:00:23,172 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 113 transitions, 961 flow [2023-11-17 12:00:23,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:23,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:23,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:23,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:23,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-17 12:00:23,378 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:23,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:23,378 INFO L85 PathProgramCache]: Analyzing trace with hash 675256053, now seen corresponding path program 3 times [2023-11-17 12:00:23,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:23,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981754618] [2023-11-17 12:00:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:23,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:23,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:23,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981754618] [2023-11-17 12:00:23,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981754618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:23,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850457267] [2023-11-17 12:00:23,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:00:23,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:23,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:23,927 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:23,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 12:00:24,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 12:00:24,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:24,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:00:24,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:24,184 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:00:24,184 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 83 treesize of output 47 [2023-11-17 12:00:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:24,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:00:24,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850457267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:24,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:00:24,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2023-11-17 12:00:24,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706292014] [2023-11-17 12:00:24,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:24,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:00:24,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:24,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:00:24,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:00:24,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:24,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 113 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:24,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:24,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:24,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:24,484 INFO L124 PetriNetUnfolderBase]: 638/1184 cut-off events. [2023-11-17 12:00:24,484 INFO L125 PetriNetUnfolderBase]: For 4003/4003 co-relation queries the response was YES. [2023-11-17 12:00:24,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5758 conditions, 1184 events. 638/1184 cut-off events. For 4003/4003 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6298 event pairs, 168 based on Foata normal form. 8/1192 useless extension candidates. Maximal degree in co-relation 5698. Up to 829 conditions per place. [2023-11-17 12:00:24,489 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 83 selfloop transitions, 42 changer transitions 15/140 dead transitions. [2023-11-17 12:00:24,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 140 transitions, 1457 flow [2023-11-17 12:00:24,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2023-11-17 12:00:24,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1581196581196581 [2023-11-17 12:00:24,492 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 74 transitions. [2023-11-17 12:00:24,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 74 transitions. [2023-11-17 12:00:24,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:24,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 74 transitions. [2023-11-17 12:00:24,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 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 12:00:24,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:24,493 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:24,493 INFO L175 Difference]: Start difference. First operand has 80 places, 113 transitions, 961 flow. Second operand 9 states and 74 transitions. [2023-11-17 12:00:24,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 140 transitions, 1457 flow [2023-11-17 12:00:24,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 1415 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-17 12:00:24,504 INFO L231 Difference]: Finished difference. Result has 84 places, 114 transitions, 1043 flow [2023-11-17 12:00:24,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1043, PETRI_PLACES=84, PETRI_TRANSITIONS=114} [2023-11-17 12:00:24,504 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 61 predicate places. [2023-11-17 12:00:24,504 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 114 transitions, 1043 flow [2023-11-17 12:00:24,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:24,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:24,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:24,513 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 12:00:24,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:24,710 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:24,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2029941283, now seen corresponding path program 4 times [2023-11-17 12:00:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:24,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376164308] [2023-11-17 12:00:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:25,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:25,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376164308] [2023-11-17 12:00:25,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376164308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:25,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239745534] [2023-11-17 12:00:25,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:00:25,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:25,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:25,441 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:25,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 12:00:25,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:00:25,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:25,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 12:00:25,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:25,672 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:00:25,672 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 83 treesize of output 52 [2023-11-17 12:00:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:25,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:00:25,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239745534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:25,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:00:25,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 18 [2023-11-17 12:00:25,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874231841] [2023-11-17 12:00:25,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:25,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:00:25,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:25,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:00:25,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:00:25,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:25,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 114 transitions, 1043 flow. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:25,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:25,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:25,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:25,918 INFO L124 PetriNetUnfolderBase]: 622/1140 cut-off events. [2023-11-17 12:00:25,919 INFO L125 PetriNetUnfolderBase]: For 3961/3961 co-relation queries the response was YES. [2023-11-17 12:00:25,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5687 conditions, 1140 events. 622/1140 cut-off events. For 3961/3961 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5910 event pairs, 168 based on Foata normal form. 4/1144 useless extension candidates. Maximal degree in co-relation 5626. Up to 829 conditions per place. [2023-11-17 12:00:25,924 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 68 selfloop transitions, 49 changer transitions 11/128 dead transitions. [2023-11-17 12:00:25,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 128 transitions, 1401 flow [2023-11-17 12:00:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2023-11-17 12:00:25,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1581196581196581 [2023-11-17 12:00:25,925 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 74 transitions. [2023-11-17 12:00:25,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 74 transitions. [2023-11-17 12:00:25,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:25,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 74 transitions. [2023-11-17 12:00:25,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 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 12:00:25,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:25,926 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:25,926 INFO L175 Difference]: Start difference. First operand has 84 places, 114 transitions, 1043 flow. Second operand 9 states and 74 transitions. [2023-11-17 12:00:25,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 128 transitions, 1401 flow [2023-11-17 12:00:25,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 128 transitions, 1350 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-17 12:00:25,937 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 1050 flow [2023-11-17 12:00:25,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1050, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2023-11-17 12:00:25,937 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 64 predicate places. [2023-11-17 12:00:25,937 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 1050 flow [2023-11-17 12:00:25,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:25,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:25,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:25,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-17 12:00:26,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:26,143 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:26,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1283973598, now seen corresponding path program 2 times [2023-11-17 12:00:26,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:26,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327358541] [2023-11-17 12:00:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:26,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:26,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:26,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327358541] [2023-11-17 12:00:26,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327358541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:26,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908329497] [2023-11-17 12:00:26,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:00:26,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:26,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:26,402 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:26,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 12:00:26,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:00:26,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:26,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:00:26,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:26,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:26,682 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 12:00:26,682 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 51 treesize of output 84 [2023-11-17 12:00:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:26,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908329497] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:26,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:00:26,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 20 [2023-11-17 12:00:26,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595107310] [2023-11-17 12:00:26,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:00:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:00:26,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:00:26,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:26,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 1050 flow. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:26,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:26,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:26,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:27,013 INFO L124 PetriNetUnfolderBase]: 626/1132 cut-off events. [2023-11-17 12:00:27,013 INFO L125 PetriNetUnfolderBase]: For 4397/4397 co-relation queries the response was YES. [2023-11-17 12:00:27,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5635 conditions, 1132 events. 626/1132 cut-off events. For 4397/4397 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5722 event pairs, 154 based on Foata normal form. 32/1164 useless extension candidates. Maximal degree in co-relation 5574. Up to 804 conditions per place. [2023-11-17 12:00:27,018 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 73 selfloop transitions, 50 changer transitions 0/123 dead transitions. [2023-11-17 12:00:27,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 123 transitions, 1386 flow [2023-11-17 12:00:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2023-11-17 12:00:27,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1581196581196581 [2023-11-17 12:00:27,026 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 74 transitions. [2023-11-17 12:00:27,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 74 transitions. [2023-11-17 12:00:27,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:27,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 74 transitions. [2023-11-17 12:00:27,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 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 12:00:27,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:27,027 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:27,027 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 1050 flow. Second operand 9 states and 74 transitions. [2023-11-17 12:00:27,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 123 transitions, 1386 flow [2023-11-17 12:00:27,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 1288 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-17 12:00:27,051 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 1043 flow [2023-11-17 12:00:27,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1043, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2023-11-17 12:00:27,052 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 63 predicate places. [2023-11-17 12:00:27,052 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 1043 flow [2023-11-17 12:00:27,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:27,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:27,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:27,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:27,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:27,253 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:27,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash -448366157, now seen corresponding path program 5 times [2023-11-17 12:00:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:27,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512374901] [2023-11-17 12:00:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:27,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:27,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512374901] [2023-11-17 12:00:27,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512374901] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:27,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731044818] [2023-11-17 12:00:27,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:00:27,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:27,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:27,943 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:27,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 12:00:28,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:00:28,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:28,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 12:00:28,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:28,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:00:28,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:00:28,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:00:28,314 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:00:28,315 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 83 treesize of output 47 [2023-11-17 12:00:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:28,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:32,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:32,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-11-17 12:00:32,873 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:00:32,873 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 1142 treesize of output 1021 [2023-11-17 12:00:32,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:32,890 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 246 treesize of output 238 [2023-11-17 12:00:32,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:32,903 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 230 treesize of output 206 [2023-11-17 12:00:33,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:33,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-11-17 12:00:33,138 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:00:33,138 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 566 treesize of output 509 [2023-11-17 12:00:33,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:33,148 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 246 treesize of output 238 [2023-11-17 12:00:33,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:33,158 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 230 treesize of output 206 [2023-11-17 12:00:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:33,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731044818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:33,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:33,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-11-17 12:00:33,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115239537] [2023-11-17 12:00:33,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:33,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 12:00:33,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:33,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 12:00:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=779, Unknown=14, NotChecked=0, Total=930 [2023-11-17 12:00:33,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:33,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 1043 flow. Second operand has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 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 12:00:33,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:33,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:33,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:34,417 INFO L124 PetriNetUnfolderBase]: 720/1298 cut-off events. [2023-11-17 12:00:34,417 INFO L125 PetriNetUnfolderBase]: For 6285/6285 co-relation queries the response was YES. [2023-11-17 12:00:34,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6902 conditions, 1298 events. 720/1298 cut-off events. For 6285/6285 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6803 event pairs, 192 based on Foata normal form. 12/1310 useless extension candidates. Maximal degree in co-relation 6208. Up to 885 conditions per place. [2023-11-17 12:00:34,423 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 74 selfloop transitions, 68 changer transitions 14/156 dead transitions. [2023-11-17 12:00:34,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1876 flow [2023-11-17 12:00:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:00:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:00:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 108 transitions. [2023-11-17 12:00:34,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13846153846153847 [2023-11-17 12:00:34,425 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 108 transitions. [2023-11-17 12:00:34,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 108 transitions. [2023-11-17 12:00:34,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:34,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 108 transitions. [2023-11-17 12:00:34,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:34,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:34,427 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:34,427 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 1043 flow. Second operand 15 states and 108 transitions. [2023-11-17 12:00:34,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1876 flow [2023-11-17 12:00:34,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 156 transitions, 1743 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-17 12:00:34,439 INFO L231 Difference]: Finished difference. Result has 98 places, 123 transitions, 1401 flow [2023-11-17 12:00:34,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1401, PETRI_PLACES=98, PETRI_TRANSITIONS=123} [2023-11-17 12:00:34,440 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 75 predicate places. [2023-11-17 12:00:34,440 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 123 transitions, 1401 flow [2023-11-17 12:00:34,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 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 12:00:34,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:34,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:34,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:34,646 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,SelfDestructingSolverStorable25 [2023-11-17 12:00:34,646 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:34,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:34,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1411103687, now seen corresponding path program 6 times [2023-11-17 12:00:34,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:34,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123451662] [2023-11-17 12:00:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:34,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:34,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:34,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123451662] [2023-11-17 12:00:34,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123451662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:34,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220089133] [2023-11-17 12:00:34,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:00:34,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:34,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:34,997 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:34,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 12:00:35,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 12:00:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:35,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:00:35,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:35,283 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:00:35,284 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 83 treesize of output 52 [2023-11-17 12:00:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:35,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:00:35,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220089133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:35,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:00:35,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-11-17 12:00:35,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291057213] [2023-11-17 12:00:35,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:35,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:00:35,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:35,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:00:35,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:00:35,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:35,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 123 transitions, 1401 flow. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:35,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:35,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:35,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:35,576 INFO L124 PetriNetUnfolderBase]: 896/1546 cut-off events. [2023-11-17 12:00:35,576 INFO L125 PetriNetUnfolderBase]: For 10485/10485 co-relation queries the response was YES. [2023-11-17 12:00:35,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8812 conditions, 1546 events. 896/1546 cut-off events. For 10485/10485 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7950 event pairs, 196 based on Foata normal form. 20/1566 useless extension candidates. Maximal degree in co-relation 8747. Up to 1145 conditions per place. [2023-11-17 12:00:35,588 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 107 selfloop transitions, 48 changer transitions 12/167 dead transitions. [2023-11-17 12:00:35,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 167 transitions, 2204 flow [2023-11-17 12:00:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2023-11-17 12:00:35,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16452991452991453 [2023-11-17 12:00:35,590 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 77 transitions. [2023-11-17 12:00:35,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 77 transitions. [2023-11-17 12:00:35,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:35,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 77 transitions. [2023-11-17 12:00:35,591 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 12:00:35,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:35,591 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:35,592 INFO L175 Difference]: Start difference. First operand has 98 places, 123 transitions, 1401 flow. Second operand 9 states and 77 transitions. [2023-11-17 12:00:35,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 167 transitions, 2204 flow [2023-11-17 12:00:35,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 167 transitions, 2047 flow, removed 37 selfloop flow, removed 9 redundant places. [2023-11-17 12:00:35,619 INFO L231 Difference]: Finished difference. Result has 99 places, 142 transitions, 1715 flow [2023-11-17 12:00:35,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1715, PETRI_PLACES=99, PETRI_TRANSITIONS=142} [2023-11-17 12:00:35,620 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 76 predicate places. [2023-11-17 12:00:35,620 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 142 transitions, 1715 flow [2023-11-17 12:00:35,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:35,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:35,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:35,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:35,825 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,SelfDestructingSolverStorable26 [2023-11-17 12:00:35,825 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:35,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:35,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2009387403, now seen corresponding path program 7 times [2023-11-17 12:00:35,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:35,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119107988] [2023-11-17 12:00:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:35,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:36,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:36,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119107988] [2023-11-17 12:00:36,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119107988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:36,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318656471] [2023-11-17 12:00:36,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:00:36,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:36,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:36,167 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:36,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 12:00:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:36,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:00:36,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:36,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:00:36,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:00:36,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:00:36,586 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:00:36,586 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 83 treesize of output 47 [2023-11-17 12:00:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:36,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:37,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:37,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-11-17 12:00:37,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:37,186 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 278 treesize of output 257 [2023-11-17 12:00:37,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:37,201 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 278 treesize of output 254 [2023-11-17 12:00:37,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:37,211 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 246 treesize of output 238 [2023-11-17 12:00:37,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:37,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2023-11-17 12:00:37,397 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:00:37,398 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 630 treesize of output 573 [2023-11-17 12:00:37,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:37,412 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 246 treesize of output 222 [2023-11-17 12:00:37,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:37,423 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 214 treesize of output 206 [2023-11-17 12:00:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318656471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:37,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:37,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-11-17 12:00:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014518702] [2023-11-17 12:00:37,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:37,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 12:00:37,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 12:00:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=780, Unknown=10, NotChecked=0, Total=930 [2023-11-17 12:00:37,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:37,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 142 transitions, 1715 flow. Second operand has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 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 12:00:37,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:37,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:37,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:38,476 INFO L124 PetriNetUnfolderBase]: 1138/2084 cut-off events. [2023-11-17 12:00:38,476 INFO L125 PetriNetUnfolderBase]: For 15240/15240 co-relation queries the response was YES. [2023-11-17 12:00:38,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12327 conditions, 2084 events. 1138/2084 cut-off events. For 15240/15240 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12376 event pairs, 256 based on Foata normal form. 15/2099 useless extension candidates. Maximal degree in co-relation 12205. Up to 1072 conditions per place. [2023-11-17 12:00:38,489 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 183 selfloop transitions, 67 changer transitions 19/269 dead transitions. [2023-11-17 12:00:38,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 269 transitions, 3442 flow [2023-11-17 12:00:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:00:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:00:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 159 transitions. [2023-11-17 12:00:38,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16093117408906882 [2023-11-17 12:00:38,490 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 159 transitions. [2023-11-17 12:00:38,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 159 transitions. [2023-11-17 12:00:38,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:38,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 159 transitions. [2023-11-17 12:00:38,491 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 12:00:38,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:38,492 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:38,492 INFO L175 Difference]: Start difference. First operand has 99 places, 142 transitions, 1715 flow. Second operand 19 states and 159 transitions. [2023-11-17 12:00:38,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 269 transitions, 3442 flow [2023-11-17 12:00:38,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 269 transitions, 3217 flow, removed 109 selfloop flow, removed 4 redundant places. [2023-11-17 12:00:38,558 INFO L231 Difference]: Finished difference. Result has 117 places, 160 transitions, 1923 flow [2023-11-17 12:00:38,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1923, PETRI_PLACES=117, PETRI_TRANSITIONS=160} [2023-11-17 12:00:38,559 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 94 predicate places. [2023-11-17 12:00:38,559 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 160 transitions, 1923 flow [2023-11-17 12:00:38,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 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 12:00:38,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:38,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:38,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:38,764 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,SelfDestructingSolverStorable27 [2023-11-17 12:00:38,765 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:38,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:38,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2101456706, now seen corresponding path program 3 times [2023-11-17 12:00:38,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:38,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088105208] [2023-11-17 12:00:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:38,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:39,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:39,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088105208] [2023-11-17 12:00:39,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088105208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:39,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853013146] [2023-11-17 12:00:39,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:00:39,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:39,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:39,026 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:39,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 12:00:39,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:00:39,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:39,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:00:39,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:39,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:39,327 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 12:00:39,328 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 51 treesize of output 84 [2023-11-17 12:00:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:39,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853013146] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:39,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:00:39,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 19 [2023-11-17 12:00:39,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187185064] [2023-11-17 12:00:39,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:39,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:00:39,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:00:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:00:39,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:39,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 160 transitions, 1923 flow. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:39,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:39,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:39,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:39,746 INFO L124 PetriNetUnfolderBase]: 1083/1984 cut-off events. [2023-11-17 12:00:39,747 INFO L125 PetriNetUnfolderBase]: For 11944/11944 co-relation queries the response was YES. [2023-11-17 12:00:39,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11215 conditions, 1984 events. 1083/1984 cut-off events. For 11944/11944 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 11573 event pairs, 308 based on Foata normal form. 40/2024 useless extension candidates. Maximal degree in co-relation 11059. Up to 1563 conditions per place. [2023-11-17 12:00:39,758 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 119 selfloop transitions, 64 changer transitions 3/186 dead transitions. [2023-11-17 12:00:39,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 186 transitions, 2492 flow [2023-11-17 12:00:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2023-11-17 12:00:39,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1581196581196581 [2023-11-17 12:00:39,759 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 74 transitions. [2023-11-17 12:00:39,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 74 transitions. [2023-11-17 12:00:39,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:39,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 74 transitions. [2023-11-17 12:00:39,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 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 12:00:39,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:39,760 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:39,760 INFO L175 Difference]: Start difference. First operand has 117 places, 160 transitions, 1923 flow. Second operand 9 states and 74 transitions. [2023-11-17 12:00:39,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 186 transitions, 2492 flow [2023-11-17 12:00:39,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 186 transitions, 2452 flow, removed 14 selfloop flow, removed 10 redundant places. [2023-11-17 12:00:39,795 INFO L231 Difference]: Finished difference. Result has 111 places, 160 transitions, 1962 flow [2023-11-17 12:00:39,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1962, PETRI_PLACES=111, PETRI_TRANSITIONS=160} [2023-11-17 12:00:39,796 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 88 predicate places. [2023-11-17 12:00:39,796 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 160 transitions, 1962 flow [2023-11-17 12:00:39,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:39,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:39,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:39,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:39,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:39,998 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:39,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:39,998 INFO L85 PathProgramCache]: Analyzing trace with hash 631359417, now seen corresponding path program 8 times [2023-11-17 12:00:39,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:39,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524401909] [2023-11-17 12:00:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:39,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:40,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:40,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524401909] [2023-11-17 12:00:40,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524401909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:40,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431804331] [2023-11-17 12:00:40,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:00:40,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:40,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:40,692 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:40,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 12:00:40,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 12:00:40,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:40,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 12:00:40,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:41,110 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:00:41,111 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 83 treesize of output 47 [2023-11-17 12:00:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:41,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:00:41,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431804331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:41,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:00:41,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-11-17 12:00:41,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661510858] [2023-11-17 12:00:41,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:41,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:00:41,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:41,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:00:41,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:00:41,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:41,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 160 transitions, 1962 flow. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:41,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:41,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:41,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:41,476 INFO L124 PetriNetUnfolderBase]: 1043/1919 cut-off events. [2023-11-17 12:00:41,476 INFO L125 PetriNetUnfolderBase]: For 10154/10154 co-relation queries the response was YES. [2023-11-17 12:00:41,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11102 conditions, 1919 events. 1043/1919 cut-off events. For 10154/10154 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11173 event pairs, 278 based on Foata normal form. 15/1934 useless extension candidates. Maximal degree in co-relation 10886. Up to 1416 conditions per place. [2023-11-17 12:00:41,485 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 109 selfloop transitions, 63 changer transitions 12/184 dead transitions. [2023-11-17 12:00:41,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 184 transitions, 2518 flow [2023-11-17 12:00:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2023-11-17 12:00:41,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1581196581196581 [2023-11-17 12:00:41,488 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 74 transitions. [2023-11-17 12:00:41,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 74 transitions. [2023-11-17 12:00:41,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:41,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 74 transitions. [2023-11-17 12:00:41,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 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 12:00:41,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:41,489 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:41,489 INFO L175 Difference]: Start difference. First operand has 111 places, 160 transitions, 1962 flow. Second operand 9 states and 74 transitions. [2023-11-17 12:00:41,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 184 transitions, 2518 flow [2023-11-17 12:00:41,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 184 transitions, 2337 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-11-17 12:00:41,513 INFO L231 Difference]: Finished difference. Result has 108 places, 159 transitions, 1924 flow [2023-11-17 12:00:41,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1924, PETRI_PLACES=108, PETRI_TRANSITIONS=159} [2023-11-17 12:00:41,514 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 85 predicate places. [2023-11-17 12:00:41,514 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 159 transitions, 1924 flow [2023-11-17 12:00:41,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:41,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:41,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:41,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:41,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:41,715 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:41,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:41,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1482602087, now seen corresponding path program 9 times [2023-11-17 12:00:41,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:41,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609129205] [2023-11-17 12:00:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:42,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609129205] [2023-11-17 12:00:42,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609129205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:42,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382256546] [2023-11-17 12:00:42,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:00:42,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:42,049 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:42,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 12:00:42,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 12:00:42,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:42,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:00:42,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:42,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:00:42,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382256546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:42,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:00:42,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2023-11-17 12:00:42,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582647391] [2023-11-17 12:00:42,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:42,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:00:42,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:42,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:00:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:00:42,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:42,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 159 transitions, 1924 flow. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:42,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:42,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:42,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:42,693 INFO L124 PetriNetUnfolderBase]: 1028/1854 cut-off events. [2023-11-17 12:00:42,693 INFO L125 PetriNetUnfolderBase]: For 9314/9314 co-relation queries the response was YES. [2023-11-17 12:00:42,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10722 conditions, 1854 events. 1028/1854 cut-off events. For 9314/9314 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10445 event pairs, 273 based on Foata normal form. 5/1859 useless extension candidates. Maximal degree in co-relation 10634. Up to 1381 conditions per place. [2023-11-17 12:00:42,703 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 107 selfloop transitions, 60 changer transitions 10/177 dead transitions. [2023-11-17 12:00:42,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 177 transitions, 2375 flow [2023-11-17 12:00:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2023-11-17 12:00:42,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15384615384615385 [2023-11-17 12:00:42,704 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 72 transitions. [2023-11-17 12:00:42,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 72 transitions. [2023-11-17 12:00:42,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:42,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 72 transitions. [2023-11-17 12:00:42,704 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 12:00:42,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:42,705 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:42,705 INFO L175 Difference]: Start difference. First operand has 108 places, 159 transitions, 1924 flow. Second operand 9 states and 72 transitions. [2023-11-17 12:00:42,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 177 transitions, 2375 flow [2023-11-17 12:00:42,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 177 transitions, 2236 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-17 12:00:42,729 INFO L231 Difference]: Finished difference. Result has 108 places, 154 transitions, 1833 flow [2023-11-17 12:00:42,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1833, PETRI_PLACES=108, PETRI_TRANSITIONS=154} [2023-11-17 12:00:42,729 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 85 predicate places. [2023-11-17 12:00:42,729 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 154 transitions, 1833 flow [2023-11-17 12:00:42,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:42,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:42,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:42,735 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 12:00:42,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-17 12:00:42,933 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:42,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1668486037, now seen corresponding path program 10 times [2023-11-17 12:00:42,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:42,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270021625] [2023-11-17 12:00:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:42,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:43,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:43,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270021625] [2023-11-17 12:00:43,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270021625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:43,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803083818] [2023-11-17 12:00:43,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:00:43,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:43,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:43,299 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:43,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 12:00:43,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:00:43,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:43,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:00:43,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:43,679 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:00:43,679 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 83 treesize of output 52 [2023-11-17 12:00:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:43,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:43,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:43,933 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 106 treesize of output 118 [2023-11-17 12:00:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:44,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803083818] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:44,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:00:44,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 10] total 25 [2023-11-17 12:00:44,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341929222] [2023-11-17 12:00:44,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:44,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:00:44,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:44,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:00:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:00:44,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:44,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 154 transitions, 1833 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:44,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:44,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:44,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:44,698 INFO L124 PetriNetUnfolderBase]: 1313/2314 cut-off events. [2023-11-17 12:00:44,698 INFO L125 PetriNetUnfolderBase]: For 11107/11107 co-relation queries the response was YES. [2023-11-17 12:00:44,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13099 conditions, 2314 events. 1313/2314 cut-off events. For 11107/11107 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13456 event pairs, 206 based on Foata normal form. 5/2319 useless extension candidates. Maximal degree in co-relation 12997. Up to 989 conditions per place. [2023-11-17 12:00:44,708 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 133 selfloop transitions, 83 changer transitions 6/222 dead transitions. [2023-11-17 12:00:44,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 222 transitions, 2919 flow [2023-11-17 12:00:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:00:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:00:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2023-11-17 12:00:44,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23351648351648352 [2023-11-17 12:00:44,709 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 85 transitions. [2023-11-17 12:00:44,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 85 transitions. [2023-11-17 12:00:44,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:44,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 85 transitions. [2023-11-17 12:00:44,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 12:00:44,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:44,710 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:44,710 INFO L175 Difference]: Start difference. First operand has 108 places, 154 transitions, 1833 flow. Second operand 7 states and 85 transitions. [2023-11-17 12:00:44,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 222 transitions, 2919 flow [2023-11-17 12:00:44,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 222 transitions, 2755 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-17 12:00:44,737 INFO L231 Difference]: Finished difference. Result has 106 places, 182 transitions, 2314 flow [2023-11-17 12:00:44,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2314, PETRI_PLACES=106, PETRI_TRANSITIONS=182} [2023-11-17 12:00:44,737 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 83 predicate places. [2023-11-17 12:00:44,737 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 182 transitions, 2314 flow [2023-11-17 12:00:44,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:44,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:44,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:44,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:44,940 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,SelfDestructingSolverStorable31 [2023-11-17 12:00:44,941 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:44,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2102194223, now seen corresponding path program 11 times [2023-11-17 12:00:44,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:44,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233467165] [2023-11-17 12:00:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:44,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:45,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:45,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233467165] [2023-11-17 12:00:45,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233467165] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:45,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69626364] [2023-11-17 12:00:45,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:00:45,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:45,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:45,631 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:45,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 12:00:45,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:00:45,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:45,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 12:00:45,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:45,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:00:45,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:00:46,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:00:46,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:00:46,070 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:00:46,071 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 56 treesize of output 46 [2023-11-17 12:00:46,230 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:00:46,230 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 83 treesize of output 47 [2023-11-17 12:00:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:46,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:47,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:47,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 93 [2023-11-17 12:00:47,082 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 12:00:47,082 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 685 treesize of output 589 [2023-11-17 12:00:47,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:47,105 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 523 treesize of output 467 [2023-11-17 12:00:47,121 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:47,121 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 565 treesize of output 525 [2023-11-17 12:00:48,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:48,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 32 [2023-11-17 12:00:48,893 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:00:48,893 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 74 treesize of output 65 [2023-11-17 12:00:48,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:48,901 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 12:00:48,924 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:00:48,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 1 [2023-11-17 12:00:48,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:48,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 47 [2023-11-17 12:00:48,946 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:00:48,946 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 131 treesize of output 106 [2023-11-17 12:00:48,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:48,956 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 107 treesize of output 99 [2023-11-17 12:00:48,989 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:00:48,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 1 [2023-11-17 12:00:48,996 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:00:48,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 1 [2023-11-17 12:00:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:49,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69626364] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:49,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:49,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2023-11-17 12:00:49,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886772437] [2023-11-17 12:00:49,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:49,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 12:00:49,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:49,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 12:00:49,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=913, Unknown=22, NotChecked=0, Total=1056 [2023-11-17 12:00:49,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:49,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 182 transitions, 2314 flow. Second operand has 33 states, 33 states have (on average 4.545454545454546) internal successors, (150), 33 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 12:00:49,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:49,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:49,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:50,961 INFO L124 PetriNetUnfolderBase]: 1893/3204 cut-off events. [2023-11-17 12:00:50,961 INFO L125 PetriNetUnfolderBase]: For 17214/17214 co-relation queries the response was YES. [2023-11-17 12:00:50,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18715 conditions, 3204 events. 1893/3204 cut-off events. For 17214/17214 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19123 event pairs, 159 based on Foata normal form. 45/3249 useless extension candidates. Maximal degree in co-relation 18627. Up to 900 conditions per place. [2023-11-17 12:00:50,979 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 137 selfloop transitions, 151 changer transitions 21/309 dead transitions. [2023-11-17 12:00:50,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 309 transitions, 4195 flow [2023-11-17 12:00:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:00:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:00:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 140 transitions. [2023-11-17 12:00:50,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16826923076923078 [2023-11-17 12:00:50,981 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 140 transitions. [2023-11-17 12:00:50,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 140 transitions. [2023-11-17 12:00:50,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:50,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 140 transitions. [2023-11-17 12:00:50,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.75) internal successors, (140), 16 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:50,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:50,982 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:50,982 INFO L175 Difference]: Start difference. First operand has 106 places, 182 transitions, 2314 flow. Second operand 16 states and 140 transitions. [2023-11-17 12:00:50,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 309 transitions, 4195 flow [2023-11-17 12:00:51,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 309 transitions, 4101 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-11-17 12:00:51,035 INFO L231 Difference]: Finished difference. Result has 122 places, 226 transitions, 3200 flow [2023-11-17 12:00:51,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3200, PETRI_PLACES=122, PETRI_TRANSITIONS=226} [2023-11-17 12:00:51,035 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 99 predicate places. [2023-11-17 12:00:51,035 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 226 transitions, 3200 flow [2023-11-17 12:00:51,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.545454545454546) internal successors, (150), 33 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 12:00:51,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:51,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:51,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-17 12:00:51,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:51,236 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:51,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:51,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1257266580, now seen corresponding path program 1 times [2023-11-17 12:00:51,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:51,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219483718] [2023-11-17 12:00:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:51,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:51,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:51,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219483718] [2023-11-17 12:00:51,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219483718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:51,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390371871] [2023-11-17 12:00:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:51,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:51,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:51,495 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:51,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 12:00:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:51,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:00:51,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:51,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:51,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:51,837 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 124 treesize of output 88 [2023-11-17 12:00:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:00:52,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390371871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:52,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:52,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2023-11-17 12:00:52,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290298166] [2023-11-17 12:00:52,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:52,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:00:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:52,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:00:52,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:00:52,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:52,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 226 transitions, 3200 flow. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 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 12:00:52,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:52,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:52,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:52,910 INFO L124 PetriNetUnfolderBase]: 2095/3463 cut-off events. [2023-11-17 12:00:52,910 INFO L125 PetriNetUnfolderBase]: For 23194/23194 co-relation queries the response was YES. [2023-11-17 12:00:52,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22311 conditions, 3463 events. 2095/3463 cut-off events. For 23194/23194 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20161 event pairs, 421 based on Foata normal form. 35/3498 useless extension candidates. Maximal degree in co-relation 22206. Up to 1467 conditions per place. [2023-11-17 12:00:52,929 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 225 selfloop transitions, 191 changer transitions 33/449 dead transitions. [2023-11-17 12:00:52,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 449 transitions, 6870 flow [2023-11-17 12:00:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:00:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:00:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 180 transitions. [2023-11-17 12:00:52,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.18218623481781376 [2023-11-17 12:00:52,930 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 180 transitions. [2023-11-17 12:00:52,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 180 transitions. [2023-11-17 12:00:52,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:52,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 180 transitions. [2023-11-17 12:00:52,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 9.473684210526315) internal successors, (180), 19 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:52,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:52,932 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:52,932 INFO L175 Difference]: Start difference. First operand has 122 places, 226 transitions, 3200 flow. Second operand 19 states and 180 transitions. [2023-11-17 12:00:52,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 449 transitions, 6870 flow [2023-11-17 12:00:52,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 449 transitions, 6635 flow, removed 20 selfloop flow, removed 11 redundant places. [2023-11-17 12:00:52,997 INFO L231 Difference]: Finished difference. Result has 137 places, 312 transitions, 5027 flow [2023-11-17 12:00:52,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3064, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5027, PETRI_PLACES=137, PETRI_TRANSITIONS=312} [2023-11-17 12:00:52,997 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 114 predicate places. [2023-11-17 12:00:52,997 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 312 transitions, 5027 flow [2023-11-17 12:00:52,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 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 12:00:52,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:52,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:53,005 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 12:00:53,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:53,206 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:53,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:53,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1659773187, now seen corresponding path program 1 times [2023-11-17 12:00:53,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:53,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485325254] [2023-11-17 12:00:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:53,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:53,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:53,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485325254] [2023-11-17 12:00:53,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485325254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:53,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851336297] [2023-11-17 12:00:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:53,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:53,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:53,393 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:53,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 12:00:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:53,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:00:53,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:53,534 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:00:53,534 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 10 [2023-11-17 12:00:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:53,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:53,581 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:00:53,582 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 40 treesize of output 56 [2023-11-17 12:00:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:53,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851336297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:53,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:53,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-11-17 12:00:53,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206925832] [2023-11-17 12:00:53,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:53,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:00:53,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:53,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:00:53,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:00:53,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:53,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 312 transitions, 5027 flow. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 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 12:00:53,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:53,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:53,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:54,135 INFO L124 PetriNetUnfolderBase]: 2008/3358 cut-off events. [2023-11-17 12:00:54,135 INFO L125 PetriNetUnfolderBase]: For 27763/27763 co-relation queries the response was YES. [2023-11-17 12:00:54,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22879 conditions, 3358 events. 2008/3358 cut-off events. For 27763/27763 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 19921 event pairs, 596 based on Foata normal form. 22/3380 useless extension candidates. Maximal degree in co-relation 21986. Up to 2804 conditions per place. [2023-11-17 12:00:54,156 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 234 selfloop transitions, 82 changer transitions 12/328 dead transitions. [2023-11-17 12:00:54,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 328 transitions, 5785 flow [2023-11-17 12:00:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2023-11-17 12:00:54,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15598290598290598 [2023-11-17 12:00:54,157 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 73 transitions. [2023-11-17 12:00:54,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 73 transitions. [2023-11-17 12:00:54,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:54,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 73 transitions. [2023-11-17 12:00:54,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:54,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:54,158 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:54,158 INFO L175 Difference]: Start difference. First operand has 137 places, 312 transitions, 5027 flow. Second operand 9 states and 73 transitions. [2023-11-17 12:00:54,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 328 transitions, 5785 flow [2023-11-17 12:00:54,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 328 transitions, 5564 flow, removed 45 selfloop flow, removed 6 redundant places. [2023-11-17 12:00:54,246 INFO L231 Difference]: Finished difference. Result has 139 places, 303 transitions, 4850 flow [2023-11-17 12:00:54,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4850, PETRI_PLACES=139, PETRI_TRANSITIONS=303} [2023-11-17 12:00:54,246 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 116 predicate places. [2023-11-17 12:00:54,246 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 303 transitions, 4850 flow [2023-11-17 12:00:54,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 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 12:00:54,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:54,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:54,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:54,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:54,447 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:54,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1541857691, now seen corresponding path program 2 times [2023-11-17 12:00:54,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:54,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417339331] [2023-11-17 12:00:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:54,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:54,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:54,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417339331] [2023-11-17 12:00:54,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417339331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:54,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994511449] [2023-11-17 12:00:54,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:00:54,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:54,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:54,612 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:54,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 12:00:54,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:00:54,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:54,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:00:54,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:54,834 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:00:54,834 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 10 [2023-11-17 12:00:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:54,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:54,895 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 12:00:54,895 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 12:00:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:54,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994511449] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:54,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:00:54,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 15 [2023-11-17 12:00:54,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197614965] [2023-11-17 12:00:54,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:54,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:00:54,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:00:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:00:54,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:54,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 303 transitions, 4850 flow. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:54,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:54,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:54,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:55,371 INFO L124 PetriNetUnfolderBase]: 1986/3336 cut-off events. [2023-11-17 12:00:55,371 INFO L125 PetriNetUnfolderBase]: For 27465/27465 co-relation queries the response was YES. [2023-11-17 12:00:55,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22282 conditions, 3336 events. 1986/3336 cut-off events. For 27465/27465 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 19909 event pairs, 598 based on Foata normal form. 22/3358 useless extension candidates. Maximal degree in co-relation 21379. Up to 2636 conditions per place. [2023-11-17 12:00:55,421 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 265 selfloop transitions, 65 changer transitions 17/347 dead transitions. [2023-11-17 12:00:55,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 347 transitions, 6032 flow [2023-11-17 12:00:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:00:55,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:00:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2023-11-17 12:00:55,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1978021978021978 [2023-11-17 12:00:55,422 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 72 transitions. [2023-11-17 12:00:55,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 72 transitions. [2023-11-17 12:00:55,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:55,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 72 transitions. [2023-11-17 12:00:55,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 12:00:55,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:55,423 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:55,423 INFO L175 Difference]: Start difference. First operand has 139 places, 303 transitions, 4850 flow. Second operand 7 states and 72 transitions. [2023-11-17 12:00:55,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 347 transitions, 6032 flow [2023-11-17 12:00:55,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 347 transitions, 5903 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-11-17 12:00:55,492 INFO L231 Difference]: Finished difference. Result has 139 places, 301 transitions, 4877 flow [2023-11-17 12:00:55,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4743, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4877, PETRI_PLACES=139, PETRI_TRANSITIONS=301} [2023-11-17 12:00:55,493 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 116 predicate places. [2023-11-17 12:00:55,493 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 301 transitions, 4877 flow [2023-11-17 12:00:55,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:55,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:55,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:55,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:55,695 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,SelfDestructingSolverStorable35 [2023-11-17 12:00:55,696 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:55,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:55,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1816019981, now seen corresponding path program 3 times [2023-11-17 12:00:55,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:55,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069328141] [2023-11-17 12:00:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:55,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:55,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:55,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069328141] [2023-11-17 12:00:55,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069328141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:00:55,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:00:55,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 12:00:55,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412033278] [2023-11-17 12:00:55,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:00:55,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:00:55,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:00:55,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:00:55,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:55,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 301 transitions, 4877 flow. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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 12:00:55,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:55,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:55,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:56,320 INFO L124 PetriNetUnfolderBase]: 1935/3251 cut-off events. [2023-11-17 12:00:56,320 INFO L125 PetriNetUnfolderBase]: For 27365/27365 co-relation queries the response was YES. [2023-11-17 12:00:56,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21581 conditions, 3251 events. 1935/3251 cut-off events. For 27365/27365 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 19283 event pairs, 623 based on Foata normal form. 22/3273 useless extension candidates. Maximal degree in co-relation 20891. Up to 2782 conditions per place. [2023-11-17 12:00:56,337 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 229 selfloop transitions, 68 changer transitions 12/309 dead transitions. [2023-11-17 12:00:56,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 309 transitions, 5410 flow [2023-11-17 12:00:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:00:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:00:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 66 transitions. [2023-11-17 12:00:56,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15865384615384615 [2023-11-17 12:00:56,337 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 66 transitions. [2023-11-17 12:00:56,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 66 transitions. [2023-11-17 12:00:56,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:56,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 66 transitions. [2023-11-17 12:00:56,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:56,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:56,338 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:56,338 INFO L175 Difference]: Start difference. First operand has 139 places, 301 transitions, 4877 flow. Second operand 8 states and 66 transitions. [2023-11-17 12:00:56,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 309 transitions, 5410 flow [2023-11-17 12:00:56,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 309 transitions, 5305 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-17 12:00:56,408 INFO L231 Difference]: Finished difference. Result has 139 places, 288 transitions, 4604 flow [2023-11-17 12:00:56,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4604, PETRI_PLACES=139, PETRI_TRANSITIONS=288} [2023-11-17 12:00:56,408 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 116 predicate places. [2023-11-17 12:00:56,408 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 288 transitions, 4604 flow [2023-11-17 12:00:56,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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 12:00:56,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:56,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:56,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-11-17 12:00:56,409 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:56,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:56,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1166522587, now seen corresponding path program 4 times [2023-11-17 12:00:56,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:56,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645998161] [2023-11-17 12:00:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:56,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:56,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645998161] [2023-11-17 12:00:56,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645998161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:56,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180653593] [2023-11-17 12:00:56,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:00:56,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:56,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:56,661 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:56,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 12:00:56,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:00:56,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:56,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:00:56,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:56,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:00:56,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:00:56,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:00:56,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:00:56,926 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:00:56,926 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 23 treesize of output 21 [2023-11-17 12:00:56,972 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:00:56,973 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 10 [2023-11-17 12:00:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:00:56,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:57,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:57,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 54 [2023-11-17 12:00:57,149 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:00:57,149 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 360 treesize of output 319 [2023-11-17 12:00:57,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:57,160 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 262 treesize of output 239 [2023-11-17 12:00:57,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:57,170 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 280 treesize of output 264 [2023-11-17 12:00:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:00:57,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180653593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:57,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:57,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-11-17 12:00:57,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516954771] [2023-11-17 12:00:57,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:57,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:00:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:57,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:00:57,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=583, Unknown=13, NotChecked=0, Total=702 [2023-11-17 12:00:57,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:57,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 288 transitions, 4604 flow. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:57,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:57,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:57,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:58,261 INFO L124 PetriNetUnfolderBase]: 1869/3119 cut-off events. [2023-11-17 12:00:58,261 INFO L125 PetriNetUnfolderBase]: For 24880/24880 co-relation queries the response was YES. [2023-11-17 12:00:58,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20733 conditions, 3119 events. 1869/3119 cut-off events. For 24880/24880 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18005 event pairs, 579 based on Foata normal form. 22/3141 useless extension candidates. Maximal degree in co-relation 19854. Up to 2496 conditions per place. [2023-11-17 12:00:58,277 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 250 selfloop transitions, 58 changer transitions 15/323 dead transitions. [2023-11-17 12:00:58,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 323 transitions, 5412 flow [2023-11-17 12:00:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:00:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:00:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 103 transitions. [2023-11-17 12:00:58,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15236686390532544 [2023-11-17 12:00:58,278 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 103 transitions. [2023-11-17 12:00:58,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 103 transitions. [2023-11-17 12:00:58,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:58,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 103 transitions. [2023-11-17 12:00:58,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.923076923076923) internal successors, (103), 13 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:58,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 52.0) internal successors, (728), 14 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:58,280 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 52.0) internal successors, (728), 14 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:58,280 INFO L175 Difference]: Start difference. First operand has 139 places, 288 transitions, 4604 flow. Second operand 13 states and 103 transitions. [2023-11-17 12:00:58,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 323 transitions, 5412 flow [2023-11-17 12:00:58,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 323 transitions, 5256 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 12:00:58,337 INFO L231 Difference]: Finished difference. Result has 143 places, 274 transitions, 4270 flow [2023-11-17 12:00:58,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4236, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4270, PETRI_PLACES=143, PETRI_TRANSITIONS=274} [2023-11-17 12:00:58,338 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 120 predicate places. [2023-11-17 12:00:58,338 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 274 transitions, 4270 flow [2023-11-17 12:00:58,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:58,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:58,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:58,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-17 12:00:58,538 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,SelfDestructingSolverStorable37 [2023-11-17 12:00:58,539 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:58,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:58,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1026878927, now seen corresponding path program 5 times [2023-11-17 12:00:58,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:58,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208543542] [2023-11-17 12:00:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:58,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:58,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:58,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208543542] [2023-11-17 12:00:58,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208543542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:58,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144590281] [2023-11-17 12:00:58,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:00:58,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:58,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:58,721 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:58,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 12:00:58,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:00:58,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:58,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:00:58,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:58,886 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:00:58,887 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 10 [2023-11-17 12:00:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:58,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:58,936 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:00:58,937 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 40 treesize of output 56 [2023-11-17 12:00:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:00:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144590281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:58,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:58,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-11-17 12:00:58,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66172388] [2023-11-17 12:00:58,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:58,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:00:58,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:58,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:00:58,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:00:58,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:00:58,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 274 transitions, 4270 flow. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 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 12:00:58,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:58,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:00:58,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:59,549 INFO L124 PetriNetUnfolderBase]: 1941/3215 cut-off events. [2023-11-17 12:00:59,549 INFO L125 PetriNetUnfolderBase]: For 28493/28493 co-relation queries the response was YES. [2023-11-17 12:00:59,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21711 conditions, 3215 events. 1941/3215 cut-off events. For 28493/28493 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18547 event pairs, 478 based on Foata normal form. 22/3237 useless extension candidates. Maximal degree in co-relation 21209. Up to 2223 conditions per place. [2023-11-17 12:00:59,569 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 234 selfloop transitions, 88 changer transitions 10/332 dead transitions. [2023-11-17 12:00:59,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 332 transitions, 5873 flow [2023-11-17 12:00:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:00:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:00:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2023-11-17 12:00:59,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15384615384615385 [2023-11-17 12:00:59,570 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 72 transitions. [2023-11-17 12:00:59,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 72 transitions. [2023-11-17 12:00:59,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:59,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 72 transitions. [2023-11-17 12:00:59,570 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 12:00:59,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:59,571 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:59,571 INFO L175 Difference]: Start difference. First operand has 143 places, 274 transitions, 4270 flow. Second operand 9 states and 72 transitions. [2023-11-17 12:00:59,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 332 transitions, 5873 flow [2023-11-17 12:00:59,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 332 transitions, 5685 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-17 12:00:59,642 INFO L231 Difference]: Finished difference. Result has 140 places, 287 transitions, 4665 flow [2023-11-17 12:00:59,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4665, PETRI_PLACES=140, PETRI_TRANSITIONS=287} [2023-11-17 12:00:59,643 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 117 predicate places. [2023-11-17 12:00:59,643 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 287 transitions, 4665 flow [2023-11-17 12:00:59,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 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 12:00:59,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:59,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:59,651 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 12:00:59,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:00:59,844 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:00:59,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:59,845 INFO L85 PathProgramCache]: Analyzing trace with hash -513459919, now seen corresponding path program 6 times [2023-11-17 12:00:59,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:59,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013857526] [2023-11-17 12:00:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:59,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:01:00,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:00,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013857526] [2023-11-17 12:01:00,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013857526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:00,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430758705] [2023-11-17 12:01:00,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:00,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:00,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:00,007 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:00,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 12:01:00,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:01:00,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:00,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:01:00,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:00,151 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:01:00,151 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 10 [2023-11-17 12:01:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:01:00,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:00,206 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 12:01:00,206 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 12:01:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:01:00,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430758705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:00,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:00,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-11-17 12:01:00,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525950497] [2023-11-17 12:01:00,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:00,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:00,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 287 transitions, 4665 flow. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 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 12:01:00,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:00,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:00,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:00,790 INFO L124 PetriNetUnfolderBase]: 1886/3138 cut-off events. [2023-11-17 12:01:00,790 INFO L125 PetriNetUnfolderBase]: For 25988/25988 co-relation queries the response was YES. [2023-11-17 12:01:00,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21369 conditions, 3138 events. 1886/3138 cut-off events. For 25988/25988 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 17953 event pairs, 172 based on Foata normal form. 22/3160 useless extension candidates. Maximal degree in co-relation 20907. Up to 1515 conditions per place. [2023-11-17 12:01:00,813 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 277 selfloop transitions, 77 changer transitions 16/370 dead transitions. [2023-11-17 12:01:00,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 370 transitions, 6588 flow [2023-11-17 12:01:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:01:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:01:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2023-11-17 12:01:00,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16025641025641027 [2023-11-17 12:01:00,814 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 75 transitions. [2023-11-17 12:01:00,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 75 transitions. [2023-11-17 12:01:00,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:00,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 75 transitions. [2023-11-17 12:01:00,814 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 12:01:00,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:00,815 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 52.0) internal successors, (520), 10 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:00,815 INFO L175 Difference]: Start difference. First operand has 140 places, 287 transitions, 4665 flow. Second operand 9 states and 75 transitions. [2023-11-17 12:01:00,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 370 transitions, 6588 flow [2023-11-17 12:01:00,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 370 transitions, 6421 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-11-17 12:01:00,887 INFO L231 Difference]: Finished difference. Result has 141 places, 280 transitions, 4457 flow [2023-11-17 12:01:00,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4388, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4457, PETRI_PLACES=141, PETRI_TRANSITIONS=280} [2023-11-17 12:01:00,888 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 118 predicate places. [2023-11-17 12:01:00,888 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 280 transitions, 4457 flow [2023-11-17 12:01:00,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 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 12:01:00,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:00,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:00,896 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 12:01:01,094 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,SelfDestructingSolverStorable39 [2023-11-17 12:01:01,094 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 12:01:01,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash 279203199, now seen corresponding path program 7 times [2023-11-17 12:01:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:01,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716911696] [2023-11-17 12:01:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:01:01,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:01,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716911696] [2023-11-17 12:01:01,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716911696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:01,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448016943] [2023-11-17 12:01:01,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:01:01,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:01,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:01,251 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:01,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 12:01:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:01,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 12:01:01,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:01,391 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 16 treesize of output 5 [2023-11-17 12:01:01,396 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 12:01:01,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:01:01,416 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 12:01:01,420 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 12:01:01,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:01:01,471 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:01:01,471 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 12:01:01,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2023-11-17 12:01:01,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:01:01,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:01:01,668 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 26 treesize of output 10 [2023-11-17 12:01:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:01,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:01:01,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448016943] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:01,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:01:01,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 11] total 22 [2023-11-17 12:01:01,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505137129] [2023-11-17 12:01:01,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:01,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:01:01,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:01,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:01:01,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:01:01,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:01,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 280 transitions, 4457 flow. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:01,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:01,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:01,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:02,222 INFO L124 PetriNetUnfolderBase]: 1794/2948 cut-off events. [2023-11-17 12:01:02,223 INFO L125 PetriNetUnfolderBase]: For 23951/23951 co-relation queries the response was YES. [2023-11-17 12:01:02,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19863 conditions, 2948 events. 1794/2948 cut-off events. For 23951/23951 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 16517 event pairs, 279 based on Foata normal form. 22/2970 useless extension candidates. Maximal degree in co-relation 19449. Up to 1647 conditions per place. [2023-11-17 12:01:02,243 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 262 selfloop transitions, 57 changer transitions 15/334 dead transitions. [2023-11-17 12:01:02,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 334 transitions, 5834 flow [2023-11-17 12:01:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2023-11-17 12:01:02,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.17582417582417584 [2023-11-17 12:01:02,244 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 64 transitions. [2023-11-17 12:01:02,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 64 transitions. [2023-11-17 12:01:02,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:02,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 64 transitions. [2023-11-17 12:01:02,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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 12:01:02,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:02,245 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:02,245 INFO L175 Difference]: Start difference. First operand has 141 places, 280 transitions, 4457 flow. Second operand 7 states and 64 transitions. [2023-11-17 12:01:02,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 334 transitions, 5834 flow [2023-11-17 12:01:02,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 334 transitions, 5692 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-11-17 12:01:02,308 INFO L231 Difference]: Finished difference. Result has 141 places, 274 transitions, 4390 flow [2023-11-17 12:01:02,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4390, PETRI_PLACES=141, PETRI_TRANSITIONS=274} [2023-11-17 12:01:02,309 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 118 predicate places. [2023-11-17 12:01:02,309 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 274 transitions, 4390 flow [2023-11-17 12:01:02,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:02,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:02,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:02,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:02,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:02,513 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 12:01:02,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:02,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2062379056, now seen corresponding path program 2 times [2023-11-17 12:01:02,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:02,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372411051] [2023-11-17 12:01:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:02,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:02,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372411051] [2023-11-17 12:01:02,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372411051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:02,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752554493] [2023-11-17 12:01:02,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:02,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:02,717 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:02,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 12:01:02,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:02,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:01:02,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:03,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:03,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:03,234 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 124 treesize of output 88 [2023-11-17 12:01:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:03,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752554493] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:03,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:03,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 12:01:03,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016053187] [2023-11-17 12:01:03,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:03,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:01:03,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:01:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:01:03,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:03,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 274 transitions, 4390 flow. Second operand has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:03,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:03,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:03,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:04,722 INFO L124 PetriNetUnfolderBase]: 1811/3013 cut-off events. [2023-11-17 12:01:04,722 INFO L125 PetriNetUnfolderBase]: For 27669/27669 co-relation queries the response was YES. [2023-11-17 12:01:04,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20627 conditions, 3013 events. 1811/3013 cut-off events. For 27669/27669 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17247 event pairs, 316 based on Foata normal form. 10/3023 useless extension candidates. Maximal degree in co-relation 20584. Up to 889 conditions per place. [2023-11-17 12:01:04,740 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 206 selfloop transitions, 165 changer transitions 23/394 dead transitions. [2023-11-17 12:01:04,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 394 transitions, 6105 flow [2023-11-17 12:01:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:01:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:01:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 204 transitions. [2023-11-17 12:01:04,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.17832167832167833 [2023-11-17 12:01:04,741 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 204 transitions. [2023-11-17 12:01:04,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 204 transitions. [2023-11-17 12:01:04,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:04,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 204 transitions. [2023-11-17 12:01:04,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 9.272727272727273) internal successors, (204), 22 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:04,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 52.0) internal successors, (1196), 23 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:04,743 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 52.0) internal successors, (1196), 23 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:04,743 INFO L175 Difference]: Start difference. First operand has 141 places, 274 transitions, 4390 flow. Second operand 22 states and 204 transitions. [2023-11-17 12:01:04,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 394 transitions, 6105 flow [2023-11-17 12:01:04,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 394 transitions, 5996 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-11-17 12:01:04,817 INFO L231 Difference]: Finished difference. Result has 162 places, 293 transitions, 5002 flow [2023-11-17 12:01:04,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4302, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5002, PETRI_PLACES=162, PETRI_TRANSITIONS=293} [2023-11-17 12:01:04,817 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 139 predicate places. [2023-11-17 12:01:04,817 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 293 transitions, 5002 flow [2023-11-17 12:01:04,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:04,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:04,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:04,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:05,018 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,SelfDestructingSolverStorable41 [2023-11-17 12:01:05,018 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 12:01:05,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:05,019 INFO L85 PathProgramCache]: Analyzing trace with hash -112210702, now seen corresponding path program 3 times [2023-11-17 12:01:05,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:05,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412575969] [2023-11-17 12:01:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:05,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:05,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:05,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412575969] [2023-11-17 12:01:05,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412575969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:05,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118334793] [2023-11-17 12:01:05,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:05,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:05,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:05,226 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:05,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 12:01:05,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:05,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:05,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:01:05,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:05,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:05,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:05,720 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 124 treesize of output 88 [2023-11-17 12:01:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:06,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118334793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:06,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:06,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 12:01:06,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542611242] [2023-11-17 12:01:06,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:06,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:01:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:06,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:01:06,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:01:06,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:06,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 293 transitions, 5002 flow. Second operand has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:06,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:06,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:06,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:07,692 INFO L124 PetriNetUnfolderBase]: 1842/3071 cut-off events. [2023-11-17 12:01:07,692 INFO L125 PetriNetUnfolderBase]: For 33009/33009 co-relation queries the response was YES. [2023-11-17 12:01:07,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21848 conditions, 3071 events. 1842/3071 cut-off events. For 33009/33009 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17618 event pairs, 246 based on Foata normal form. 72/3143 useless extension candidates. Maximal degree in co-relation 21799. Up to 925 conditions per place. [2023-11-17 12:01:07,714 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 205 selfloop transitions, 197 changer transitions 28/430 dead transitions. [2023-11-17 12:01:07,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 430 transitions, 7124 flow [2023-11-17 12:01:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:01:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:01:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 228 transitions. [2023-11-17 12:01:07,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.18269230769230768 [2023-11-17 12:01:07,715 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 228 transitions. [2023-11-17 12:01:07,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 228 transitions. [2023-11-17 12:01:07,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:07,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 228 transitions. [2023-11-17 12:01:07,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 9.5) internal successors, (228), 24 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:07,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 52.0) internal successors, (1300), 25 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:07,717 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 52.0) internal successors, (1300), 25 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:07,717 INFO L175 Difference]: Start difference. First operand has 162 places, 293 transitions, 5002 flow. Second operand 24 states and 228 transitions. [2023-11-17 12:01:07,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 430 transitions, 7124 flow [2023-11-17 12:01:07,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 430 transitions, 6935 flow, removed 58 selfloop flow, removed 12 redundant places. [2023-11-17 12:01:07,852 INFO L231 Difference]: Finished difference. Result has 176 places, 310 transitions, 5707 flow [2023-11-17 12:01:07,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4845, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5707, PETRI_PLACES=176, PETRI_TRANSITIONS=310} [2023-11-17 12:01:07,852 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 153 predicate places. [2023-11-17 12:01:07,852 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 310 transitions, 5707 flow [2023-11-17 12:01:07,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:07,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:07,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:07,862 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 12:01:08,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:08,053 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 12:01:08,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash 669888163, now seen corresponding path program 4 times [2023-11-17 12:01:08,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:08,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93055999] [2023-11-17 12:01:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:08,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:08,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93055999] [2023-11-17 12:01:08,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93055999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:08,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690140960] [2023-11-17 12:01:08,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:08,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:08,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:08,303 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 12:01:08,305 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 12:01:08,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:08,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:08,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:01:08,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:08,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:08,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:08,776 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 124 treesize of output 88 [2023-11-17 12:01:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:09,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690140960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:09,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:09,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 12:01:09,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897972596] [2023-11-17 12:01:09,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:09,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:01:09,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:09,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:01:09,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:01:09,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:09,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 310 transitions, 5707 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 12:01:09,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:09,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:09,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:11,375 INFO L124 PetriNetUnfolderBase]: 2425/4040 cut-off events. [2023-11-17 12:01:11,375 INFO L125 PetriNetUnfolderBase]: For 46906/46906 co-relation queries the response was YES. [2023-11-17 12:01:11,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29337 conditions, 4040 events. 2425/4040 cut-off events. For 46906/46906 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24225 event pairs, 456 based on Foata normal form. 50/4090 useless extension candidates. Maximal degree in co-relation 29286. Up to 1201 conditions per place. [2023-11-17 12:01:11,403 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 412 selfloop transitions, 289 changer transitions 24/725 dead transitions. [2023-11-17 12:01:11,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 725 transitions, 12314 flow [2023-11-17 12:01:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 12:01:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 12:01:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 354 transitions. [2023-11-17 12:01:11,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.17455621301775148 [2023-11-17 12:01:11,405 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 354 transitions. [2023-11-17 12:01:11,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 354 transitions. [2023-11-17 12:01:11,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:11,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 354 transitions. [2023-11-17 12:01:11,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 9.076923076923077) internal successors, (354), 39 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:11,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 52.0) internal successors, (2080), 40 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:11,407 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 52.0) internal successors, (2080), 40 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:11,407 INFO L175 Difference]: Start difference. First operand has 176 places, 310 transitions, 5707 flow. Second operand 39 states and 354 transitions. [2023-11-17 12:01:11,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 725 transitions, 12314 flow [2023-11-17 12:01:11,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 725 transitions, 11700 flow, removed 55 selfloop flow, removed 18 redundant places. [2023-11-17 12:01:11,554 INFO L231 Difference]: Finished difference. Result has 213 places, 421 transitions, 8015 flow [2023-11-17 12:01:11,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5288, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8015, PETRI_PLACES=213, PETRI_TRANSITIONS=421} [2023-11-17 12:01:11,555 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 190 predicate places. [2023-11-17 12:01:11,555 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 421 transitions, 8015 flow [2023-11-17 12:01:11,555 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 12:01:11,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:11,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:11,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:11,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:11,757 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 12:01:11,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:11,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1133350483, now seen corresponding path program 1 times [2023-11-17 12:01:11,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:11,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539288388] [2023-11-17 12:01:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:11,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:01:11,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539288388] [2023-11-17 12:01:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539288388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767323161] [2023-11-17 12:01:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:11,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:11,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:12,009 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 12:01:12,025 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 12:01:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:12,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:01:12,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:01:12,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:01:12,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767323161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:12,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:12,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-11-17 12:01:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235220802] [2023-11-17 12:01:12,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:12,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:01:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:01:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:01:12,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:12,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 421 transitions, 8015 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 12:01:12,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:12,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:12,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:12,839 INFO L124 PetriNetUnfolderBase]: 1143/2062 cut-off events. [2023-11-17 12:01:12,839 INFO L125 PetriNetUnfolderBase]: For 29331/29331 co-relation queries the response was YES. [2023-11-17 12:01:12,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15756 conditions, 2062 events. 1143/2062 cut-off events. For 29331/29331 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11774 event pairs, 346 based on Foata normal form. 284/2346 useless extension candidates. Maximal degree in co-relation 15689. Up to 1122 conditions per place. [2023-11-17 12:01:12,854 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 223 selfloop transitions, 73 changer transitions 40/336 dead transitions. [2023-11-17 12:01:12,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 336 transitions, 5912 flow [2023-11-17 12:01:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:01:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:01:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 164 transitions. [2023-11-17 12:01:12,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.18552036199095023 [2023-11-17 12:01:12,856 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 164 transitions. [2023-11-17 12:01:12,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 164 transitions. [2023-11-17 12:01:12,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:12,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 164 transitions. [2023-11-17 12:01:12,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 9.647058823529411) internal successors, (164), 17 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:12,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:12,857 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:12,857 INFO L175 Difference]: Start difference. First operand has 213 places, 421 transitions, 8015 flow. Second operand 17 states and 164 transitions. [2023-11-17 12:01:12,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 336 transitions, 5912 flow [2023-11-17 12:01:12,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 336 transitions, 5571 flow, removed 77 selfloop flow, removed 25 redundant places. [2023-11-17 12:01:12,963 INFO L231 Difference]: Finished difference. Result has 203 places, 250 transitions, 4295 flow [2023-11-17 12:01:12,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4295, PETRI_PLACES=203, PETRI_TRANSITIONS=250} [2023-11-17 12:01:12,964 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 180 predicate places. [2023-11-17 12:01:12,964 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 250 transitions, 4295 flow [2023-11-17 12:01:12,964 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 12:01:12,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:12,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:12,972 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 12:01:13,165 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,SelfDestructingSolverStorable44 [2023-11-17 12:01:13,165 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 12:01:13,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:13,165 INFO L85 PathProgramCache]: Analyzing trace with hash 181015131, now seen corresponding path program 5 times [2023-11-17 12:01:13,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:13,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252322000] [2023-11-17 12:01:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:13,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:13,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:13,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252322000] [2023-11-17 12:01:13,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252322000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:13,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930749266] [2023-11-17 12:01:13,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:01:13,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:13,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:13,395 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 12:01:13,414 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 12:01:13,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:13,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:13,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 12:01:13,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:13,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:13,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:13,962 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 124 treesize of output 88 [2023-11-17 12:01:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:14,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930749266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:14,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:14,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 12:01:14,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661155763] [2023-11-17 12:01:14,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:14,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:01:14,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:01:14,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:01:14,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:14,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 250 transitions, 4295 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 12:01:14,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:14,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:14,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:15,988 INFO L124 PetriNetUnfolderBase]: 1466/2605 cut-off events. [2023-11-17 12:01:15,989 INFO L125 PetriNetUnfolderBase]: For 34253/34253 co-relation queries the response was YES. [2023-11-17 12:01:16,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19184 conditions, 2605 events. 1466/2605 cut-off events. For 34253/34253 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15058 event pairs, 334 based on Foata normal form. 2/2607 useless extension candidates. Maximal degree in co-relation 19124. Up to 697 conditions per place. [2023-11-17 12:01:16,011 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 310 selfloop transitions, 149 changer transitions 32/491 dead transitions. [2023-11-17 12:01:16,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 491 transitions, 8139 flow [2023-11-17 12:01:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:01:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:01:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 262 transitions. [2023-11-17 12:01:16,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16253101736972705 [2023-11-17 12:01:16,012 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 262 transitions. [2023-11-17 12:01:16,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 262 transitions. [2023-11-17 12:01:16,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:16,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 262 transitions. [2023-11-17 12:01:16,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 8.451612903225806) internal successors, (262), 31 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 52.0) internal successors, (1664), 32 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,015 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 52.0) internal successors, (1664), 32 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,015 INFO L175 Difference]: Start difference. First operand has 203 places, 250 transitions, 4295 flow. Second operand 31 states and 262 transitions. [2023-11-17 12:01:16,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 491 transitions, 8139 flow [2023-11-17 12:01:16,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 491 transitions, 7631 flow, removed 88 selfloop flow, removed 19 redundant places. [2023-11-17 12:01:16,173 INFO L231 Difference]: Finished difference. Result has 203 places, 274 transitions, 4692 flow [2023-11-17 12:01:16,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4692, PETRI_PLACES=203, PETRI_TRANSITIONS=274} [2023-11-17 12:01:16,174 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 180 predicate places. [2023-11-17 12:01:16,174 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 274 transitions, 4692 flow [2023-11-17 12:01:16,174 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 12:01:16,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:16,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:16,180 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 12:01:16,374 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,SelfDestructingSolverStorable45 [2023-11-17 12:01:16,375 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 12:01:16,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:16,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1933786076, now seen corresponding path program 6 times [2023-11-17 12:01:16,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:16,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614941162] [2023-11-17 12:01:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:16,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:16,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:16,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614941162] [2023-11-17 12:01:16,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614941162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:16,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668288264] [2023-11-17 12:01:16,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:16,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:16,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:16,607 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 12:01:16,610 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 12:01:16,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:01:16,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:16,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:01:16,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:16,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:16,992 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 118 treesize of output 83 [2023-11-17 12:01:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:17,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:17,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:17,076 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 124 treesize of output 88 [2023-11-17 12:01:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668288264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:17,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:17,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 12:01:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517094862] [2023-11-17 12:01:17,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:17,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:01:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:01:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:01:17,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:17,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 274 transitions, 4692 flow. Second operand has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:17,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:17,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:17,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:18,480 INFO L124 PetriNetUnfolderBase]: 1440/2563 cut-off events. [2023-11-17 12:01:18,481 INFO L125 PetriNetUnfolderBase]: For 32460/32460 co-relation queries the response was YES. [2023-11-17 12:01:18,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18391 conditions, 2563 events. 1440/2563 cut-off events. For 32460/32460 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14704 event pairs, 309 based on Foata normal form. 2/2565 useless extension candidates. Maximal degree in co-relation 18330. Up to 1125 conditions per place. [2023-11-17 12:01:18,500 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 171 selfloop transitions, 123 changer transitions 24/318 dead transitions. [2023-11-17 12:01:18,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 318 transitions, 5569 flow [2023-11-17 12:01:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:01:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:01:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 139 transitions. [2023-11-17 12:01:18,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15723981900452488 [2023-11-17 12:01:18,501 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 139 transitions. [2023-11-17 12:01:18,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 139 transitions. [2023-11-17 12:01:18,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:18,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 139 transitions. [2023-11-17 12:01:18,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.176470588235293) internal successors, (139), 17 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 12:01:18,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:18,502 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:18,502 INFO L175 Difference]: Start difference. First operand has 203 places, 274 transitions, 4692 flow. Second operand 17 states and 139 transitions. [2023-11-17 12:01:18,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 318 transitions, 5569 flow [2023-11-17 12:01:18,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 318 transitions, 5433 flow, removed 17 selfloop flow, removed 21 redundant places. [2023-11-17 12:01:18,619 INFO L231 Difference]: Finished difference. Result has 193 places, 262 transitions, 4576 flow [2023-11-17 12:01:18,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4560, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4576, PETRI_PLACES=193, PETRI_TRANSITIONS=262} [2023-11-17 12:01:18,619 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 170 predicate places. [2023-11-17 12:01:18,619 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 262 transitions, 4576 flow [2023-11-17 12:01:18,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:18,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:18,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:18,628 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 12:01:18,820 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,SelfDestructingSolverStorable46 [2023-11-17 12:01:18,820 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 12:01:18,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash 16457588, now seen corresponding path program 7 times [2023-11-17 12:01:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:18,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538561502] [2023-11-17 12:01:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:18,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:19,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538561502] [2023-11-17 12:01:19,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538561502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257561930] [2023-11-17 12:01:19,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:01:19,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:19,059 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 12:01:19,060 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 12:01:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:19,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:01:19,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:19,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:19,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:19,579 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 124 treesize of output 88 [2023-11-17 12:01:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:20,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257561930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:20,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:20,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-11-17 12:01:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700768065] [2023-11-17 12:01:20,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:20,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 12:01:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 12:01:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 12:01:20,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:20,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 262 transitions, 4576 flow. Second operand has 33 states, 33 states have (on average 4.818181818181818) internal successors, (159), 33 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 12:01:20,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:20,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:20,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:20,834 INFO L124 PetriNetUnfolderBase]: 1406/2509 cut-off events. [2023-11-17 12:01:20,834 INFO L125 PetriNetUnfolderBase]: For 34764/34764 co-relation queries the response was YES. [2023-11-17 12:01:20,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18262 conditions, 2509 events. 1406/2509 cut-off events. For 34764/34764 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14363 event pairs, 313 based on Foata normal form. 2/2511 useless extension candidates. Maximal degree in co-relation 18206. Up to 1125 conditions per place. [2023-11-17 12:01:20,856 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 161 selfloop transitions, 109 changer transitions 32/302 dead transitions. [2023-11-17 12:01:20,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 302 transitions, 5420 flow [2023-11-17 12:01:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:01:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:01:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2023-11-17 12:01:20,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15625 [2023-11-17 12:01:20,857 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 130 transitions. [2023-11-17 12:01:20,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 130 transitions. [2023-11-17 12:01:20,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:20,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 130 transitions. [2023-11-17 12:01:20,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.125) internal successors, (130), 16 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:20,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:20,859 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:20,859 INFO L175 Difference]: Start difference. First operand has 193 places, 262 transitions, 4576 flow. Second operand 16 states and 130 transitions. [2023-11-17 12:01:20,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 302 transitions, 5420 flow [2023-11-17 12:01:20,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 302 transitions, 5193 flow, removed 6 selfloop flow, removed 13 redundant places. [2023-11-17 12:01:20,980 INFO L231 Difference]: Finished difference. Result has 192 places, 243 transitions, 4243 flow [2023-11-17 12:01:20,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4243, PETRI_PLACES=192, PETRI_TRANSITIONS=243} [2023-11-17 12:01:20,980 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 169 predicate places. [2023-11-17 12:01:20,981 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 243 transitions, 4243 flow [2023-11-17 12:01:20,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.818181818181818) internal successors, (159), 33 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 12:01:20,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:20,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:20,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-17 12:01:21,181 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,SelfDestructingSolverStorable47 [2023-11-17 12:01:21,181 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 12:01:21,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:21,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2089581712, now seen corresponding path program 8 times [2023-11-17 12:01:21,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:21,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373696835] [2023-11-17 12:01:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:21,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:21,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:21,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373696835] [2023-11-17 12:01:21,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373696835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:21,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364759664] [2023-11-17 12:01:21,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:21,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:21,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:21,433 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 12:01:21,454 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 12:01:21,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:21,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:21,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:01:21,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:21,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:21,890 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 118 treesize of output 83 [2023-11-17 12:01:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:21,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:21,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:21,975 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 124 treesize of output 88 [2023-11-17 12:01:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:22,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364759664] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:22,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:22,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-11-17 12:01:22,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539870552] [2023-11-17 12:01:22,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:22,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 12:01:22,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:22,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 12:01:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 12:01:22,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:22,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 243 transitions, 4243 flow. Second operand has 33 states, 33 states have (on average 4.818181818181818) internal successors, (159), 33 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 12:01:22,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:22,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:22,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:23,602 INFO L124 PetriNetUnfolderBase]: 1354/2394 cut-off events. [2023-11-17 12:01:23,602 INFO L125 PetriNetUnfolderBase]: For 34005/34005 co-relation queries the response was YES. [2023-11-17 12:01:23,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17393 conditions, 2394 events. 1354/2394 cut-off events. For 34005/34005 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13469 event pairs, 305 based on Foata normal form. 44/2438 useless extension candidates. Maximal degree in co-relation 17337. Up to 1125 conditions per place. [2023-11-17 12:01:23,619 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 169 selfloop transitions, 128 changer transitions 11/308 dead transitions. [2023-11-17 12:01:23,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 308 transitions, 5448 flow [2023-11-17 12:01:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:01:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:01:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 165 transitions. [2023-11-17 12:01:23,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1510989010989011 [2023-11-17 12:01:23,621 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 165 transitions. [2023-11-17 12:01:23,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 165 transitions. [2023-11-17 12:01:23,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:23,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 165 transitions. [2023-11-17 12:01:23,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 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 12:01:23,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 52.0) internal successors, (1144), 22 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:23,622 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 52.0) internal successors, (1144), 22 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:23,622 INFO L175 Difference]: Start difference. First operand has 192 places, 243 transitions, 4243 flow. Second operand 21 states and 165 transitions. [2023-11-17 12:01:23,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 308 transitions, 5448 flow [2023-11-17 12:01:23,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 308 transitions, 5190 flow, removed 19 selfloop flow, removed 13 redundant places. [2023-11-17 12:01:23,724 INFO L231 Difference]: Finished difference. Result has 193 places, 258 transitions, 4537 flow [2023-11-17 12:01:23,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4003, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4537, PETRI_PLACES=193, PETRI_TRANSITIONS=258} [2023-11-17 12:01:23,724 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 170 predicate places. [2023-11-17 12:01:23,724 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 258 transitions, 4537 flow [2023-11-17 12:01:23,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.818181818181818) internal successors, (159), 33 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 12:01:23,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:23,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:23,732 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 12:01:23,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:23,928 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 12:01:23,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:23,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1320493312, now seen corresponding path program 9 times [2023-11-17 12:01:23,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:23,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516297183] [2023-11-17 12:01:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:23,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:24,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:24,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516297183] [2023-11-17 12:01:24,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516297183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:24,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294461611] [2023-11-17 12:01:24,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:24,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:24,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:24,158 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 12:01:24,178 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 12:01:24,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:24,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:24,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:01:24,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:24,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:24,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:24,770 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 124 treesize of output 88 [2023-11-17 12:01:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:25,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294461611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:25,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:25,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-11-17 12:01:25,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45666286] [2023-11-17 12:01:25,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:25,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 12:01:25,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:25,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 12:01:25,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 12:01:25,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:25,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 258 transitions, 4537 flow. Second operand has 33 states, 33 states have (on average 4.818181818181818) internal successors, (159), 33 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 12:01:25,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:25,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:25,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:26,286 INFO L124 PetriNetUnfolderBase]: 1345/2429 cut-off events. [2023-11-17 12:01:26,286 INFO L125 PetriNetUnfolderBase]: For 34000/34000 co-relation queries the response was YES. [2023-11-17 12:01:26,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17580 conditions, 2429 events. 1345/2429 cut-off events. For 34000/34000 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14125 event pairs, 305 based on Foata normal form. 4/2433 useless extension candidates. Maximal degree in co-relation 17525. Up to 1125 conditions per place. [2023-11-17 12:01:26,302 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 175 selfloop transitions, 118 changer transitions 33/326 dead transitions. [2023-11-17 12:01:26,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 326 transitions, 5636 flow [2023-11-17 12:01:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:01:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:01:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 191 transitions. [2023-11-17 12:01:26,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14692307692307693 [2023-11-17 12:01:26,303 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 191 transitions. [2023-11-17 12:01:26,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 191 transitions. [2023-11-17 12:01:26,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:26,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 191 transitions. [2023-11-17 12:01:26,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 7.64) internal successors, (191), 25 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:26,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 52.0) internal successors, (1352), 26 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:26,305 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 52.0) internal successors, (1352), 26 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:26,305 INFO L175 Difference]: Start difference. First operand has 193 places, 258 transitions, 4537 flow. Second operand 25 states and 191 transitions. [2023-11-17 12:01:26,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 326 transitions, 5636 flow [2023-11-17 12:01:26,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 326 transitions, 5224 flow, removed 79 selfloop flow, removed 12 redundant places. [2023-11-17 12:01:26,417 INFO L231 Difference]: Finished difference. Result has 207 places, 246 transitions, 4232 flow [2023-11-17 12:01:26,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4167, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4232, PETRI_PLACES=207, PETRI_TRANSITIONS=246} [2023-11-17 12:01:26,418 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 184 predicate places. [2023-11-17 12:01:26,418 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 246 transitions, 4232 flow [2023-11-17 12:01:26,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.818181818181818) internal successors, (159), 33 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 12:01:26,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:26,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:26,423 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 12:01:26,618 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,SelfDestructingSolverStorable49 [2023-11-17 12:01:26,619 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 12:01:26,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:26,619 INFO L85 PathProgramCache]: Analyzing trace with hash 668705787, now seen corresponding path program 10 times [2023-11-17 12:01:26,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:26,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545758902] [2023-11-17 12:01:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:26,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:26,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545758902] [2023-11-17 12:01:26,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545758902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:26,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645664581] [2023-11-17 12:01:26,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:26,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:26,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:26,852 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 12:01:26,853 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 12:01:26,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:26,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:26,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:01:26,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:27,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:27,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:27,334 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 124 treesize of output 88 [2023-11-17 12:01:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:27,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645664581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:27,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:27,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 12:01:27,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997289087] [2023-11-17 12:01:27,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:27,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:01:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:01:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:01:27,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:27,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 246 transitions, 4232 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 12:01:27,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:27,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:27,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:29,217 INFO L124 PetriNetUnfolderBase]: 1291/2325 cut-off events. [2023-11-17 12:01:29,217 INFO L125 PetriNetUnfolderBase]: For 31071/31071 co-relation queries the response was YES. [2023-11-17 12:01:29,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16590 conditions, 2325 events. 1291/2325 cut-off events. For 31071/31071 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13295 event pairs, 295 based on Foata normal form. 2/2327 useless extension candidates. Maximal degree in co-relation 16532. Up to 679 conditions per place. [2023-11-17 12:01:29,231 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 256 selfloop transitions, 141 changer transitions 34/431 dead transitions. [2023-11-17 12:01:29,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 431 transitions, 6945 flow [2023-11-17 12:01:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 12:01:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 12:01:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 274 transitions. [2023-11-17 12:01:29,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15967365967365968 [2023-11-17 12:01:29,232 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 274 transitions. [2023-11-17 12:01:29,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 274 transitions. [2023-11-17 12:01:29,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:29,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 274 transitions. [2023-11-17 12:01:29,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 8.303030303030303) internal successors, (274), 33 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:29,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 52.0) internal successors, (1768), 34 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:29,238 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 52.0) internal successors, (1768), 34 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:29,238 INFO L175 Difference]: Start difference. First operand has 207 places, 246 transitions, 4232 flow. Second operand 33 states and 274 transitions. [2023-11-17 12:01:29,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 431 transitions, 6945 flow [2023-11-17 12:01:29,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 431 transitions, 6665 flow, removed 12 selfloop flow, removed 21 redundant places. [2023-11-17 12:01:29,333 INFO L231 Difference]: Finished difference. Result has 214 places, 236 transitions, 4095 flow [2023-11-17 12:01:29,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4095, PETRI_PLACES=214, PETRI_TRANSITIONS=236} [2023-11-17 12:01:29,334 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 191 predicate places. [2023-11-17 12:01:29,334 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 236 transitions, 4095 flow [2023-11-17 12:01:29,334 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 12:01:29,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:29,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:29,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:29,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:29,535 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 12:01:29,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:29,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1483606351, now seen corresponding path program 11 times [2023-11-17 12:01:29,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:29,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606760991] [2023-11-17 12:01:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:29,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:29,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606760991] [2023-11-17 12:01:29,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606760991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238825631] [2023-11-17 12:01:29,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:01:29,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:29,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:29,755 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 12:01:29,755 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 12:01:29,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:01:29,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:29,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:01:29,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:30,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:30,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:30,264 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 124 treesize of output 88 [2023-11-17 12:01:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:30,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238825631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:30,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:30,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 12:01:30,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790429159] [2023-11-17 12:01:30,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:30,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:01:30,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:30,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:01:30,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:01:30,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:30,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 236 transitions, 4095 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 12:01:30,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:30,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:30,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:31,533 INFO L124 PetriNetUnfolderBase]: 1263/2270 cut-off events. [2023-11-17 12:01:31,533 INFO L125 PetriNetUnfolderBase]: For 31046/31046 co-relation queries the response was YES. [2023-11-17 12:01:31,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16218 conditions, 2270 events. 1263/2270 cut-off events. For 31046/31046 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12961 event pairs, 295 based on Foata normal form. 1/2271 useless extension candidates. Maximal degree in co-relation 16162. Up to 1045 conditions per place. [2023-11-17 12:01:31,547 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 151 selfloop transitions, 115 changer transitions 31/297 dead transitions. [2023-11-17 12:01:31,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 297 transitions, 5114 flow [2023-11-17 12:01:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:01:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:01:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 164 transitions. [2023-11-17 12:01:31,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1576923076923077 [2023-11-17 12:01:31,548 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 164 transitions. [2023-11-17 12:01:31,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 164 transitions. [2023-11-17 12:01:31,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:31,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 164 transitions. [2023-11-17 12:01:31,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.2) internal successors, (164), 20 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:31,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 52.0) internal successors, (1092), 21 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:31,550 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 52.0) internal successors, (1092), 21 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:31,550 INFO L175 Difference]: Start difference. First operand has 214 places, 236 transitions, 4095 flow. Second operand 20 states and 164 transitions. [2023-11-17 12:01:31,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 297 transitions, 5114 flow [2023-11-17 12:01:31,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 297 transitions, 4831 flow, removed 19 selfloop flow, removed 28 redundant places. [2023-11-17 12:01:31,637 INFO L231 Difference]: Finished difference. Result has 199 places, 215 transitions, 3682 flow [2023-11-17 12:01:31,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3836, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3682, PETRI_PLACES=199, PETRI_TRANSITIONS=215} [2023-11-17 12:01:31,638 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 176 predicate places. [2023-11-17 12:01:31,638 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 215 transitions, 3682 flow [2023-11-17 12:01:31,638 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 12:01:31,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:31,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:31,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:31,838 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,SelfDestructingSolverStorable51 [2023-11-17 12:01:31,838 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 12:01:31,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:31,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1080194656, now seen corresponding path program 8 times [2023-11-17 12:01:31,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:31,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96167360] [2023-11-17 12:01:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:31,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:01:31,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:31,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96167360] [2023-11-17 12:01:31,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96167360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:31,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:31,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 12:01:31,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581723325] [2023-11-17 12:01:31,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:31,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:01:31,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:01:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:01:31,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:31,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 215 transitions, 3682 flow. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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 12:01:31,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:31,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:31,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:32,335 INFO L124 PetriNetUnfolderBase]: 1179/2085 cut-off events. [2023-11-17 12:01:32,336 INFO L125 PetriNetUnfolderBase]: For 27373/27373 co-relation queries the response was YES. [2023-11-17 12:01:32,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14733 conditions, 2085 events. 1179/2085 cut-off events. For 27373/27373 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11464 event pairs, 386 based on Foata normal form. 16/2101 useless extension candidates. Maximal degree in co-relation 14679. Up to 1760 conditions per place. [2023-11-17 12:01:32,346 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 158 selfloop transitions, 52 changer transitions 12/222 dead transitions. [2023-11-17 12:01:32,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 222 transitions, 4140 flow [2023-11-17 12:01:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:01:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:01:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 64 transitions. [2023-11-17 12:01:32,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15384615384615385 [2023-11-17 12:01:32,347 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 64 transitions. [2023-11-17 12:01:32,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 64 transitions. [2023-11-17 12:01:32,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:32,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 64 transitions. [2023-11-17 12:01:32,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 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 12:01:32,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:32,348 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:32,348 INFO L175 Difference]: Start difference. First operand has 199 places, 215 transitions, 3682 flow. Second operand 8 states and 64 transitions. [2023-11-17 12:01:32,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 222 transitions, 4140 flow [2023-11-17 12:01:32,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 222 transitions, 3930 flow, removed 15 selfloop flow, removed 21 redundant places. [2023-11-17 12:01:32,423 INFO L231 Difference]: Finished difference. Result has 180 places, 206 transitions, 3399 flow [2023-11-17 12:01:32,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3399, PETRI_PLACES=180, PETRI_TRANSITIONS=206} [2023-11-17 12:01:32,424 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 157 predicate places. [2023-11-17 12:01:32,424 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 206 transitions, 3399 flow [2023-11-17 12:01:32,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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 12:01:32,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:32,424 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:32,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-11-17 12:01:32,424 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 12:01:32,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash -981714694, now seen corresponding path program 12 times [2023-11-17 12:01:32,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:32,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562455657] [2023-11-17 12:01:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:32,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:32,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:32,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562455657] [2023-11-17 12:01:32,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562455657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:32,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653044600] [2023-11-17 12:01:32,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:32,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:32,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:32,653 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 12:01:32,653 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 12:01:32,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:01:32,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:32,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:01:32,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:33,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:33,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:33,182 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 124 treesize of output 88 [2023-11-17 12:01:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:33,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653044600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:33,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:33,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 12:01:33,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619970655] [2023-11-17 12:01:33,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:33,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:01:33,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:33,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:01:33,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:01:33,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:33,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 206 transitions, 3399 flow. Second operand has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:33,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:33,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:33,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:34,192 INFO L124 PetriNetUnfolderBase]: 1150/2024 cut-off events. [2023-11-17 12:01:34,192 INFO L125 PetriNetUnfolderBase]: For 23647/23647 co-relation queries the response was YES. [2023-11-17 12:01:34,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14091 conditions, 2024 events. 1150/2024 cut-off events. For 23647/23647 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10974 event pairs, 264 based on Foata normal form. 16/2040 useless extension candidates. Maximal degree in co-relation 14043. Up to 933 conditions per place. [2023-11-17 12:01:34,209 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 132 selfloop transitions, 97 changer transitions 11/240 dead transitions. [2023-11-17 12:01:34,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 240 transitions, 4060 flow [2023-11-17 12:01:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:01:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:01:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 132 transitions. [2023-11-17 12:01:34,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1493212669683258 [2023-11-17 12:01:34,210 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 132 transitions. [2023-11-17 12:01:34,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 132 transitions. [2023-11-17 12:01:34,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:34,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 132 transitions. [2023-11-17 12:01:34,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.764705882352941) internal successors, (132), 17 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:34,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:34,211 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:34,211 INFO L175 Difference]: Start difference. First operand has 180 places, 206 transitions, 3399 flow. Second operand 17 states and 132 transitions. [2023-11-17 12:01:34,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 240 transitions, 4060 flow [2023-11-17 12:01:34,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 240 transitions, 3946 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-17 12:01:34,266 INFO L231 Difference]: Finished difference. Result has 182 places, 199 transitions, 3399 flow [2023-11-17 12:01:34,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3274, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3399, PETRI_PLACES=182, PETRI_TRANSITIONS=199} [2023-11-17 12:01:34,266 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 159 predicate places. [2023-11-17 12:01:34,266 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 199 transitions, 3399 flow [2023-11-17 12:01:34,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:34,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:34,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:34,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-17 12:01:34,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:34,467 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 12:01:34,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 819093440, now seen corresponding path program 13 times [2023-11-17 12:01:34,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:34,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777500747] [2023-11-17 12:01:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:34,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:34,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:34,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777500747] [2023-11-17 12:01:34,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777500747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:34,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14015308] [2023-11-17 12:01:34,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:01:34,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:34,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:34,690 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 12:01:34,693 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 12:01:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:34,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:01:34,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:35,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:35,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:35,152 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 124 treesize of output 88 [2023-11-17 12:01:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:35,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14015308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:35,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:35,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 12:01:35,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393724178] [2023-11-17 12:01:35,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:35,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:01:35,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:01:35,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:01:35,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:35,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 199 transitions, 3399 flow. Second operand has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:35,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:35,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:35,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:36,469 INFO L124 PetriNetUnfolderBase]: 1140/1990 cut-off events. [2023-11-17 12:01:36,469 INFO L125 PetriNetUnfolderBase]: For 24457/24457 co-relation queries the response was YES. [2023-11-17 12:01:36,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14068 conditions, 1990 events. 1140/1990 cut-off events. For 24457/24457 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10641 event pairs, 262 based on Foata normal form. 2/1992 useless extension candidates. Maximal degree in co-relation 14021. Up to 933 conditions per place. [2023-11-17 12:01:36,482 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 127 selfloop transitions, 92 changer transitions 18/237 dead transitions. [2023-11-17 12:01:36,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 237 transitions, 4041 flow [2023-11-17 12:01:36,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:01:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:01:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 134 transitions. [2023-11-17 12:01:36,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14316239316239315 [2023-11-17 12:01:36,483 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 134 transitions. [2023-11-17 12:01:36,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 134 transitions. [2023-11-17 12:01:36,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:36,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 134 transitions. [2023-11-17 12:01:36,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 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 12:01:36,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 52.0) internal successors, (988), 19 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:36,485 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 52.0) internal successors, (988), 19 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:36,485 INFO L175 Difference]: Start difference. First operand has 182 places, 199 transitions, 3399 flow. Second operand 18 states and 134 transitions. [2023-11-17 12:01:36,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 237 transitions, 4041 flow [2023-11-17 12:01:36,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 237 transitions, 3846 flow, removed 2 selfloop flow, removed 14 redundant places. [2023-11-17 12:01:36,546 INFO L231 Difference]: Finished difference. Result has 183 places, 192 transitions, 3261 flow [2023-11-17 12:01:36,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3206, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3261, PETRI_PLACES=183, PETRI_TRANSITIONS=192} [2023-11-17 12:01:36,546 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 160 predicate places. [2023-11-17 12:01:36,546 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 192 transitions, 3261 flow [2023-11-17 12:01:36,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:36,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:36,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:36,552 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 12:01:36,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:36,747 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 12:01:36,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:36,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1147245620, now seen corresponding path program 14 times [2023-11-17 12:01:36,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:36,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815244072] [2023-11-17 12:01:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:36,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:36,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:36,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815244072] [2023-11-17 12:01:36,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815244072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:36,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856545379] [2023-11-17 12:01:36,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:36,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:36,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:36,949 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 12:01:36,950 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 12:01:37,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:37,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:37,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:01:37,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:37,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:37,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:37,467 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 124 treesize of output 88 [2023-11-17 12:01:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:37,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856545379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:37,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:37,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 12:01:37,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536860696] [2023-11-17 12:01:37,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:01:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:01:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:01:37,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:37,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 192 transitions, 3261 flow. Second operand has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:37,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:37,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:37,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:38,596 INFO L124 PetriNetUnfolderBase]: 1116/1938 cut-off events. [2023-11-17 12:01:38,596 INFO L125 PetriNetUnfolderBase]: For 24092/24092 co-relation queries the response was YES. [2023-11-17 12:01:38,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13702 conditions, 1938 events. 1116/1938 cut-off events. For 24092/24092 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10185 event pairs, 262 based on Foata normal form. 2/1940 useless extension candidates. Maximal degree in co-relation 13655. Up to 933 conditions per place. [2023-11-17 12:01:38,609 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 125 selfloop transitions, 86 changer transitions 13/224 dead transitions. [2023-11-17 12:01:38,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 224 transitions, 3863 flow [2023-11-17 12:01:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:01:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:01:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 117 transitions. [2023-11-17 12:01:38,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.140625 [2023-11-17 12:01:38,610 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 117 transitions. [2023-11-17 12:01:38,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 117 transitions. [2023-11-17 12:01:38,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:38,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 117 transitions. [2023-11-17 12:01:38,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:38,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:38,611 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:38,611 INFO L175 Difference]: Start difference. First operand has 183 places, 192 transitions, 3261 flow. Second operand 16 states and 117 transitions. [2023-11-17 12:01:38,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 224 transitions, 3863 flow [2023-11-17 12:01:38,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 224 transitions, 3676 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-11-17 12:01:38,667 INFO L231 Difference]: Finished difference. Result has 178 places, 184 transitions, 3088 flow [2023-11-17 12:01:38,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3076, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3088, PETRI_PLACES=178, PETRI_TRANSITIONS=184} [2023-11-17 12:01:38,668 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 155 predicate places. [2023-11-17 12:01:38,668 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 184 transitions, 3088 flow [2023-11-17 12:01:38,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:38,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:38,668 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:38,679 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 12:01:38,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-17 12:01:38,874 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 12:01:38,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1302493618, now seen corresponding path program 15 times [2023-11-17 12:01:38,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:38,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360136973] [2023-11-17 12:01:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:38,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:39,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:39,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360136973] [2023-11-17 12:01:39,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360136973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:39,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29489340] [2023-11-17 12:01:39,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:39,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:39,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:39,075 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 12:01:39,076 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 12:01:39,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:39,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:39,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:01:39,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:39,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:39,494 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 120 treesize of output 85 [2023-11-17 12:01:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:39,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:39,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:39,576 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 124 treesize of output 88 [2023-11-17 12:01:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:40,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29489340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:40,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:40,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 12:01:40,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119195947] [2023-11-17 12:01:40,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:40,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:01:40,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:40,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:01:40,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:01:40,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:40,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 184 transitions, 3088 flow. Second operand has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:40,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:40,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:40,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:40,693 INFO L124 PetriNetUnfolderBase]: 1102/1904 cut-off events. [2023-11-17 12:01:40,693 INFO L125 PetriNetUnfolderBase]: For 23690/23690 co-relation queries the response was YES. [2023-11-17 12:01:40,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13404 conditions, 1904 events. 1102/1904 cut-off events. For 23690/23690 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9897 event pairs, 262 based on Foata normal form. 2/1906 useless extension candidates. Maximal degree in co-relation 13357. Up to 933 conditions per place. [2023-11-17 12:01:40,706 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 106 selfloop transitions, 73 changer transitions 31/210 dead transitions. [2023-11-17 12:01:40,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 210 transitions, 3646 flow [2023-11-17 12:01:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:01:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:01:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 102 transitions. [2023-11-17 12:01:40,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1401098901098901 [2023-11-17 12:01:40,707 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 102 transitions. [2023-11-17 12:01:40,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 102 transitions. [2023-11-17 12:01:40,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:40,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 102 transitions. [2023-11-17 12:01:40,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 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 12:01:40,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 52.0) internal successors, (780), 15 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:40,708 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 52.0) internal successors, (780), 15 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:40,708 INFO L175 Difference]: Start difference. First operand has 178 places, 184 transitions, 3088 flow. Second operand 14 states and 102 transitions. [2023-11-17 12:01:40,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 210 transitions, 3646 flow [2023-11-17 12:01:40,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 210 transitions, 3465 flow, removed 3 selfloop flow, removed 15 redundant places. [2023-11-17 12:01:40,768 INFO L231 Difference]: Finished difference. Result has 174 places, 168 transitions, 2848 flow [2023-11-17 12:01:40,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2848, PETRI_PLACES=174, PETRI_TRANSITIONS=168} [2023-11-17 12:01:40,768 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 151 predicate places. [2023-11-17 12:01:40,768 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 168 transitions, 2848 flow [2023-11-17 12:01:40,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 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 12:01:40,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:40,768 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:40,773 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 12:01:40,970 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,SelfDestructingSolverStorable56 [2023-11-17 12:01:40,970 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 12:01:40,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:40,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1619469582, now seen corresponding path program 9 times [2023-11-17 12:01:40,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:40,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402954383] [2023-11-17 12:01:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:40,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:01:41,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:41,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402954383] [2023-11-17 12:01:41,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402954383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:41,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710479911] [2023-11-17 12:01:41,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:41,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:41,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:41,310 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 12:01:41,311 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 12:01:41,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:41,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:41,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:01:41,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:41,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:01:41,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:01:41,583 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:01:41,583 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 23 treesize of output 21 [2023-11-17 12:01:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:01:41,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:01:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710479911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:41,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:01:41,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2023-11-17 12:01:41,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406001241] [2023-11-17 12:01:41,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:01:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:01:41,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:01:41,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:41,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 168 transitions, 2848 flow. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:41,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:41,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:41,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:41,996 INFO L124 PetriNetUnfolderBase]: 1039/1739 cut-off events. [2023-11-17 12:01:41,996 INFO L125 PetriNetUnfolderBase]: For 22643/22643 co-relation queries the response was YES. [2023-11-17 12:01:42,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12443 conditions, 1739 events. 1039/1739 cut-off events. For 22643/22643 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8635 event pairs, 316 based on Foata normal form. 16/1755 useless extension candidates. Maximal degree in co-relation 12397. Up to 1471 conditions per place. [2023-11-17 12:01:42,007 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 127 selfloop transitions, 31 changer transitions 18/176 dead transitions. [2023-11-17 12:01:42,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 176 transitions, 3218 flow [2023-11-17 12:01:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:01:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:01:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 63 transitions. [2023-11-17 12:01:42,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15144230769230768 [2023-11-17 12:01:42,008 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 63 transitions. [2023-11-17 12:01:42,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 63 transitions. [2023-11-17 12:01:42,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:42,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 63 transitions. [2023-11-17 12:01:42,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:42,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:42,009 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:42,009 INFO L175 Difference]: Start difference. First operand has 174 places, 168 transitions, 2848 flow. Second operand 8 states and 63 transitions. [2023-11-17 12:01:42,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 176 transitions, 3218 flow [2023-11-17 12:01:42,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 176 transitions, 2899 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-11-17 12:01:42,052 INFO L231 Difference]: Finished difference. Result has 139 places, 155 transitions, 2367 flow [2023-11-17 12:01:42,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2522, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2367, PETRI_PLACES=139, PETRI_TRANSITIONS=155} [2023-11-17 12:01:42,053 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 116 predicate places. [2023-11-17 12:01:42,053 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 155 transitions, 2367 flow [2023-11-17 12:01:42,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:42,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:42,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:42,060 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 12:01:42,253 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,SelfDestructingSolverStorable57 [2023-11-17 12:01:42,253 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 12:01:42,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:42,254 INFO L85 PathProgramCache]: Analyzing trace with hash -590705589, now seen corresponding path program 16 times [2023-11-17 12:01:42,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:42,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247286994] [2023-11-17 12:01:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:42,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:42,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:42,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247286994] [2023-11-17 12:01:42,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247286994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:42,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475766850] [2023-11-17 12:01:42,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:42,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:42,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:42,464 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 12:01:42,465 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 12:01:42,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:42,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:42,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 12:01:42,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:42,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:43,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:43,015 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 124 treesize of output 88 [2023-11-17 12:01:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:43,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475766850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:43,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:43,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 12:01:43,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925032822] [2023-11-17 12:01:43,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:43,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:01:43,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:43,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:01:43,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:01:43,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:43,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 155 transitions, 2367 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 12:01:43,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:43,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:43,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:44,363 INFO L124 PetriNetUnfolderBase]: 994/1651 cut-off events. [2023-11-17 12:01:44,364 INFO L125 PetriNetUnfolderBase]: For 15506/15506 co-relation queries the response was YES. [2023-11-17 12:01:44,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11442 conditions, 1651 events. 994/1651 cut-off events. For 15506/15506 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8019 event pairs, 213 based on Foata normal form. 26/1677 useless extension candidates. Maximal degree in co-relation 11401. Up to 503 conditions per place. [2023-11-17 12:01:44,375 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 175 selfloop transitions, 96 changer transitions 18/289 dead transitions. [2023-11-17 12:01:44,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 289 transitions, 4292 flow [2023-11-17 12:01:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:01:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:01:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 231 transitions. [2023-11-17 12:01:44,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15318302387267904 [2023-11-17 12:01:44,376 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 231 transitions. [2023-11-17 12:01:44,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 231 transitions. [2023-11-17 12:01:44,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:44,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 231 transitions. [2023-11-17 12:01:44,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 7.9655172413793105) internal successors, (231), 29 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:44,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 52.0) internal successors, (1560), 30 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:44,378 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 52.0) internal successors, (1560), 30 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:44,378 INFO L175 Difference]: Start difference. First operand has 139 places, 155 transitions, 2367 flow. Second operand 29 states and 231 transitions. [2023-11-17 12:01:44,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 289 transitions, 4292 flow [2023-11-17 12:01:44,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 289 transitions, 4056 flow, removed 34 selfloop flow, removed 11 redundant places. [2023-11-17 12:01:44,407 INFO L231 Difference]: Finished difference. Result has 159 places, 165 transitions, 2575 flow [2023-11-17 12:01:44,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2575, PETRI_PLACES=159, PETRI_TRANSITIONS=165} [2023-11-17 12:01:44,407 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 136 predicate places. [2023-11-17 12:01:44,408 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 165 transitions, 2575 flow [2023-11-17 12:01:44,408 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 12:01:44,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:44,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:44,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:44,613 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,SelfDestructingSolverStorable58 [2023-11-17 12:01:44,613 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 12:01:44,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:44,613 INFO L85 PathProgramCache]: Analyzing trace with hash 319903143, now seen corresponding path program 17 times [2023-11-17 12:01:44,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:44,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652287658] [2023-11-17 12:01:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:44,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:44,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:44,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652287658] [2023-11-17 12:01:44,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652287658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:44,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415817341] [2023-11-17 12:01:44,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:01:44,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:44,828 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 12:01:44,830 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 12:01:44,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:44,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:44,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:01:44,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:45,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:45,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:45,374 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 124 treesize of output 88 [2023-11-17 12:01:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:45,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415817341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:45,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:45,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 12:01:45,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545912409] [2023-11-17 12:01:45,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:45,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:01:45,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:45,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:01:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:01:45,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:45,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 165 transitions, 2575 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 12:01:45,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:45,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:45,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:46,885 INFO L124 PetriNetUnfolderBase]: 997/1664 cut-off events. [2023-11-17 12:01:46,885 INFO L125 PetriNetUnfolderBase]: For 17150/17150 co-relation queries the response was YES. [2023-11-17 12:01:46,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12127 conditions, 1664 events. 997/1664 cut-off events. For 17150/17150 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8177 event pairs, 213 based on Foata normal form. 2/1666 useless extension candidates. Maximal degree in co-relation 12079. Up to 503 conditions per place. [2023-11-17 12:01:46,895 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 180 selfloop transitions, 101 changer transitions 17/298 dead transitions. [2023-11-17 12:01:46,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 298 transitions, 4447 flow [2023-11-17 12:01:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:01:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:01:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 245 transitions. [2023-11-17 12:01:46,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.151985111662531 [2023-11-17 12:01:46,896 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 245 transitions. [2023-11-17 12:01:46,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 245 transitions. [2023-11-17 12:01:46,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:46,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 245 transitions. [2023-11-17 12:01:46,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 7.903225806451613) internal successors, (245), 31 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:46,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 52.0) internal successors, (1664), 32 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:46,898 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 52.0) internal successors, (1664), 32 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:46,898 INFO L175 Difference]: Start difference. First operand has 159 places, 165 transitions, 2575 flow. Second operand 31 states and 245 transitions. [2023-11-17 12:01:46,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 298 transitions, 4447 flow [2023-11-17 12:01:46,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 298 transitions, 4239 flow, removed 37 selfloop flow, removed 19 redundant places. [2023-11-17 12:01:46,931 INFO L231 Difference]: Finished difference. Result has 169 places, 168 transitions, 2661 flow [2023-11-17 12:01:46,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2403, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2661, PETRI_PLACES=169, PETRI_TRANSITIONS=168} [2023-11-17 12:01:46,932 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 146 predicate places. [2023-11-17 12:01:46,932 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 168 transitions, 2661 flow [2023-11-17 12:01:46,933 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 12:01:46,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:46,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:46,938 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 12:01:47,138 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,SelfDestructingSolverStorable59 [2023-11-17 12:01:47,138 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 12:01:47,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1525324915, now seen corresponding path program 18 times [2023-11-17 12:01:47,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:47,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378635770] [2023-11-17 12:01:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:47,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:47,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:47,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378635770] [2023-11-17 12:01:47,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378635770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:47,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957276561] [2023-11-17 12:01:47,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:47,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:47,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:47,357 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 12:01:47,357 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 12:01:47,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:01:47,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:47,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 12:01:47,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:47,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:47,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:47,852 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 124 treesize of output 88 [2023-11-17 12:01:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:48,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957276561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:48,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:48,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 12:01:48,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456630116] [2023-11-17 12:01:48,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:48,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:01:48,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:48,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:01:48,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:01:48,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:48,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 168 transitions, 2661 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 12:01:48,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:48,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:48,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:49,512 INFO L124 PetriNetUnfolderBase]: 986/1639 cut-off events. [2023-11-17 12:01:49,512 INFO L125 PetriNetUnfolderBase]: For 16818/16818 co-relation queries the response was YES. [2023-11-17 12:01:49,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11987 conditions, 1639 events. 986/1639 cut-off events. For 16818/16818 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7991 event pairs, 213 based on Foata normal form. 2/1641 useless extension candidates. Maximal degree in co-relation 11940. Up to 503 conditions per place. [2023-11-17 12:01:49,522 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 168 selfloop transitions, 93 changer transitions 26/287 dead transitions. [2023-11-17 12:01:49,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 287 transitions, 4287 flow [2023-11-17 12:01:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:01:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:01:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 234 transitions. [2023-11-17 12:01:49,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15 [2023-11-17 12:01:49,524 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 234 transitions. [2023-11-17 12:01:49,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 234 transitions. [2023-11-17 12:01:49,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:49,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 234 transitions. [2023-11-17 12:01:49,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 7.8) internal successors, (234), 30 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:49,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 52.0) internal successors, (1612), 31 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:49,525 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 52.0) internal successors, (1612), 31 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:49,525 INFO L175 Difference]: Start difference. First operand has 169 places, 168 transitions, 2661 flow. Second operand 30 states and 234 transitions. [2023-11-17 12:01:49,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 287 transitions, 4287 flow [2023-11-17 12:01:49,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 287 transitions, 4094 flow, removed 10 selfloop flow, removed 25 redundant places. [2023-11-17 12:01:49,583 INFO L231 Difference]: Finished difference. Result has 172 places, 159 transitions, 2504 flow [2023-11-17 12:01:49,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2476, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2504, PETRI_PLACES=172, PETRI_TRANSITIONS=159} [2023-11-17 12:01:49,584 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 149 predicate places. [2023-11-17 12:01:49,584 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 159 transitions, 2504 flow [2023-11-17 12:01:49,584 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 12:01:49,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:49,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:49,589 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 12:01:49,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:49,787 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 12:01:49,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:49,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1698572607, now seen corresponding path program 19 times [2023-11-17 12:01:49,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:49,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748274369] [2023-11-17 12:01:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:49,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:50,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748274369] [2023-11-17 12:01:50,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748274369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:50,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675592605] [2023-11-17 12:01:50,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:01:50,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:50,009 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 12:01:50,009 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 12:01:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:50,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:01:50,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:50,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:50,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:50,510 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 124 treesize of output 88 [2023-11-17 12:01:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:51,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675592605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:51,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:51,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 12:01:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153852237] [2023-11-17 12:01:51,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:51,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:01:51,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:01:51,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:01:51,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:51,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 159 transitions, 2504 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 12:01:51,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:51,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:51,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:52,146 INFO L124 PetriNetUnfolderBase]: 976/1617 cut-off events. [2023-11-17 12:01:52,146 INFO L125 PetriNetUnfolderBase]: For 16480/16480 co-relation queries the response was YES. [2023-11-17 12:01:52,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11877 conditions, 1617 events. 976/1617 cut-off events. For 16480/16480 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7816 event pairs, 213 based on Foata normal form. 2/1619 useless extension candidates. Maximal degree in co-relation 11832. Up to 503 conditions per place. [2023-11-17 12:01:52,156 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 168 selfloop transitions, 93 changer transitions 18/279 dead transitions. [2023-11-17 12:01:52,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 279 transitions, 4115 flow [2023-11-17 12:01:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:01:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:01:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 228 transitions. [2023-11-17 12:01:52,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14615384615384616 [2023-11-17 12:01:52,163 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 228 transitions. [2023-11-17 12:01:52,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 228 transitions. [2023-11-17 12:01:52,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:52,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 228 transitions. [2023-11-17 12:01:52,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 7.6) internal successors, (228), 30 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:52,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 52.0) internal successors, (1612), 31 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:52,164 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 52.0) internal successors, (1612), 31 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:52,165 INFO L175 Difference]: Start difference. First operand has 172 places, 159 transitions, 2504 flow. Second operand 30 states and 228 transitions. [2023-11-17 12:01:52,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 279 transitions, 4115 flow [2023-11-17 12:01:52,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 279 transitions, 3924 flow, removed 14 selfloop flow, removed 23 redundant places. [2023-11-17 12:01:52,193 INFO L231 Difference]: Finished difference. Result has 170 places, 157 transitions, 2472 flow [2023-11-17 12:01:52,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2472, PETRI_PLACES=170, PETRI_TRANSITIONS=157} [2023-11-17 12:01:52,194 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 147 predicate places. [2023-11-17 12:01:52,194 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 157 transitions, 2472 flow [2023-11-17 12:01:52,194 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 12:01:52,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:52,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:52,200 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 12:01:52,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:52,395 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 12:01:52,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2008725093, now seen corresponding path program 20 times [2023-11-17 12:01:52,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:52,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131543084] [2023-11-17 12:01:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:52,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:52,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:52,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131543084] [2023-11-17 12:01:52,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131543084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:52,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466677926] [2023-11-17 12:01:52,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:52,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:52,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:52,619 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 12:01:52,620 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 12:01:52,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:52,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:52,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:01:52,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:53,111 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:53,112 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 120 treesize of output 85 [2023-11-17 12:01:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:53,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:53,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:53,196 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 124 treesize of output 88 [2023-11-17 12:01:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466677926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:53,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:53,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 12:01:53,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350805515] [2023-11-17 12:01:53,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:53,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:01:53,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:01:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:01:53,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:53,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 157 transitions, 2472 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 12:01:53,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:53,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:53,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:54,459 INFO L124 PetriNetUnfolderBase]: 967/1595 cut-off events. [2023-11-17 12:01:54,459 INFO L125 PetriNetUnfolderBase]: For 16249/16249 co-relation queries the response was YES. [2023-11-17 12:01:54,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11809 conditions, 1595 events. 967/1595 cut-off events. For 16249/16249 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7578 event pairs, 209 based on Foata normal form. 1/1596 useless extension candidates. Maximal degree in co-relation 11764. Up to 753 conditions per place. [2023-11-17 12:01:54,470 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 95 selfloop transitions, 80 changer transitions 15/190 dead transitions. [2023-11-17 12:01:54,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 190 transitions, 3007 flow [2023-11-17 12:01:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:01:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:01:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 122 transitions. [2023-11-17 12:01:54,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13800904977375567 [2023-11-17 12:01:54,471 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 122 transitions. [2023-11-17 12:01:54,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 122 transitions. [2023-11-17 12:01:54,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:54,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 122 transitions. [2023-11-17 12:01:54,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.176470588235294) internal successors, (122), 17 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,472 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,472 INFO L175 Difference]: Start difference. First operand has 170 places, 157 transitions, 2472 flow. Second operand 17 states and 122 transitions. [2023-11-17 12:01:54,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 190 transitions, 3007 flow [2023-11-17 12:01:54,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 190 transitions, 2830 flow, removed 4 selfloop flow, removed 27 redundant places. [2023-11-17 12:01:54,502 INFO L231 Difference]: Finished difference. Result has 156 places, 152 transitions, 2381 flow [2023-11-17 12:01:54,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2381, PETRI_PLACES=156, PETRI_TRANSITIONS=152} [2023-11-17 12:01:54,502 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 133 predicate places. [2023-11-17 12:01:54,502 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 152 transitions, 2381 flow [2023-11-17 12:01:54,502 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 12:01:54,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:54,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:54,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:54,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:54,709 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 12:01:54,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:54,709 INFO L85 PathProgramCache]: Analyzing trace with hash -696163637, now seen corresponding path program 21 times [2023-11-17 12:01:54,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:54,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767699092] [2023-11-17 12:01:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:54,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:54,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:54,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767699092] [2023-11-17 12:01:54,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767699092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:54,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152552258] [2023-11-17 12:01:54,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:54,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:54,926 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 12:01:54,927 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 12:01:55,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:01:55,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:55,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:01:55,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:55,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:55,464 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 116 treesize of output 81 [2023-11-17 12:01:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:55,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:55,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:55,634 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 124 treesize of output 88 [2023-11-17 12:01:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:56,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152552258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:56,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:56,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 12:01:56,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893523467] [2023-11-17 12:01:56,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:56,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:01:56,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:56,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:01:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:01:56,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:56,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 152 transitions, 2381 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 12:01:56,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:56,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:56,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:56,683 INFO L124 PetriNetUnfolderBase]: 952/1558 cut-off events. [2023-11-17 12:01:56,683 INFO L125 PetriNetUnfolderBase]: For 16074/16074 co-relation queries the response was YES. [2023-11-17 12:01:56,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11656 conditions, 1558 events. 952/1558 cut-off events. For 16074/16074 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7233 event pairs, 209 based on Foata normal form. 1/1559 useless extension candidates. Maximal degree in co-relation 11612. Up to 753 conditions per place. [2023-11-17 12:01:56,693 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 78 selfloop transitions, 66 changer transitions 31/175 dead transitions. [2023-11-17 12:01:56,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 175 transitions, 2858 flow [2023-11-17 12:01:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:01:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:01:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 103 transitions. [2023-11-17 12:01:56,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13205128205128205 [2023-11-17 12:01:56,694 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 103 transitions. [2023-11-17 12:01:56,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 103 transitions. [2023-11-17 12:01:56,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:56,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 103 transitions. [2023-11-17 12:01:56,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:56,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:56,695 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:56,695 INFO L175 Difference]: Start difference. First operand has 156 places, 152 transitions, 2381 flow. Second operand 15 states and 103 transitions. [2023-11-17 12:01:56,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 175 transitions, 2858 flow [2023-11-17 12:01:56,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 175 transitions, 2745 flow, removed 7 selfloop flow, removed 15 redundant places. [2023-11-17 12:01:56,723 INFO L231 Difference]: Finished difference. Result has 150 places, 133 transitions, 2096 flow [2023-11-17 12:01:56,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2096, PETRI_PLACES=150, PETRI_TRANSITIONS=133} [2023-11-17 12:01:56,724 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 127 predicate places. [2023-11-17 12:01:56,724 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 133 transitions, 2096 flow [2023-11-17 12:01:56,724 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 12:01:56,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:56,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:56,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-17 12:01:56,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:56,925 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 12:01:56,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:56,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1834538723, now seen corresponding path program 22 times [2023-11-17 12:01:56,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:56,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887389452] [2023-11-17 12:01:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:56,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:57,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887389452] [2023-11-17 12:01:57,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887389452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:57,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231994603] [2023-11-17 12:01:57,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:57,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:57,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:57,056 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 12:01:57,057 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 12:01:57,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:57,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:57,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:01:57,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:57,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:57,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231994603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:57,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:57,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-11-17 12:01:57,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972857315] [2023-11-17 12:01:57,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:57,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:01:57,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:57,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:01:57,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:01:57,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:57,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 133 transitions, 2096 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 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 12:01:57,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:57,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:57,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:57,729 INFO L124 PetriNetUnfolderBase]: 858/1421 cut-off events. [2023-11-17 12:01:57,729 INFO L125 PetriNetUnfolderBase]: For 15036/15036 co-relation queries the response was YES. [2023-11-17 12:01:57,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10251 conditions, 1421 events. 858/1421 cut-off events. For 15036/15036 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6724 event pairs, 173 based on Foata normal form. 69/1490 useless extension candidates. Maximal degree in co-relation 10210. Up to 792 conditions per place. [2023-11-17 12:01:57,737 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 87 selfloop transitions, 58 changer transitions 0/145 dead transitions. [2023-11-17 12:01:57,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 145 transitions, 2402 flow [2023-11-17 12:01:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:01:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:01:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 84 transitions. [2023-11-17 12:01:57,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1346153846153846 [2023-11-17 12:01:57,737 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 84 transitions. [2023-11-17 12:01:57,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 84 transitions. [2023-11-17 12:01:57,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:57,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 84 transitions. [2023-11-17 12:01:57,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:57,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 52.0) internal successors, (676), 13 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:57,738 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 52.0) internal successors, (676), 13 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:57,738 INFO L175 Difference]: Start difference. First operand has 150 places, 133 transitions, 2096 flow. Second operand 12 states and 84 transitions. [2023-11-17 12:01:57,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 145 transitions, 2402 flow [2023-11-17 12:01:57,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 145 transitions, 2267 flow, removed 33 selfloop flow, removed 18 redundant places. [2023-11-17 12:01:57,758 INFO L231 Difference]: Finished difference. Result has 115 places, 120 transitions, 1854 flow [2023-11-17 12:01:57,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1854, PETRI_PLACES=115, PETRI_TRANSITIONS=120} [2023-11-17 12:01:57,759 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 92 predicate places. [2023-11-17 12:01:57,759 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 120 transitions, 1854 flow [2023-11-17 12:01:57,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 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 12:01:57,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:57,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:57,764 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 12:01:57,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-11-17 12:01:57,960 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 12:01:57,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:57,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1461953502, now seen corresponding path program 2 times [2023-11-17 12:01:57,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:57,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029213264] [2023-11-17 12:01:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:57,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:58,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:58,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029213264] [2023-11-17 12:01:58,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029213264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:58,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777090282] [2023-11-17 12:01:58,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:58,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:58,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:58,446 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 12:01:58,446 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 12:01:58,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:58,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:58,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 12:01:58,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:58,941 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:01:58,942 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 93 treesize of output 52 [2023-11-17 12:01:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:58,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:59,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:59,183 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 130 [2023-11-17 12:01:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:01:59,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777090282] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:59,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:59,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 36 [2023-11-17 12:01:59,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381824928] [2023-11-17 12:01:59,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:59,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 12:01:59,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:59,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 12:01:59,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2023-11-17 12:01:59,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:01:59,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 120 transitions, 1854 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 12:01:59,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:59,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:01:59,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:00,491 INFO L124 PetriNetUnfolderBase]: 1068/1730 cut-off events. [2023-11-17 12:02:00,491 INFO L125 PetriNetUnfolderBase]: For 14933/14933 co-relation queries the response was YES. [2023-11-17 12:02:00,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12598 conditions, 1730 events. 1068/1730 cut-off events. For 14933/14933 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8254 event pairs, 207 based on Foata normal form. 3/1733 useless extension candidates. Maximal degree in co-relation 12567. Up to 1020 conditions per place. [2023-11-17 12:02:00,503 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 98 selfloop transitions, 87 changer transitions 5/190 dead transitions. [2023-11-17 12:02:00,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 190 transitions, 3198 flow [2023-11-17 12:02:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:02:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:02:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 139 transitions. [2023-11-17 12:02:00,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14068825910931174 [2023-11-17 12:02:00,504 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 139 transitions. [2023-11-17 12:02:00,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 139 transitions. [2023-11-17 12:02:00,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:00,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 139 transitions. [2023-11-17 12:02:00,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 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 12:02:00,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:00,505 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:00,505 INFO L175 Difference]: Start difference. First operand has 115 places, 120 transitions, 1854 flow. Second operand 19 states and 139 transitions. [2023-11-17 12:02:00,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 190 transitions, 3198 flow [2023-11-17 12:02:00,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 190 transitions, 3126 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-17 12:02:00,527 INFO L231 Difference]: Finished difference. Result has 129 places, 159 transitions, 2836 flow [2023-11-17 12:02:00,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2836, PETRI_PLACES=129, PETRI_TRANSITIONS=159} [2023-11-17 12:02:00,527 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 106 predicate places. [2023-11-17 12:02:00,527 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 159 transitions, 2836 flow [2023-11-17 12:02:00,527 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 12:02:00,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:00,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:00,533 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 12:02:00,733 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,SelfDestructingSolverStorable65 [2023-11-17 12:02:00,734 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 12:02:00,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:00,734 INFO L85 PathProgramCache]: Analyzing trace with hash 337654843, now seen corresponding path program 23 times [2023-11-17 12:02:00,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:00,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269153060] [2023-11-17 12:02:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:00,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:01,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:01,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269153060] [2023-11-17 12:02:01,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269153060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:01,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275647382] [2023-11-17 12:02:01,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:02:01,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:01,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:01,329 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 12:02:01,330 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 12:02:01,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:01,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 12:02:01,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:02:01,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:01,799 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2023-11-17 12:02:01,799 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 43 treesize of output 63 [2023-11-17 12:02:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:02:01,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275647382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:01,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:01,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 7] total 28 [2023-11-17 12:02:01,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621123338] [2023-11-17 12:02:01,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:01,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:02:01,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:02:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:02:01,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:01,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 159 transitions, 2836 flow. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:01,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:01,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:01,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:02,516 INFO L124 PetriNetUnfolderBase]: 1365/2195 cut-off events. [2023-11-17 12:02:02,516 INFO L125 PetriNetUnfolderBase]: For 22511/22511 co-relation queries the response was YES. [2023-11-17 12:02:02,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17201 conditions, 2195 events. 1365/2195 cut-off events. For 22511/22511 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10981 event pairs, 193 based on Foata normal form. 36/2231 useless extension candidates. Maximal degree in co-relation 17165. Up to 852 conditions per place. [2023-11-17 12:02:02,533 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 178 selfloop transitions, 63 changer transitions 0/241 dead transitions. [2023-11-17 12:02:02,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 241 transitions, 4615 flow [2023-11-17 12:02:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:02:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:02:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 114 transitions. [2023-11-17 12:02:02,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1565934065934066 [2023-11-17 12:02:02,534 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 114 transitions. [2023-11-17 12:02:02,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 114 transitions. [2023-11-17 12:02:02,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:02,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 114 transitions. [2023-11-17 12:02:02,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.142857142857142) internal successors, (114), 14 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 12:02:02,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 52.0) internal successors, (780), 15 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:02,535 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 52.0) internal successors, (780), 15 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:02,535 INFO L175 Difference]: Start difference. First operand has 129 places, 159 transitions, 2836 flow. Second operand 14 states and 114 transitions. [2023-11-17 12:02:02,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 241 transitions, 4615 flow [2023-11-17 12:02:02,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 241 transitions, 4419 flow, removed 56 selfloop flow, removed 12 redundant places. [2023-11-17 12:02:02,581 INFO L231 Difference]: Finished difference. Result has 132 places, 167 transitions, 2905 flow [2023-11-17 12:02:02,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2905, PETRI_PLACES=132, PETRI_TRANSITIONS=167} [2023-11-17 12:02:02,581 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 109 predicate places. [2023-11-17 12:02:02,581 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 167 transitions, 2905 flow [2023-11-17 12:02:02,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:02,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:02,581 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:02,587 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 12:02:02,786 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,SelfDestructingSolverStorable66 [2023-11-17 12:02:02,787 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 12:02:02,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1663539113, now seen corresponding path program 24 times [2023-11-17 12:02:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482708060] [2023-11-17 12:02:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:02,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:03,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482708060] [2023-11-17 12:02:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482708060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113156352] [2023-11-17 12:02:03,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:02:03,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:03,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:03,148 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 12:02:03,149 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 12:02:03,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:02:03,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:03,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:02:03,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:02:03,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:03,547 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 12:02:03,547 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 51 treesize of output 84 [2023-11-17 12:02:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:02:03,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113156352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:03,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:03,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 31 [2023-11-17 12:02:03,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256619051] [2023-11-17 12:02:03,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:03,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:02:03,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:03,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:02:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:02:03,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:03,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 167 transitions, 2905 flow. Second operand has 32 states, 32 states have (on average 4.6875) internal successors, (150), 32 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 12:02:03,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:03,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:03,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:04,257 INFO L124 PetriNetUnfolderBase]: 1377/2231 cut-off events. [2023-11-17 12:02:04,258 INFO L125 PetriNetUnfolderBase]: For 25726/25726 co-relation queries the response was YES. [2023-11-17 12:02:04,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17569 conditions, 2231 events. 1377/2231 cut-off events. For 25726/25726 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11319 event pairs, 361 based on Foata normal form. 12/2243 useless extension candidates. Maximal degree in co-relation 17531. Up to 1674 conditions per place. [2023-11-17 12:02:04,271 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 118 selfloop transitions, 67 changer transitions 0/185 dead transitions. [2023-11-17 12:02:04,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 185 transitions, 3449 flow [2023-11-17 12:02:04,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:02:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:02:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 104 transitions. [2023-11-17 12:02:04,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13333333333333333 [2023-11-17 12:02:04,272 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 104 transitions. [2023-11-17 12:02:04,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 104 transitions. [2023-11-17 12:02:04,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:04,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 104 transitions. [2023-11-17 12:02:04,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 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 12:02:04,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:04,273 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:04,273 INFO L175 Difference]: Start difference. First operand has 132 places, 167 transitions, 2905 flow. Second operand 15 states and 104 transitions. [2023-11-17 12:02:04,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 185 transitions, 3449 flow [2023-11-17 12:02:04,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 185 transitions, 3327 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-11-17 12:02:04,312 INFO L231 Difference]: Finished difference. Result has 136 places, 169 transitions, 2954 flow [2023-11-17 12:02:04,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2954, PETRI_PLACES=136, PETRI_TRANSITIONS=169} [2023-11-17 12:02:04,312 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 113 predicate places. [2023-11-17 12:02:04,312 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 169 transitions, 2954 flow [2023-11-17 12:02:04,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.6875) internal successors, (150), 32 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 12:02:04,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:04,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:04,318 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 12:02:04,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:04,513 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 12:02:04,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:04,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1094383454, now seen corresponding path program 3 times [2023-11-17 12:02:04,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:04,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400995735] [2023-11-17 12:02:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:04,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:05,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:05,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400995735] [2023-11-17 12:02:05,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400995735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:05,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216786711] [2023-11-17 12:02:05,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:02:05,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:05,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:05,521 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 12:02:05,552 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 12:02:05,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:02:05,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:05,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 12:02:05,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:05,736 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 42 treesize of output 38 [2023-11-17 12:02:06,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:02:06,174 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:02:06,174 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 94 treesize of output 84 [2023-11-17 12:02:06,675 INFO L349 Elim1Store]: treesize reduction 108, result has 25.5 percent of original size [2023-11-17 12:02:06,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 170 treesize of output 146 [2023-11-17 12:02:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:02:06,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:07,826 INFO L349 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2023-11-17 12:02:07,827 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 352 treesize of output 289 [2023-11-17 12:02:07,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:07,847 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 228 treesize of output 221 [2023-11-17 12:02:07,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:07,860 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 212 treesize of output 189 [2023-11-17 12:02:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:02:09,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216786711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:09,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:09,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 40 [2023-11-17 12:02:09,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937613254] [2023-11-17 12:02:09,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:09,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:02:09,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:09,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:02:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1569, Unknown=1, NotChecked=0, Total=1722 [2023-11-17 12:02:09,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:09,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 169 transitions, 2954 flow. Second operand has 42 states, 42 states have (on average 4.476190476190476) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:09,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:09,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:09,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:14,898 INFO L124 PetriNetUnfolderBase]: 3038/4864 cut-off events. [2023-11-17 12:02:14,898 INFO L125 PetriNetUnfolderBase]: For 51121/51121 co-relation queries the response was YES. [2023-11-17 12:02:14,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37541 conditions, 4864 events. 3038/4864 cut-off events. For 51121/51121 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28594 event pairs, 156 based on Foata normal form. 45/4909 useless extension candidates. Maximal degree in co-relation 37503. Up to 1483 conditions per place. [2023-11-17 12:02:14,929 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 235 selfloop transitions, 333 changer transitions 45/613 dead transitions. [2023-11-17 12:02:14,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 613 transitions, 10823 flow [2023-11-17 12:02:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-17 12:02:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-17 12:02:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 424 transitions. [2023-11-17 12:02:14,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14825174825174825 [2023-11-17 12:02:14,931 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 424 transitions. [2023-11-17 12:02:14,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 424 transitions. [2023-11-17 12:02:14,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:14,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 424 transitions. [2023-11-17 12:02:14,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 7.709090909090909) internal successors, (424), 55 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:14,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 52.0) internal successors, (2912), 56 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:14,934 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 52.0) internal successors, (2912), 56 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:14,934 INFO L175 Difference]: Start difference. First operand has 136 places, 169 transitions, 2954 flow. Second operand 55 states and 424 transitions. [2023-11-17 12:02:14,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 613 transitions, 10823 flow [2023-11-17 12:02:15,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 613 transitions, 10602 flow, removed 8 selfloop flow, removed 12 redundant places. [2023-11-17 12:02:15,039 INFO L231 Difference]: Finished difference. Result has 204 places, 406 transitions, 8821 flow [2023-11-17 12:02:15,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=8821, PETRI_PLACES=204, PETRI_TRANSITIONS=406} [2023-11-17 12:02:15,040 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 181 predicate places. [2023-11-17 12:02:15,040 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 406 transitions, 8821 flow [2023-11-17 12:02:15,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.476190476190476) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:15,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:15,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:15,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-11-17 12:02:15,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:15,245 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 12:02:15,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash -763929158, now seen corresponding path program 4 times [2023-11-17 12:02:15,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:15,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310636962] [2023-11-17 12:02:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:15,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:15,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310636962] [2023-11-17 12:02:15,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310636962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299728491] [2023-11-17 12:02:15,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:02:15,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:15,722 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 12:02:15,746 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 12:02:15,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:02:15,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:15,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:02:15,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:16,196 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:02:16,197 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 93 treesize of output 52 [2023-11-17 12:02:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:02:16,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:16,490 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:02:16,490 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 86 [2023-11-17 12:02:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:02:16,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299728491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:16,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:16,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 31 [2023-11-17 12:02:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664565246] [2023-11-17 12:02:16,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:16,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:02:16,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:02:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:02:16,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:16,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 406 transitions, 8821 flow. Second operand has 32 states, 32 states have (on average 4.84375) internal successors, (155), 32 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 12:02:16,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:16,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:16,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:18,922 INFO L124 PetriNetUnfolderBase]: 2925/4618 cut-off events. [2023-11-17 12:02:18,922 INFO L125 PetriNetUnfolderBase]: For 83594/83594 co-relation queries the response was YES. [2023-11-17 12:02:18,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43503 conditions, 4618 events. 2925/4618 cut-off events. For 83594/83594 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 26002 event pairs, 507 based on Foata normal form. 214/4832 useless extension candidates. Maximal degree in co-relation 43439. Up to 2586 conditions per place. [2023-11-17 12:02:18,961 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 291 selfloop transitions, 246 changer transitions 39/576 dead transitions. [2023-11-17 12:02:18,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 576 transitions, 12481 flow [2023-11-17 12:02:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 12:02:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 12:02:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 326 transitions. [2023-11-17 12:02:18,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14248251748251747 [2023-11-17 12:02:18,962 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 326 transitions. [2023-11-17 12:02:18,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 326 transitions. [2023-11-17 12:02:18,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:18,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 326 transitions. [2023-11-17 12:02:18,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 7.409090909090909) internal successors, (326), 44 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:18,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 52.0) internal successors, (2340), 45 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:18,964 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 52.0) internal successors, (2340), 45 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:18,964 INFO L175 Difference]: Start difference. First operand has 204 places, 406 transitions, 8821 flow. Second operand 44 states and 326 transitions. [2023-11-17 12:02:18,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 576 transitions, 12481 flow [2023-11-17 12:02:19,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 576 transitions, 11260 flow, removed 359 selfloop flow, removed 25 redundant places. [2023-11-17 12:02:19,310 INFO L231 Difference]: Finished difference. Result has 222 places, 467 transitions, 9920 flow [2023-11-17 12:02:19,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=6861, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9920, PETRI_PLACES=222, PETRI_TRANSITIONS=467} [2023-11-17 12:02:19,311 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 199 predicate places. [2023-11-17 12:02:19,311 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 467 transitions, 9920 flow [2023-11-17 12:02:19,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.84375) internal successors, (155), 32 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 12:02:19,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:19,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:19,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:19,517 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,SelfDestructingSolverStorable69 [2023-11-17 12:02:19,517 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 12:02:19,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash 309967230, now seen corresponding path program 5 times [2023-11-17 12:02:19,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:19,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784981627] [2023-11-17 12:02:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:19,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:20,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:20,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784981627] [2023-11-17 12:02:20,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784981627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:20,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176690714] [2023-11-17 12:02:20,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:02:20,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:20,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:20,300 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 12:02:20,321 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 12:02:20,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:20,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:20,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-17 12:02:20,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:20,911 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:02:20,912 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 83 treesize of output 47 [2023-11-17 12:02:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:20,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:21,365 INFO L349 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2023-11-17 12:02:21,366 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 123 treesize of output 96 [2023-11-17 12:02:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:21,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176690714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:21,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:21,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 39 [2023-11-17 12:02:21,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556527734] [2023-11-17 12:02:21,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:21,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 12:02:21,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:21,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 12:02:21,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1379, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 12:02:21,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:21,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 467 transitions, 9920 flow. Second operand has 41 states, 41 states have (on average 4.536585365853658) internal successors, (186), 41 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:21,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:21,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:21,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:23,572 INFO L124 PetriNetUnfolderBase]: 3013/4793 cut-off events. [2023-11-17 12:02:23,572 INFO L125 PetriNetUnfolderBase]: For 81236/81236 co-relation queries the response was YES. [2023-11-17 12:02:23,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43865 conditions, 4793 events. 3013/4793 cut-off events. For 81236/81236 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27990 event pairs, 419 based on Foata normal form. 30/4823 useless extension candidates. Maximal degree in co-relation 43800. Up to 3146 conditions per place. [2023-11-17 12:02:23,622 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 329 selfloop transitions, 236 changer transitions 29/594 dead transitions. [2023-11-17 12:02:23,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 594 transitions, 13208 flow [2023-11-17 12:02:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:02:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:02:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 164 transitions. [2023-11-17 12:02:23,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14335664335664336 [2023-11-17 12:02:23,624 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 164 transitions. [2023-11-17 12:02:23,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 164 transitions. [2023-11-17 12:02:23,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:23,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 164 transitions. [2023-11-17 12:02:23,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.454545454545454) internal successors, (164), 22 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 52.0) internal successors, (1196), 23 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,625 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 52.0) internal successors, (1196), 23 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,625 INFO L175 Difference]: Start difference. First operand has 222 places, 467 transitions, 9920 flow. Second operand 22 states and 164 transitions. [2023-11-17 12:02:23,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 594 transitions, 13208 flow [2023-11-17 12:02:23,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 594 transitions, 12264 flow, removed 265 selfloop flow, removed 23 redundant places. [2023-11-17 12:02:23,973 INFO L231 Difference]: Finished difference. Result has 222 places, 525 transitions, 10931 flow [2023-11-17 12:02:23,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=9108, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10931, PETRI_PLACES=222, PETRI_TRANSITIONS=525} [2023-11-17 12:02:23,974 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 199 predicate places. [2023-11-17 12:02:23,974 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 525 transitions, 10931 flow [2023-11-17 12:02:23,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.536585365853658) internal successors, (186), 41 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:23,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:23,983 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 12:02:24,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:24,181 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 12:02:24,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:24,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1466153991, now seen corresponding path program 25 times [2023-11-17 12:02:24,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:24,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593902822] [2023-11-17 12:02:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:24,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:24,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:24,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593902822] [2023-11-17 12:02:24,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593902822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:24,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841585815] [2023-11-17 12:02:24,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:02:24,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:24,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:24,574 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 12:02:24,601 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 12:02:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:24,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:02:24,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:25,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:25,138 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 12:02:25,139 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 53 treesize of output 90 [2023-11-17 12:02:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:25,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841585815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:25,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:25,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 36 [2023-11-17 12:02:25,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176342177] [2023-11-17 12:02:25,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:25,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 12:02:25,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:25,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 12:02:25,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2023-11-17 12:02:25,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:25,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 525 transitions, 10931 flow. Second operand has 37 states, 37 states have (on average 4.675675675675675) internal successors, (173), 37 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 12:02:25,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:25,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:25,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:26,641 INFO L124 PetriNetUnfolderBase]: 3082/4836 cut-off events. [2023-11-17 12:02:26,642 INFO L125 PetriNetUnfolderBase]: For 87850/87850 co-relation queries the response was YES. [2023-11-17 12:02:26,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44558 conditions, 4836 events. 3082/4836 cut-off events. For 87850/87850 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27353 event pairs, 593 based on Foata normal form. 64/4900 useless extension candidates. Maximal degree in co-relation 44491. Up to 3502 conditions per place. [2023-11-17 12:02:26,694 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 427 selfloop transitions, 143 changer transitions 0/570 dead transitions. [2023-11-17 12:02:26,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 570 transitions, 12855 flow [2023-11-17 12:02:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:02:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:02:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 105 transitions. [2023-11-17 12:02:26,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14423076923076922 [2023-11-17 12:02:26,695 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 105 transitions. [2023-11-17 12:02:26,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 105 transitions. [2023-11-17 12:02:26,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:26,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 105 transitions. [2023-11-17 12:02:26,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:26,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 52.0) internal successors, (780), 15 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:26,697 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 52.0) internal successors, (780), 15 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:26,697 INFO L175 Difference]: Start difference. First operand has 222 places, 525 transitions, 10931 flow. Second operand 14 states and 105 transitions. [2023-11-17 12:02:26,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 570 transitions, 12855 flow [2023-11-17 12:02:27,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 570 transitions, 12569 flow, removed 30 selfloop flow, removed 13 redundant places. [2023-11-17 12:02:27,062 INFO L231 Difference]: Finished difference. Result has 220 places, 527 transitions, 11027 flow [2023-11-17 12:02:27,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10663, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11027, PETRI_PLACES=220, PETRI_TRANSITIONS=527} [2023-11-17 12:02:27,063 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 197 predicate places. [2023-11-17 12:02:27,063 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 527 transitions, 11027 flow [2023-11-17 12:02:27,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.675675675675675) internal successors, (173), 37 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 12:02:27,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:27,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:27,069 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 12:02:27,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:27,264 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 12:02:27,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash 660322577, now seen corresponding path program 26 times [2023-11-17 12:02:27,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:27,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402535014] [2023-11-17 12:02:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:27,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:27,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402535014] [2023-11-17 12:02:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402535014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275149273] [2023-11-17 12:02:27,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:02:27,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:27,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:27,681 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 12:02:27,708 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 12:02:27,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:27,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:27,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 12:02:27,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:28,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:28,278 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 12:02:28,279 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 51 treesize of output 84 [2023-11-17 12:02:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:28,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275149273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:28,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:28,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 35 [2023-11-17 12:02:28,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132989975] [2023-11-17 12:02:28,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:28,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 12:02:28,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:28,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 12:02:28,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2023-11-17 12:02:28,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:28,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 527 transitions, 11027 flow. Second operand has 36 states, 36 states have (on average 4.722222222222222) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:28,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:28,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:28,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:29,864 INFO L124 PetriNetUnfolderBase]: 2971/4701 cut-off events. [2023-11-17 12:02:29,864 INFO L125 PetriNetUnfolderBase]: For 87560/87560 co-relation queries the response was YES. [2023-11-17 12:02:29,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42896 conditions, 4701 events. 2971/4701 cut-off events. For 87560/87560 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26704 event pairs, 573 based on Foata normal form. 76/4777 useless extension candidates. Maximal degree in co-relation 42831. Up to 3435 conditions per place. [2023-11-17 12:02:29,914 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 379 selfloop transitions, 157 changer transitions 0/536 dead transitions. [2023-11-17 12:02:29,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 536 transitions, 12007 flow [2023-11-17 12:02:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:02:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:02:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 127 transitions. [2023-11-17 12:02:29,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1436651583710407 [2023-11-17 12:02:29,915 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 127 transitions. [2023-11-17 12:02:29,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 127 transitions. [2023-11-17 12:02:29,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:29,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 127 transitions. [2023-11-17 12:02:29,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 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 12:02:29,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:29,916 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:29,916 INFO L175 Difference]: Start difference. First operand has 220 places, 527 transitions, 11027 flow. Second operand 17 states and 127 transitions. [2023-11-17 12:02:29,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 536 transitions, 12007 flow [2023-11-17 12:02:30,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 536 transitions, 11638 flow, removed 29 selfloop flow, removed 14 redundant places. [2023-11-17 12:02:30,275 INFO L231 Difference]: Finished difference. Result has 221 places, 507 transitions, 10614 flow [2023-11-17 12:02:30,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10255, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10614, PETRI_PLACES=221, PETRI_TRANSITIONS=507} [2023-11-17 12:02:30,276 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 198 predicate places. [2023-11-17 12:02:30,276 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 507 transitions, 10614 flow [2023-11-17 12:02:30,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.722222222222222) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:30,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:30,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:30,284 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 12:02:30,476 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,SelfDestructingSolverStorable72 [2023-11-17 12:02:30,477 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 12:02:30,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1393555714, now seen corresponding path program 6 times [2023-11-17 12:02:30,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:30,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173885146] [2023-11-17 12:02:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:30,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:31,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173885146] [2023-11-17 12:02:31,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173885146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982200549] [2023-11-17 12:02:31,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:02:31,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:31,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:31,238 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 12:02:31,238 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 12:02:31,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:02:31,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:31,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 12:02:31,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:31,836 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:02:31,836 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 93 treesize of output 52 [2023-11-17 12:02:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:31,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:32,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:32,139 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 140 treesize of output 136 [2023-11-17 12:02:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:02:32,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982200549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:32,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:32,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 40 [2023-11-17 12:02:32,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783566920] [2023-11-17 12:02:32,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:32,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 12:02:32,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:32,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 12:02:32,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 12:02:32,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:32,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 507 transitions, 10614 flow. Second operand has 41 states, 41 states have (on average 4.536585365853658) internal successors, (186), 41 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:32,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:32,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:32,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:35,101 INFO L124 PetriNetUnfolderBase]: 3337/5404 cut-off events. [2023-11-17 12:02:35,102 INFO L125 PetriNetUnfolderBase]: For 98049/98049 co-relation queries the response was YES. [2023-11-17 12:02:35,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49027 conditions, 5404 events. 3337/5404 cut-off events. For 98049/98049 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 32896 event pairs, 608 based on Foata normal form. 30/5434 useless extension candidates. Maximal degree in co-relation 48964. Up to 3389 conditions per place. [2023-11-17 12:02:35,153 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 434 selfloop transitions, 270 changer transitions 37/741 dead transitions. [2023-11-17 12:02:35,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 741 transitions, 15947 flow [2023-11-17 12:02:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:02:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:02:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 269 transitions. [2023-11-17 12:02:35,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14369658119658119 [2023-11-17 12:02:35,154 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 269 transitions. [2023-11-17 12:02:35,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 269 transitions. [2023-11-17 12:02:35,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:35,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 269 transitions. [2023-11-17 12:02:35,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 7.472222222222222) internal successors, (269), 36 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:35,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 52.0) internal successors, (1924), 37 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:35,156 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 52.0) internal successors, (1924), 37 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:35,156 INFO L175 Difference]: Start difference. First operand has 221 places, 507 transitions, 10614 flow. Second operand 36 states and 269 transitions. [2023-11-17 12:02:35,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 741 transitions, 15947 flow [2023-11-17 12:02:35,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 741 transitions, 15477 flow, removed 26 selfloop flow, removed 15 redundant places. [2023-11-17 12:02:35,525 INFO L231 Difference]: Finished difference. Result has 251 places, 608 transitions, 13310 flow [2023-11-17 12:02:35,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10280, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13310, PETRI_PLACES=251, PETRI_TRANSITIONS=608} [2023-11-17 12:02:35,525 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 228 predicate places. [2023-11-17 12:02:35,525 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 608 transitions, 13310 flow [2023-11-17 12:02:35,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.536585365853658) internal successors, (186), 41 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:35,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:35,526 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:35,532 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 12:02:35,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:35,726 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 12:02:35,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:35,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1108652510, now seen corresponding path program 7 times [2023-11-17 12:02:35,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:35,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304910342] [2023-11-17 12:02:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:35,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:36,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:36,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304910342] [2023-11-17 12:02:36,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304910342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:36,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201021446] [2023-11-17 12:02:36,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:02:36,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:36,570 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 12:02:36,571 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 12:02:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:36,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:02:36,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:37,110 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:02:37,110 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 93 treesize of output 52 [2023-11-17 12:02:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:37,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:37,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:37,336 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 130 [2023-11-17 12:02:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:37,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201021446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:37,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:37,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 39 [2023-11-17 12:02:37,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535568494] [2023-11-17 12:02:37,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:37,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 12:02:37,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:37,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 12:02:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 12:02:37,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:37,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 608 transitions, 13310 flow. Second operand has 41 states, 41 states have (on average 4.560975609756097) internal successors, (187), 41 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:37,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:37,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:37,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:39,804 INFO L124 PetriNetUnfolderBase]: 3529/5656 cut-off events. [2023-11-17 12:02:39,804 INFO L125 PetriNetUnfolderBase]: For 116943/116943 co-relation queries the response was YES. [2023-11-17 12:02:39,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53188 conditions, 5656 events. 3529/5656 cut-off events. For 116943/116943 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33864 event pairs, 825 based on Foata normal form. 18/5674 useless extension candidates. Maximal degree in co-relation 53115. Up to 3348 conditions per place. [2023-11-17 12:02:39,850 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 593 selfloop transitions, 143 changer transitions 16/752 dead transitions. [2023-11-17 12:02:39,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 752 transitions, 17187 flow [2023-11-17 12:02:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:02:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:02:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 224 transitions. [2023-11-17 12:02:39,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13895781637717122 [2023-11-17 12:02:39,851 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 224 transitions. [2023-11-17 12:02:39,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 224 transitions. [2023-11-17 12:02:39,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:39,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 224 transitions. [2023-11-17 12:02:39,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 7.225806451612903) internal successors, (224), 31 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:39,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 52.0) internal successors, (1664), 32 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:39,853 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 52.0) internal successors, (1664), 32 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:39,853 INFO L175 Difference]: Start difference. First operand has 251 places, 608 transitions, 13310 flow. Second operand 31 states and 224 transitions. [2023-11-17 12:02:39,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 752 transitions, 17187 flow [2023-11-17 12:02:40,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 752 transitions, 16923 flow, removed 98 selfloop flow, removed 18 redundant places. [2023-11-17 12:02:40,400 INFO L231 Difference]: Finished difference. Result has 270 places, 675 transitions, 15322 flow [2023-11-17 12:02:40,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=13104, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=15322, PETRI_PLACES=270, PETRI_TRANSITIONS=675} [2023-11-17 12:02:40,401 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 247 predicate places. [2023-11-17 12:02:40,401 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 675 transitions, 15322 flow [2023-11-17 12:02:40,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.560975609756097) internal successors, (187), 41 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:40,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:40,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:40,409 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 12:02:40,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-11-17 12:02:40,602 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 12:02:40,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:40,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1327601459, now seen corresponding path program 27 times [2023-11-17 12:02:40,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:40,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386215758] [2023-11-17 12:02:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:40,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:41,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:41,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386215758] [2023-11-17 12:02:41,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386215758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:41,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742429070] [2023-11-17 12:02:41,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:02:41,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:41,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:41,329 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 12:02:41,330 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 12:02:41,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:02:41,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:41,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:02:41,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:41,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:02:41,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:02:41,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:02:41,911 INFO L349 Elim1Store]: treesize reduction 48, result has 15.8 percent of original size [2023-11-17 12:02:41,911 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 28 treesize of output 16 [2023-11-17 12:02:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:02:41,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:42,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:42,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 74 [2023-11-17 12:02:42,941 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 12:02:42,942 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 796 treesize of output 720 [2023-11-17 12:02:42,956 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:02:42,959 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:02:42,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:42,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 676 treesize of output 544 [2023-11-17 12:02:42,988 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:02:42,992 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:02:43,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:43,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 500 treesize of output 456 [2023-11-17 12:02:43,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:43,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-11-17 12:02:43,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:43,962 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 726 treesize of output 642 [2023-11-17 12:02:43,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:43,976 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 310 treesize of output 255 [2023-11-17 12:02:43,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:43,986 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 246 treesize of output 223 [2023-11-17 12:02:44,077 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:02:44,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 1 [2023-11-17 12:02:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:02:44,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742429070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:44,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:44,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2023-11-17 12:02:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404919303] [2023-11-17 12:02:44,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:44,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 12:02:44,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 12:02:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1281, Unknown=31, NotChecked=0, Total=1482 [2023-11-17 12:02:44,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:44,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 675 transitions, 15322 flow. Second operand has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 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 12:02:44,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:44,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:44,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:47,008 INFO L124 PetriNetUnfolderBase]: 3702/5993 cut-off events. [2023-11-17 12:02:47,009 INFO L125 PetriNetUnfolderBase]: For 126530/126530 co-relation queries the response was YES. [2023-11-17 12:02:47,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57494 conditions, 5993 events. 3702/5993 cut-off events. For 126530/126530 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 37079 event pairs, 501 based on Foata normal form. 18/6011 useless extension candidates. Maximal degree in co-relation 57414. Up to 2325 conditions per place. [2023-11-17 12:02:47,065 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 452 selfloop transitions, 379 changer transitions 2/833 dead transitions. [2023-11-17 12:02:47,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 833 transitions, 19566 flow [2023-11-17 12:02:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 12:02:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 12:02:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 233 transitions. [2023-11-17 12:02:47,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14002403846153846 [2023-11-17 12:02:47,067 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 233 transitions. [2023-11-17 12:02:47,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 233 transitions. [2023-11-17 12:02:47,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:47,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 233 transitions. [2023-11-17 12:02:47,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 7.28125) internal successors, (233), 32 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:47,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 52.0) internal successors, (1716), 33 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:47,068 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 52.0) internal successors, (1716), 33 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:47,068 INFO L175 Difference]: Start difference. First operand has 270 places, 675 transitions, 15322 flow. Second operand 32 states and 233 transitions. [2023-11-17 12:02:47,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 833 transitions, 19566 flow [2023-11-17 12:02:47,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 833 transitions, 18968 flow, removed 253 selfloop flow, removed 18 redundant places. [2023-11-17 12:02:47,666 INFO L231 Difference]: Finished difference. Result has 288 places, 741 transitions, 17351 flow [2023-11-17 12:02:47,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=14821, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17351, PETRI_PLACES=288, PETRI_TRANSITIONS=741} [2023-11-17 12:02:47,666 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 265 predicate places. [2023-11-17 12:02:47,666 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 741 transitions, 17351 flow [2023-11-17 12:02:47,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 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 12:02:47,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:47,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:47,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-11-17 12:02:47,867 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,SelfDestructingSolverStorable75 [2023-11-17 12:02:47,867 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 12:02:47,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash 772015530, now seen corresponding path program 8 times [2023-11-17 12:02:47,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:47,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704759891] [2023-11-17 12:02:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:47,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:48,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:48,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704759891] [2023-11-17 12:02:48,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704759891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:48,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432499073] [2023-11-17 12:02:48,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:02:48,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:48,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:48,390 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 12:02:48,391 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 12:02:48,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:48,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:48,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:02:48,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:49,022 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:02:49,022 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 93 treesize of output 52 [2023-11-17 12:02:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:02:49,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:49,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:49,313 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 178 treesize of output 176 [2023-11-17 12:02:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:02:50,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432499073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:50,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:50,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 36 [2023-11-17 12:02:50,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787248053] [2023-11-17 12:02:50,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:50,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 12:02:50,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:50,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 12:02:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2023-11-17 12:02:50,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:50,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 741 transitions, 17351 flow. Second operand has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 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 12:02:50,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:50,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:50,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:51,866 INFO L124 PetriNetUnfolderBase]: 3699/6026 cut-off events. [2023-11-17 12:02:51,866 INFO L125 PetriNetUnfolderBase]: For 124021/124021 co-relation queries the response was YES. [2023-11-17 12:02:51,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59272 conditions, 6026 events. 3699/6026 cut-off events. For 124021/124021 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 37440 event pairs, 786 based on Foata normal form. 6/6032 useless extension candidates. Maximal degree in co-relation 59187. Up to 4481 conditions per place. [2023-11-17 12:02:51,930 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 587 selfloop transitions, 162 changer transitions 19/768 dead transitions. [2023-11-17 12:02:51,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 768 transitions, 19074 flow [2023-11-17 12:02:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:02:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:02:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 110 transitions. [2023-11-17 12:02:51,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1244343891402715 [2023-11-17 12:02:51,933 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 110 transitions. [2023-11-17 12:02:51,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 110 transitions. [2023-11-17 12:02:51,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:51,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 110 transitions. [2023-11-17 12:02:51,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:51,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:51,934 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:51,934 INFO L175 Difference]: Start difference. First operand has 288 places, 741 transitions, 17351 flow. Second operand 17 states and 110 transitions. [2023-11-17 12:02:51,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 768 transitions, 19074 flow [2023-11-17 12:02:52,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 768 transitions, 18563 flow, removed 111 selfloop flow, removed 16 redundant places. [2023-11-17 12:02:52,666 INFO L231 Difference]: Finished difference. Result has 290 places, 732 transitions, 16981 flow [2023-11-17 12:02:52,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=16846, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=16981, PETRI_PLACES=290, PETRI_TRANSITIONS=732} [2023-11-17 12:02:52,666 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 267 predicate places. [2023-11-17 12:02:52,666 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 732 transitions, 16981 flow [2023-11-17 12:02:52,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 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 12:02:52,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:52,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:52,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-11-17 12:02:52,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:52,872 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 12:02:52,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:52,873 INFO L85 PathProgramCache]: Analyzing trace with hash -348029381, now seen corresponding path program 28 times [2023-11-17 12:02:52,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:52,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835943883] [2023-11-17 12:02:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:52,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:53,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:53,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835943883] [2023-11-17 12:02:53,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835943883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:53,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613749370] [2023-11-17 12:02:53,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:02:53,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:53,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:53,248 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 12:02:53,249 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 12:02:53,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:02:53,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:53,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:02:53,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:02:53,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:53,666 INFO L349 Elim1Store]: treesize reduction 26, result has 68.7 percent of original size [2023-11-17 12:02:53,667 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 53 treesize of output 75 [2023-11-17 12:02:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:02:53,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613749370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:53,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:53,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 27 [2023-11-17 12:02:53,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763385752] [2023-11-17 12:02:53,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:53,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:02:53,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:53,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:02:53,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:02:53,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:53,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 732 transitions, 16981 flow. Second operand has 27 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:53,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:53,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:53,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:55,772 INFO L124 PetriNetUnfolderBase]: 4107/6602 cut-off events. [2023-11-17 12:02:55,772 INFO L125 PetriNetUnfolderBase]: For 146012/146012 co-relation queries the response was YES. [2023-11-17 12:02:55,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64401 conditions, 6602 events. 4107/6602 cut-off events. For 146012/146012 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 40713 event pairs, 941 based on Foata normal form. 108/6710 useless extension candidates. Maximal degree in co-relation 64315. Up to 5618 conditions per place. [2023-11-17 12:02:55,866 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 707 selfloop transitions, 167 changer transitions 0/874 dead transitions. [2023-11-17 12:02:55,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 874 transitions, 21674 flow [2023-11-17 12:02:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:02:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:02:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 143 transitions. [2023-11-17 12:02:55,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1527777777777778 [2023-11-17 12:02:55,867 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 143 transitions. [2023-11-17 12:02:55,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 143 transitions. [2023-11-17 12:02:55,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:55,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 143 transitions. [2023-11-17 12:02:55,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:55,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 52.0) internal successors, (988), 19 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:55,868 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 52.0) internal successors, (988), 19 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:55,868 INFO L175 Difference]: Start difference. First operand has 290 places, 732 transitions, 16981 flow. Second operand 18 states and 143 transitions. [2023-11-17 12:02:55,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 874 transitions, 21674 flow [2023-11-17 12:02:56,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 874 transitions, 21178 flow, removed 27 selfloop flow, removed 16 redundant places. [2023-11-17 12:02:56,549 INFO L231 Difference]: Finished difference. Result has 291 places, 807 transitions, 18891 flow [2023-11-17 12:02:56,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=16536, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18891, PETRI_PLACES=291, PETRI_TRANSITIONS=807} [2023-11-17 12:02:56,550 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 268 predicate places. [2023-11-17 12:02:56,550 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 807 transitions, 18891 flow [2023-11-17 12:02:56,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:56,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:56,550 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:56,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:56,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:56,753 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 12:02:56,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:56,754 INFO L85 PathProgramCache]: Analyzing trace with hash -324807360, now seen corresponding path program 9 times [2023-11-17 12:02:56,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:56,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448318970] [2023-11-17 12:02:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:56,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:57,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448318970] [2023-11-17 12:02:57,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448318970] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933210636] [2023-11-17 12:02:57,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:02:57,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:57,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:57,300 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 12:02:57,301 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 12:02:57,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:02:57,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:57,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 12:02:57,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:57,826 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:02:57,826 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 93 treesize of output 52 [2023-11-17 12:02:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:57,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:58,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:02:58,153 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 140 treesize of output 136 [2023-11-17 12:02:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933210636] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:58,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:58,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 37 [2023-11-17 12:02:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326305449] [2023-11-17 12:02:58,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:58,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 12:02:58,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 12:02:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2023-11-17 12:02:58,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:02:58,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 807 transitions, 18891 flow. Second operand has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 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 12:02:58,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:58,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:02:58,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:00,849 INFO L124 PetriNetUnfolderBase]: 4143/6692 cut-off events. [2023-11-17 12:03:00,849 INFO L125 PetriNetUnfolderBase]: For 144562/144562 co-relation queries the response was YES. [2023-11-17 12:03:00,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65702 conditions, 6692 events. 4143/6692 cut-off events. For 144562/144562 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 41958 event pairs, 1037 based on Foata normal form. 6/6698 useless extension candidates. Maximal degree in co-relation 65616. Up to 6110 conditions per place. [2023-11-17 12:03:00,920 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 724 selfloop transitions, 120 changer transitions 6/850 dead transitions. [2023-11-17 12:03:00,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 850 transitions, 21282 flow [2023-11-17 12:03:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:03:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:03:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 117 transitions. [2023-11-17 12:03:00,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1323529411764706 [2023-11-17 12:03:00,921 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 117 transitions. [2023-11-17 12:03:00,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 117 transitions. [2023-11-17 12:03:00,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:00,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 117 transitions. [2023-11-17 12:03:00,922 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 12:03:00,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:00,922 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:00,922 INFO L175 Difference]: Start difference. First operand has 291 places, 807 transitions, 18891 flow. Second operand 17 states and 117 transitions. [2023-11-17 12:03:00,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 850 transitions, 21282 flow [2023-11-17 12:03:01,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 850 transitions, 20961 flow, removed 109 selfloop flow, removed 10 redundant places. [2023-11-17 12:03:01,770 INFO L231 Difference]: Finished difference. Result has 300 places, 823 transitions, 19379 flow [2023-11-17 12:03:01,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=18612, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19379, PETRI_PLACES=300, PETRI_TRANSITIONS=823} [2023-11-17 12:03:01,771 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 277 predicate places. [2023-11-17 12:03:01,771 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 823 transitions, 19379 flow [2023-11-17 12:03:01,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 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 12:03:01,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:01,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:01,780 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 12:03:01,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-11-17 12:03:01,972 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 12:03:01,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash 414610494, now seen corresponding path program 10 times [2023-11-17 12:03:01,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:01,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651280985] [2023-11-17 12:03:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:01,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:02,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:02,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651280985] [2023-11-17 12:03:02,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651280985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:02,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766942441] [2023-11-17 12:03:02,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:03:02,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:02,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:02,456 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 12:03:02,457 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 12:03:02,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:03:02,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:02,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 12:03:02,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:02,927 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:03:02,927 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 93 treesize of output 52 [2023-11-17 12:03:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:03:02,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:03,273 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:03:03,273 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 86 [2023-11-17 12:03:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:03:03,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766942441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:03,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:03,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 30 [2023-11-17 12:03:03,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925631084] [2023-11-17 12:03:03,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:03,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 12:03:03,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:03,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 12:03:03,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2023-11-17 12:03:03,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:03:03,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 823 transitions, 19379 flow. Second operand has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 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 12:03:03,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:03,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:03:03,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:06,169 INFO L124 PetriNetUnfolderBase]: 4524/7319 cut-off events. [2023-11-17 12:03:06,169 INFO L125 PetriNetUnfolderBase]: For 167486/167486 co-relation queries the response was YES. [2023-11-17 12:03:06,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73011 conditions, 7319 events. 4524/7319 cut-off events. For 167486/167486 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 46598 event pairs, 1081 based on Foata normal form. 18/7337 useless extension candidates. Maximal degree in co-relation 72922. Up to 6446 conditions per place. [2023-11-17 12:03:06,253 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 730 selfloop transitions, 225 changer transitions 33/988 dead transitions. [2023-11-17 12:03:06,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 988 transitions, 25479 flow [2023-11-17 12:03:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:03:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:03:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 171 transitions. [2023-11-17 12:03:06,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13701923076923078 [2023-11-17 12:03:06,254 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 171 transitions. [2023-11-17 12:03:06,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 171 transitions. [2023-11-17 12:03:06,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:06,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 171 transitions. [2023-11-17 12:03:06,255 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 12:03:06,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 52.0) internal successors, (1300), 25 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:06,256 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 52.0) internal successors, (1300), 25 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:06,256 INFO L175 Difference]: Start difference. First operand has 300 places, 823 transitions, 19379 flow. Second operand 24 states and 171 transitions. [2023-11-17 12:03:06,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 988 transitions, 25479 flow [2023-11-17 12:03:07,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 988 transitions, 25128 flow, removed 71 selfloop flow, removed 13 redundant places. [2023-11-17 12:03:07,182 INFO L231 Difference]: Finished difference. Result has 319 places, 933 transitions, 23133 flow [2023-11-17 12:03:07,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=19028, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=23133, PETRI_PLACES=319, PETRI_TRANSITIONS=933} [2023-11-17 12:03:07,183 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 296 predicate places. [2023-11-17 12:03:07,183 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 933 transitions, 23133 flow [2023-11-17 12:03:07,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 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 12:03:07,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:07,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:07,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:07,383 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,SelfDestructingSolverStorable79 [2023-11-17 12:03:07,384 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 12:03:07,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:07,384 INFO L85 PathProgramCache]: Analyzing trace with hash -45769437, now seen corresponding path program 29 times [2023-11-17 12:03:07,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:07,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52466637] [2023-11-17 12:03:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:07,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:07,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:07,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52466637] [2023-11-17 12:03:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52466637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:07,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267851875] [2023-11-17 12:03:07,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:03:07,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:07,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:07,884 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 12:03:07,884 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 12:03:08,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:03:08,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:08,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:03:08,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:03:08,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:08,330 INFO L349 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-11-17 12:03:08,330 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 51 treesize of output 71 [2023-11-17 12:03:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:03:08,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267851875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:08,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:08,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 6] total 26 [2023-11-17 12:03:08,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380834828] [2023-11-17 12:03:08,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:08,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:03:08,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:08,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:03:08,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:03:08,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:03:08,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 933 transitions, 23133 flow. Second operand has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 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 12:03:08,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:08,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:03:08,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:11,182 INFO L124 PetriNetUnfolderBase]: 4455/7136 cut-off events. [2023-11-17 12:03:11,182 INFO L125 PetriNetUnfolderBase]: For 186334/186334 co-relation queries the response was YES. [2023-11-17 12:03:11,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73750 conditions, 7136 events. 4455/7136 cut-off events. For 186334/186334 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 44486 event pairs, 1043 based on Foata normal form. 78/7214 useless extension candidates. Maximal degree in co-relation 73652. Up to 6314 conditions per place. [2023-11-17 12:03:11,256 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 756 selfloop transitions, 187 changer transitions 0/943 dead transitions. [2023-11-17 12:03:11,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 943 transitions, 24878 flow [2023-11-17 12:03:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:03:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:03:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 132 transitions. [2023-11-17 12:03:11,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14102564102564102 [2023-11-17 12:03:11,257 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 132 transitions. [2023-11-17 12:03:11,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 132 transitions. [2023-11-17 12:03:11,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:11,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 132 transitions. [2023-11-17 12:03:11,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:11,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 52.0) internal successors, (988), 19 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:11,258 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 52.0) internal successors, (988), 19 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:11,258 INFO L175 Difference]: Start difference. First operand has 319 places, 933 transitions, 23133 flow. Second operand 18 states and 132 transitions. [2023-11-17 12:03:11,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 943 transitions, 24878 flow [2023-11-17 12:03:12,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 943 transitions, 23621 flow, removed 583 selfloop flow, removed 14 redundant places. [2023-11-17 12:03:12,408 INFO L231 Difference]: Finished difference. Result has 320 places, 914 transitions, 21797 flow [2023-11-17 12:03:12,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=21272, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21797, PETRI_PLACES=320, PETRI_TRANSITIONS=914} [2023-11-17 12:03:12,409 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 297 predicate places. [2023-11-17 12:03:12,410 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 914 transitions, 21797 flow [2023-11-17 12:03:12,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 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 12:03:12,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:12,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:12,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:12,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:12,616 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 12:03:12,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:12,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1348588760, now seen corresponding path program 11 times [2023-11-17 12:03:12,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:12,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819949187] [2023-11-17 12:03:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:12,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:13,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:13,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819949187] [2023-11-17 12:03:13,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819949187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:13,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793136559] [2023-11-17 12:03:13,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:03:13,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:13,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:13,204 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 12:03:13,205 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 12:03:13,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:03:13,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:13,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 12:03:13,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:13,682 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:03:13,682 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 93 treesize of output 52 [2023-11-17 12:03:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:13,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:13,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:03:13,820 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 174 treesize of output 170 [2023-11-17 12:03:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:14,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793136559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:14,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:14,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 38 [2023-11-17 12:03:14,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642170286] [2023-11-17 12:03:14,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:14,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 12:03:14,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:14,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 12:03:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 12:03:14,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:03:14,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 914 transitions, 21797 flow. Second operand has 40 states, 40 states have (on average 4.55) internal successors, (182), 40 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:14,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:14,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:03:14,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:16,618 INFO L124 PetriNetUnfolderBase]: 4533/7292 cut-off events. [2023-11-17 12:03:16,618 INFO L125 PetriNetUnfolderBase]: For 169679/169679 co-relation queries the response was YES. [2023-11-17 12:03:16,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73725 conditions, 7292 events. 4533/7292 cut-off events. For 169679/169679 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 45840 event pairs, 965 based on Foata normal form. 12/7304 useless extension candidates. Maximal degree in co-relation 73629. Up to 6118 conditions per place. [2023-11-17 12:03:16,691 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 815 selfloop transitions, 141 changer transitions 19/975 dead transitions. [2023-11-17 12:03:16,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 975 transitions, 25095 flow [2023-11-17 12:03:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:03:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:03:16,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 102 transitions. [2023-11-17 12:03:16,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13076923076923078 [2023-11-17 12:03:16,692 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 102 transitions. [2023-11-17 12:03:16,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 102 transitions. [2023-11-17 12:03:16,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:16,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 102 transitions. [2023-11-17 12:03:16,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 6.8) internal successors, (102), 15 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 12:03:16,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:16,693 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:16,693 INFO L175 Difference]: Start difference. First operand has 320 places, 914 transitions, 21797 flow. Second operand 15 states and 102 transitions. [2023-11-17 12:03:16,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 975 transitions, 25095 flow [2023-11-17 12:03:17,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 975 transitions, 24787 flow, removed 47 selfloop flow, removed 15 redundant places. [2023-11-17 12:03:17,583 INFO L231 Difference]: Finished difference. Result has 322 places, 930 transitions, 22267 flow [2023-11-17 12:03:17,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=21491, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22267, PETRI_PLACES=322, PETRI_TRANSITIONS=930} [2023-11-17 12:03:17,584 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 299 predicate places. [2023-11-17 12:03:17,584 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 930 transitions, 22267 flow [2023-11-17 12:03:17,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.55) internal successors, (182), 40 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:17,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:17,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:17,589 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 12:03:17,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:17,785 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 12:03:17,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash 142231802, now seen corresponding path program 12 times [2023-11-17 12:03:17,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:17,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831843826] [2023-11-17 12:03:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:17,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:18,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:18,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831843826] [2023-11-17 12:03:18,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831843826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:18,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041868060] [2023-11-17 12:03:18,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:03:18,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:18,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:18,344 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 12:03:18,344 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 12:03:18,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:03:18,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:18,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:03:18,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:19,002 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:03:19,003 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 93 treesize of output 52 [2023-11-17 12:03:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:19,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:19,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:03:19,188 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 174 treesize of output 170 [2023-11-17 12:03:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:20,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041868060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:20,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:20,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 38 [2023-11-17 12:03:20,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399216442] [2023-11-17 12:03:20,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:20,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 12:03:20,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 12:03:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 12:03:20,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:03:20,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 930 transitions, 22267 flow. Second operand has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:20,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:20,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:03:20,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:22,812 INFO L124 PetriNetUnfolderBase]: 4716/7547 cut-off events. [2023-11-17 12:03:22,812 INFO L125 PetriNetUnfolderBase]: For 189188/189188 co-relation queries the response was YES. [2023-11-17 12:03:22,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77990 conditions, 7547 events. 4716/7547 cut-off events. For 189188/189188 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 47366 event pairs, 428 based on Foata normal form. 12/7559 useless extension candidates. Maximal degree in co-relation 77892. Up to 3259 conditions per place. [2023-11-17 12:03:22,892 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 681 selfloop transitions, 323 changer transitions 19/1023 dead transitions. [2023-11-17 12:03:22,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1023 transitions, 26441 flow [2023-11-17 12:03:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:03:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:03:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 125 transitions. [2023-11-17 12:03:22,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1414027149321267 [2023-11-17 12:03:22,893 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 125 transitions. [2023-11-17 12:03:22,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 125 transitions. [2023-11-17 12:03:22,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:22,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 125 transitions. [2023-11-17 12:03:22,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:22,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:22,894 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:22,894 INFO L175 Difference]: Start difference. First operand has 322 places, 930 transitions, 22267 flow. Second operand 17 states and 125 transitions. [2023-11-17 12:03:22,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1023 transitions, 26441 flow [2023-11-17 12:03:23,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1023 transitions, 26324 flow, removed 42 selfloop flow, removed 10 redundant places. [2023-11-17 12:03:23,998 INFO L231 Difference]: Finished difference. Result has 331 places, 945 transitions, 23557 flow [2023-11-17 12:03:23,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=22152, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23557, PETRI_PLACES=331, PETRI_TRANSITIONS=945} [2023-11-17 12:03:23,999 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 308 predicate places. [2023-11-17 12:03:23,999 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 945 transitions, 23557 flow [2023-11-17 12:03:23,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:23,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:23,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:24,005 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 12:03:24,199 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,SelfDestructingSolverStorable82 [2023-11-17 12:03:24,200 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 12:03:24,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:24,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1070496680, now seen corresponding path program 13 times [2023-11-17 12:03:24,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:24,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802480135] [2023-11-17 12:03:24,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:24,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:24,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:24,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802480135] [2023-11-17 12:03:24,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802480135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:24,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116303756] [2023-11-17 12:03:24,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:03:24,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:24,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:24,652 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 12:03:24,653 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 12:03:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:24,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 12:03:24,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:25,138 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:03:25,139 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 93 treesize of output 52 [2023-11-17 12:03:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:25,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:25,341 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:03:25,342 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 166 treesize of output 166 [2023-11-17 12:03:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:25,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116303756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:25,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:25,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 36 [2023-11-17 12:03:25,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699376444] [2023-11-17 12:03:25,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:25,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 12:03:25,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:25,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 12:03:25,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2023-11-17 12:03:25,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:03:25,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 945 transitions, 23557 flow. Second operand has 38 states, 38 states have (on average 4.631578947368421) internal successors, (176), 38 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 12:03:25,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:25,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:03:25,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:28,426 INFO L124 PetriNetUnfolderBase]: 4743/7688 cut-off events. [2023-11-17 12:03:28,427 INFO L125 PetriNetUnfolderBase]: For 208672/208672 co-relation queries the response was YES. [2023-11-17 12:03:28,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82041 conditions, 7688 events. 4743/7688 cut-off events. For 208672/208672 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 49277 event pairs, 592 based on Foata normal form. 12/7700 useless extension candidates. Maximal degree in co-relation 81940. Up to 4229 conditions per place. [2023-11-17 12:03:28,510 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 793 selfloop transitions, 209 changer transitions 21/1023 dead transitions. [2023-11-17 12:03:28,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1023 transitions, 27114 flow [2023-11-17 12:03:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:03:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:03:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 110 transitions. [2023-11-17 12:03:28,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14102564102564102 [2023-11-17 12:03:28,511 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 110 transitions. [2023-11-17 12:03:28,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 110 transitions. [2023-11-17 12:03:28,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:28,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 110 transitions. [2023-11-17 12:03:28,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:28,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:28,512 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:28,512 INFO L175 Difference]: Start difference. First operand has 331 places, 945 transitions, 23557 flow. Second operand 15 states and 110 transitions. [2023-11-17 12:03:28,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1023 transitions, 27114 flow [2023-11-17 12:03:29,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1023 transitions, 26496 flow, removed 188 selfloop flow, removed 12 redundant places. [2023-11-17 12:03:29,922 INFO L231 Difference]: Finished difference. Result has 334 places, 939 transitions, 23250 flow [2023-11-17 12:03:29,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=22951, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23250, PETRI_PLACES=334, PETRI_TRANSITIONS=939} [2023-11-17 12:03:29,922 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 311 predicate places. [2023-11-17 12:03:29,923 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 939 transitions, 23250 flow [2023-11-17 12:03:29,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.631578947368421) internal successors, (176), 38 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 12:03:29,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:29,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:29,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:30,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:30,123 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 12:03:30,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1841114856, now seen corresponding path program 14 times [2023-11-17 12:03:30,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:30,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635807839] [2023-11-17 12:03:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:30,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:30,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635807839] [2023-11-17 12:03:30,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635807839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:30,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184047857] [2023-11-17 12:03:30,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:03:30,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:30,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:30,933 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 12:03:30,933 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 12:03:31,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:03:31,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:31,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 12:03:31,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:31,582 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:03:31,582 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 93 treesize of output 52 [2023-11-17 12:03:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:31,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:31,829 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:03:31,829 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 178 treesize of output 176 [2023-11-17 12:03:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:32,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184047857] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:32,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:32,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2023-11-17 12:03:32,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647823351] [2023-11-17 12:03:32,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:32,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 12:03:32,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:32,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 12:03:32,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 12:03:32,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:03:32,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 939 transitions, 23250 flow. Second operand has 41 states, 41 states have (on average 4.609756097560975) internal successors, (189), 41 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 12:03:32,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:32,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:03:32,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:35,419 INFO L124 PetriNetUnfolderBase]: 4720/7643 cut-off events. [2023-11-17 12:03:35,419 INFO L125 PetriNetUnfolderBase]: For 196518/196518 co-relation queries the response was YES. [2023-11-17 12:03:35,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80829 conditions, 7643 events. 4720/7643 cut-off events. For 196518/196518 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 48963 event pairs, 1058 based on Foata normal form. 12/7655 useless extension candidates. Maximal degree in co-relation 80726. Up to 4293 conditions per place. [2023-11-17 12:03:35,515 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 854 selfloop transitions, 127 changer transitions 25/1006 dead transitions. [2023-11-17 12:03:35,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1006 transitions, 26149 flow [2023-11-17 12:03:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:03:35,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:03:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 178 transitions. [2023-11-17 12:03:35,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13165680473372782 [2023-11-17 12:03:35,517 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 178 transitions. [2023-11-17 12:03:35,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 178 transitions. [2023-11-17 12:03:35,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:35,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 178 transitions. [2023-11-17 12:03:35,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:35,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 52.0) internal successors, (1404), 27 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:35,518 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 52.0) internal successors, (1404), 27 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:35,518 INFO L175 Difference]: Start difference. First operand has 334 places, 939 transitions, 23250 flow. Second operand 26 states and 178 transitions. [2023-11-17 12:03:35,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1006 transitions, 26149 flow [2023-11-17 12:03:36,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1006 transitions, 25713 flow, removed 17 selfloop flow, removed 14 redundant places. [2023-11-17 12:03:36,921 INFO L231 Difference]: Finished difference. Result has 349 places, 939 transitions, 23081 flow [2023-11-17 12:03:36,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=22831, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=23081, PETRI_PLACES=349, PETRI_TRANSITIONS=939} [2023-11-17 12:03:36,922 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 326 predicate places. [2023-11-17 12:03:36,922 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 939 transitions, 23081 flow [2023-11-17 12:03:36,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.609756097560975) internal successors, (189), 41 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 12:03:36,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:36,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:36,929 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 12:03:37,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:37,130 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 12:03:37,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1746143314, now seen corresponding path program 15 times [2023-11-17 12:03:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:37,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421213689] [2023-11-17 12:03:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:37,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:38,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:38,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421213689] [2023-11-17 12:03:38,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421213689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:38,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091076867] [2023-11-17 12:03:38,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:03:38,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:38,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:38,013 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 12:03:38,016 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 12:03:38,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:03:38,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:38,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-17 12:03:38,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:38,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:03:38,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:03:38,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:03:38,939 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:03:38,939 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 93 treesize of output 52 [2023-11-17 12:03:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:38,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:40,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:03:40,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2023-11-17 12:03:40,366 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:03:40,367 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 374 treesize of output 333 [2023-11-17 12:03:40,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:03:40,380 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 294 treesize of output 238 [2023-11-17 12:03:40,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:03:40,391 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 230 treesize of output 206 [2023-11-17 12:03:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 2 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:03:40,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091076867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:40,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:40,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 42 [2023-11-17 12:03:40,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606213298] [2023-11-17 12:03:40,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:40,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 12:03:40,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:40,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 12:03:40,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1575, Unknown=8, NotChecked=0, Total=1806 [2023-11-17 12:03:40,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:03:40,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 939 transitions, 23081 flow. Second operand has 43 states, 43 states have (on average 4.511627906976744) internal successors, (194), 43 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 12:03:40,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:40,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:03:40,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:44,902 INFO L124 PetriNetUnfolderBase]: 4927/7928 cut-off events. [2023-11-17 12:03:44,902 INFO L125 PetriNetUnfolderBase]: For 207282/207282 co-relation queries the response was YES. [2023-11-17 12:03:44,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83741 conditions, 7928 events. 4927/7928 cut-off events. For 207282/207282 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 50789 event pairs, 576 based on Foata normal form. 30/7958 useless extension candidates. Maximal degree in co-relation 83635. Up to 3666 conditions per place. [2023-11-17 12:03:45,007 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 766 selfloop transitions, 311 changer transitions 21/1098 dead transitions. [2023-11-17 12:03:45,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1098 transitions, 28507 flow [2023-11-17 12:03:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 12:03:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 12:03:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 258 transitions. [2023-11-17 12:03:45,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14592760180995476 [2023-11-17 12:03:45,008 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 258 transitions. [2023-11-17 12:03:45,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 258 transitions. [2023-11-17 12:03:45,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:45,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 258 transitions. [2023-11-17 12:03:45,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 7.588235294117647) internal successors, (258), 34 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:45,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 52.0) internal successors, (1820), 35 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:45,010 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 52.0) internal successors, (1820), 35 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:45,010 INFO L175 Difference]: Start difference. First operand has 349 places, 939 transitions, 23081 flow. Second operand 34 states and 258 transitions. [2023-11-17 12:03:45,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1098 transitions, 28507 flow [2023-11-17 12:03:46,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1098 transitions, 28100 flow, removed 25 selfloop flow, removed 24 redundant places. [2023-11-17 12:03:46,627 INFO L231 Difference]: Finished difference. Result has 362 places, 994 transitions, 25080 flow [2023-11-17 12:03:46,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=22681, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=25080, PETRI_PLACES=362, PETRI_TRANSITIONS=994} [2023-11-17 12:03:46,628 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 339 predicate places. [2023-11-17 12:03:46,628 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 994 transitions, 25080 flow [2023-11-17 12:03:46,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.511627906976744) internal successors, (194), 43 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 12:03:46,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:46,629 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:46,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:46,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:46,837 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 12:03:46,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash -988890614, now seen corresponding path program 16 times [2023-11-17 12:03:46,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:46,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115168113] [2023-11-17 12:03:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:46,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:47,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:47,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115168113] [2023-11-17 12:03:47,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115168113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:47,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520902077] [2023-11-17 12:03:47,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:03:47,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:47,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:47,791 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 12:03:47,792 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 12:03:47,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:03:47,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:47,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:03:47,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:48,184 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:03:48,185 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 93 treesize of output 52 [2023-11-17 12:03:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:03:48,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:48,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:03:48,371 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 130 [2023-11-17 12:03:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:03:48,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520902077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:48,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:48,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 7] total 30 [2023-11-17 12:03:48,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646068973] [2023-11-17 12:03:48,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:48,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 12:03:48,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:48,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 12:03:48,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2023-11-17 12:03:48,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:03:48,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 994 transitions, 25080 flow. Second operand has 31 states, 31 states have (on average 4.903225806451613) internal successors, (152), 31 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 12:03:48,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:48,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:03:48,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:52,303 INFO L124 PetriNetUnfolderBase]: 5377/8549 cut-off events. [2023-11-17 12:03:52,304 INFO L125 PetriNetUnfolderBase]: For 250955/250955 co-relation queries the response was YES. [2023-11-17 12:03:52,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94993 conditions, 8549 events. 5377/8549 cut-off events. For 250955/250955 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 54453 event pairs, 1089 based on Foata normal form. 9/8558 useless extension candidates. Maximal degree in co-relation 94886. Up to 7024 conditions per place. [2023-11-17 12:03:52,420 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 893 selfloop transitions, 266 changer transitions 10/1169 dead transitions. [2023-11-17 12:03:52,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 1169 transitions, 32276 flow [2023-11-17 12:03:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:03:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:03:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 165 transitions. [2023-11-17 12:03:52,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14423076923076922 [2023-11-17 12:03:52,422 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 165 transitions. [2023-11-17 12:03:52,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 165 transitions. [2023-11-17 12:03:52,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:52,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 165 transitions. [2023-11-17 12:03:52,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.5) internal successors, (165), 22 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 12:03:52,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 52.0) internal successors, (1196), 23 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:52,423 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 52.0) internal successors, (1196), 23 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:52,423 INFO L175 Difference]: Start difference. First operand has 362 places, 994 transitions, 25080 flow. Second operand 22 states and 165 transitions. [2023-11-17 12:03:52,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 1169 transitions, 32276 flow [2023-11-17 12:03:54,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1169 transitions, 31510 flow, removed 275 selfloop flow, removed 21 redundant places. [2023-11-17 12:03:54,438 INFO L231 Difference]: Finished difference. Result has 366 places, 1117 transitions, 29521 flow [2023-11-17 12:03:54,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=24324, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=29521, PETRI_PLACES=366, PETRI_TRANSITIONS=1117} [2023-11-17 12:03:54,439 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 343 predicate places. [2023-11-17 12:03:54,439 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 1117 transitions, 29521 flow [2023-11-17 12:03:54,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.903225806451613) internal successors, (152), 31 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 12:03:54,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:54,439 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:54,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:54,640 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,SelfDestructingSolverStorable86 [2023-11-17 12:03:54,640 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 12:03:54,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1210106414, now seen corresponding path program 17 times [2023-11-17 12:03:54,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:54,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102152600] [2023-11-17 12:03:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:54,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:55,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:55,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102152600] [2023-11-17 12:03:55,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102152600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:55,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606205666] [2023-11-17 12:03:55,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:03:55,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:55,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:55,423 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 12:03:55,425 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 12:03:55,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:03:55,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:55,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 12:03:55,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:56,035 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:03:56,035 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 93 treesize of output 52 [2023-11-17 12:03:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:56,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:56,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:03:56,370 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 169 [2023-11-17 12:03:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:57,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606205666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:57,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:57,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 41 [2023-11-17 12:03:57,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688525656] [2023-11-17 12:03:57,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:57,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 12:03:57,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:57,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 12:03:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1550, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 12:03:57,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:03:57,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1117 transitions, 29521 flow. Second operand has 43 states, 43 states have (on average 4.534883720930233) internal successors, (195), 43 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:57,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:57,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:03:57,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:01,527 INFO L124 PetriNetUnfolderBase]: 5532/8820 cut-off events. [2023-11-17 12:04:01,527 INFO L125 PetriNetUnfolderBase]: For 277907/277907 co-relation queries the response was YES. [2023-11-17 12:04:01,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100498 conditions, 8820 events. 5532/8820 cut-off events. For 277907/277907 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 56341 event pairs, 1187 based on Foata normal form. 35/8855 useless extension candidates. Maximal degree in co-relation 100387. Up to 6623 conditions per place. [2023-11-17 12:04:01,628 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 1082 selfloop transitions, 211 changer transitions 29/1322 dead transitions. [2023-11-17 12:04:01,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1322 transitions, 36006 flow [2023-11-17 12:04:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:04:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:04:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 260 transitions. [2023-11-17 12:04:01,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14285714285714285 [2023-11-17 12:04:01,630 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 260 transitions. [2023-11-17 12:04:01,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 260 transitions. [2023-11-17 12:04:01,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:01,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 260 transitions. [2023-11-17 12:04:01,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 7.428571428571429) internal successors, (260), 35 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:01,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 52.0) internal successors, (1872), 36 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:01,631 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 52.0) internal successors, (1872), 36 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:01,631 INFO L175 Difference]: Start difference. First operand has 366 places, 1117 transitions, 29521 flow. Second operand 35 states and 260 transitions. [2023-11-17 12:04:01,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1322 transitions, 36006 flow [2023-11-17 12:04:03,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1322 transitions, 34112 flow, removed 909 selfloop flow, removed 13 redundant places. [2023-11-17 12:04:03,707 INFO L231 Difference]: Finished difference. Result has 397 places, 1169 transitions, 29815 flow [2023-11-17 12:04:03,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=27743, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=29815, PETRI_PLACES=397, PETRI_TRANSITIONS=1169} [2023-11-17 12:04:03,707 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 374 predicate places. [2023-11-17 12:04:03,708 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1169 transitions, 29815 flow [2023-11-17 12:04:03,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.534883720930233) internal successors, (195), 43 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:03,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:03,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:03,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-11-17 12:04:03,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2023-11-17 12:04:03,908 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 12:04:03,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:03,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1893326739, now seen corresponding path program 30 times [2023-11-17 12:04:03,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:03,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812651114] [2023-11-17 12:04:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:03,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:04,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:04,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812651114] [2023-11-17 12:04:04,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812651114] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:04,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630506510] [2023-11-17 12:04:04,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:04:04,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:04,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:04,262 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 12:04:04,264 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 12:04:04,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:04:04,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:04:04,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:04:04,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:04:04,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:04,770 INFO L349 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-11-17 12:04:04,771 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 51 treesize of output 71 [2023-11-17 12:04:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:04:04,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630506510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:04,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:04,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 27 [2023-11-17 12:04:04,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140307552] [2023-11-17 12:04:04,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:04,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:04:04,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:04,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:04:04,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:04:04,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:04:04,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1169 transitions, 29815 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 12:04:04,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:04,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:04:04,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:07,953 INFO L124 PetriNetUnfolderBase]: 5585/8836 cut-off events. [2023-11-17 12:04:07,954 INFO L125 PetriNetUnfolderBase]: For 284474/284474 co-relation queries the response was YES. [2023-11-17 12:04:08,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100858 conditions, 8836 events. 5585/8836 cut-off events. For 284474/284474 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 56071 event pairs, 684 based on Foata normal form. 108/8944 useless extension candidates. Maximal degree in co-relation 100739. Up to 5289 conditions per place. [2023-11-17 12:04:08,089 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 835 selfloop transitions, 436 changer transitions 0/1271 dead transitions. [2023-11-17 12:04:08,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1271 transitions, 35283 flow [2023-11-17 12:04:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:04:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:04:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 159 transitions. [2023-11-17 12:04:08,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1528846153846154 [2023-11-17 12:04:08,090 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 159 transitions. [2023-11-17 12:04:08,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 159 transitions. [2023-11-17 12:04:08,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:08,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 159 transitions. [2023-11-17 12:04:08,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.95) internal successors, (159), 20 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 12:04:08,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 52.0) internal successors, (1092), 21 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:08,091 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 52.0) internal successors, (1092), 21 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:08,092 INFO L175 Difference]: Start difference. First operand has 397 places, 1169 transitions, 29815 flow. Second operand 20 states and 159 transitions. [2023-11-17 12:04:08,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1271 transitions, 35283 flow [2023-11-17 12:04:10,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1271 transitions, 34460 flow, removed 239 selfloop flow, removed 22 redundant places. [2023-11-17 12:04:10,890 INFO L231 Difference]: Finished difference. Result has 392 places, 1199 transitions, 31657 flow [2023-11-17 12:04:10,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=28220, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=31657, PETRI_PLACES=392, PETRI_TRANSITIONS=1199} [2023-11-17 12:04:10,892 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 369 predicate places. [2023-11-17 12:04:10,892 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1199 transitions, 31657 flow [2023-11-17 12:04:10,892 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 12:04:10,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:10,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:10,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-11-17 12:04:11,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-11-17 12:04:11,098 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 12:04:11,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2143509912, now seen corresponding path program 18 times [2023-11-17 12:04:11,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:11,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016008502] [2023-11-17 12:04:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:11,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:11,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:11,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016008502] [2023-11-17 12:04:11,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016008502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:11,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350888064] [2023-11-17 12:04:11,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:04:11,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:11,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:11,920 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 12:04:11,920 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 12:04:12,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:04:12,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:04:12,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-17 12:04:12,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:12,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:04:12,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:04:12,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:04:12,655 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:04:12,656 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 93 treesize of output 52 [2023-11-17 12:04:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:12,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:15,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:04:15,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2023-11-17 12:04:15,659 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:04:15,660 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 1526 treesize of output 1341 [2023-11-17 12:04:15,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:04:15,674 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 294 treesize of output 270 [2023-11-17 12:04:15,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:04:15,684 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 262 treesize of output 206 [2023-11-17 12:04:15,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:04:15,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2023-11-17 12:04:15,732 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 12:04:15,733 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 1526 treesize of output 1341 [2023-11-17 12:04:15,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:04:15,747 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 294 treesize of output 270 [2023-11-17 12:04:15,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:04:15,757 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 262 treesize of output 206 [2023-11-17 12:04:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:15,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350888064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:15,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:15,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2023-11-17 12:04:15,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148495556] [2023-11-17 12:04:15,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:15,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-17 12:04:15,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-17 12:04:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1722, Unknown=29, NotChecked=0, Total=2070 [2023-11-17 12:04:15,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:04:15,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1199 transitions, 31657 flow. Second operand has 46 states, 46 states have (on average 4.3478260869565215) internal successors, (200), 46 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:15,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:15,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:04:15,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:20,730 INFO L124 PetriNetUnfolderBase]: 5588/8887 cut-off events. [2023-11-17 12:04:20,730 INFO L125 PetriNetUnfolderBase]: For 285904/285904 co-relation queries the response was YES. [2023-11-17 12:04:20,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103541 conditions, 8887 events. 5588/8887 cut-off events. For 285904/285904 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 56951 event pairs, 1208 based on Foata normal form. 30/8917 useless extension candidates. Maximal degree in co-relation 103424. Up to 5154 conditions per place. [2023-11-17 12:04:20,856 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 1075 selfloop transitions, 191 changer transitions 31/1297 dead transitions. [2023-11-17 12:04:20,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1297 transitions, 35664 flow [2023-11-17 12:04:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 12:04:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 12:04:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 246 transitions. [2023-11-17 12:04:20,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13914027149321267 [2023-11-17 12:04:20,857 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 246 transitions. [2023-11-17 12:04:20,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 246 transitions. [2023-11-17 12:04:20,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:20,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 246 transitions. [2023-11-17 12:04:20,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 7.235294117647059) internal successors, (246), 34 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:20,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 52.0) internal successors, (1820), 35 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:20,859 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 52.0) internal successors, (1820), 35 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:20,859 INFO L175 Difference]: Start difference. First operand has 392 places, 1199 transitions, 31657 flow. Second operand 34 states and 246 transitions. [2023-11-17 12:04:20,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1297 transitions, 35664 flow [2023-11-17 12:04:23,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 1297 transitions, 34214 flow, removed 504 selfloop flow, removed 14 redundant places. [2023-11-17 12:04:23,583 INFO L231 Difference]: Finished difference. Result has 421 places, 1219 transitions, 31327 flow [2023-11-17 12:04:23,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=30227, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=31327, PETRI_PLACES=421, PETRI_TRANSITIONS=1219} [2023-11-17 12:04:23,584 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 398 predicate places. [2023-11-17 12:04:23,584 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 1219 transitions, 31327 flow [2023-11-17 12:04:23,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.3478260869565215) internal successors, (200), 46 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:23,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:23,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:23,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-11-17 12:04:23,790 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,SelfDestructingSolverStorable89 [2023-11-17 12:04:23,791 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 12:04:23,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:23,791 INFO L85 PathProgramCache]: Analyzing trace with hash -425940881, now seen corresponding path program 31 times [2023-11-17 12:04:23,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:23,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974571998] [2023-11-17 12:04:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:23,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:24,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:24,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974571998] [2023-11-17 12:04:24,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974571998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:24,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012861837] [2023-11-17 12:04:24,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:04:24,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:24,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:24,168 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 12:04:24,169 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 12:04:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:24,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:04:24,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:24,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:24,643 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 12:04:24,643 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 51 treesize of output 84 [2023-11-17 12:04:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:24,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012861837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:24,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:24,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 31 [2023-11-17 12:04:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141920930] [2023-11-17 12:04:24,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:24,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:04:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:04:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:04:24,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:04:24,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 1219 transitions, 31327 flow. Second operand has 32 states, 32 states have (on average 4.53125) internal successors, (145), 32 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 12:04:24,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:24,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:04:24,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:28,256 INFO L124 PetriNetUnfolderBase]: 5503/8722 cut-off events. [2023-11-17 12:04:28,256 INFO L125 PetriNetUnfolderBase]: For 260485/260485 co-relation queries the response was YES. [2023-11-17 12:04:28,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100078 conditions, 8722 events. 5503/8722 cut-off events. For 260485/260485 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 55084 event pairs, 1195 based on Foata normal form. 48/8770 useless extension candidates. Maximal degree in co-relation 99952. Up to 7566 conditions per place. [2023-11-17 12:04:28,389 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 1064 selfloop transitions, 168 changer transitions 0/1232 dead transitions. [2023-11-17 12:04:28,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1232 transitions, 33772 flow [2023-11-17 12:04:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:04:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:04:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 108 transitions. [2023-11-17 12:04:28,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13846153846153847 [2023-11-17 12:04:28,390 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 108 transitions. [2023-11-17 12:04:28,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 108 transitions. [2023-11-17 12:04:28,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:28,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 108 transitions. [2023-11-17 12:04:28,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:28,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:28,391 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:28,391 INFO L175 Difference]: Start difference. First operand has 421 places, 1219 transitions, 31327 flow. Second operand 15 states and 108 transitions. [2023-11-17 12:04:28,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1232 transitions, 33772 flow [2023-11-17 12:04:30,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1232 transitions, 32994 flow, removed 236 selfloop flow, removed 23 redundant places. [2023-11-17 12:04:30,418 INFO L231 Difference]: Finished difference. Result has 406 places, 1210 transitions, 30663 flow [2023-11-17 12:04:30,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=30195, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=30663, PETRI_PLACES=406, PETRI_TRANSITIONS=1210} [2023-11-17 12:04:30,419 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 383 predicate places. [2023-11-17 12:04:30,419 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 1210 transitions, 30663 flow [2023-11-17 12:04:30,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.53125) internal successors, (145), 32 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 12:04:30,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:30,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:30,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-11-17 12:04:30,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:30,620 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 12:04:30,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1967327133, now seen corresponding path program 32 times [2023-11-17 12:04:30,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:30,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072976807] [2023-11-17 12:04:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:30,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:30,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:30,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072976807] [2023-11-17 12:04:30,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072976807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:30,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794940689] [2023-11-17 12:04:30,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:04:30,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:30,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:30,974 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 12:04:30,976 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 12:04:31,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:04:31,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:04:31,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:04:31,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:31,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:31,540 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-11-17 12:04:31,540 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 53 treesize of output 90 [2023-11-17 12:04:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:31,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794940689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:31,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:31,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 36 [2023-11-17 12:04:31,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631107651] [2023-11-17 12:04:31,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:31,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 12:04:31,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:31,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 12:04:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2023-11-17 12:04:31,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:04:31,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 1210 transitions, 30663 flow. Second operand has 37 states, 37 states have (on average 4.513513513513513) internal successors, (167), 37 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:31,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:31,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:04:31,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:34,844 INFO L124 PetriNetUnfolderBase]: 5422/8599 cut-off events. [2023-11-17 12:04:34,844 INFO L125 PetriNetUnfolderBase]: For 245707/245707 co-relation queries the response was YES. [2023-11-17 12:04:34,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97740 conditions, 8599 events. 5422/8599 cut-off events. For 245707/245707 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 54264 event pairs, 1192 based on Foata normal form. 48/8647 useless extension candidates. Maximal degree in co-relation 97620. Up to 7461 conditions per place. [2023-11-17 12:04:34,962 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 1069 selfloop transitions, 152 changer transitions 0/1221 dead transitions. [2023-11-17 12:04:34,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1221 transitions, 33104 flow [2023-11-17 12:04:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:04:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:04:34,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 100 transitions. [2023-11-17 12:04:34,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.13736263736263737 [2023-11-17 12:04:34,963 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 100 transitions. [2023-11-17 12:04:34,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 100 transitions. [2023-11-17 12:04:34,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:34,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 100 transitions. [2023-11-17 12:04:34,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:34,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 52.0) internal successors, (780), 15 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:34,964 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 52.0) internal successors, (780), 15 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:34,964 INFO L175 Difference]: Start difference. First operand has 406 places, 1210 transitions, 30663 flow. Second operand 14 states and 100 transitions. [2023-11-17 12:04:34,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1221 transitions, 33104 flow [2023-11-17 12:04:37,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1221 transitions, 32702 flow, removed 34 selfloop flow, removed 15 redundant places. [2023-11-17 12:04:37,244 INFO L231 Difference]: Finished difference. Result has 403 places, 1200 transitions, 30362 flow [2023-11-17 12:04:37,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=29954, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=30362, PETRI_PLACES=403, PETRI_TRANSITIONS=1200} [2023-11-17 12:04:37,245 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 380 predicate places. [2023-11-17 12:04:37,245 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1200 transitions, 30362 flow [2023-11-17 12:04:37,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.513513513513513) internal successors, (167), 37 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:37,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:37,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:37,252 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 12:04:37,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:37,446 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 12:04:37,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash -765403700, now seen corresponding path program 19 times [2023-11-17 12:04:37,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:37,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051943929] [2023-11-17 12:04:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:37,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:38,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:38,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051943929] [2023-11-17 12:04:38,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051943929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:38,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138223273] [2023-11-17 12:04:38,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:04:38,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:38,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:38,240 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 12:04:38,241 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 12:04:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:38,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 12:04:38,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:38,808 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 12:04:38,809 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 93 treesize of output 52 [2023-11-17 12:04:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:38,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:39,081 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-11-17 12:04:39,081 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 199 treesize of output 164 [2023-11-17 12:04:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:39,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138223273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:39,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:39,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 41 [2023-11-17 12:04:39,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554284721] [2023-11-17 12:04:39,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:39,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 12:04:39,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:39,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 12:04:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 12:04:39,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:04:39,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1200 transitions, 30362 flow. Second operand has 43 states, 43 states have (on average 4.534883720930233) internal successors, (195), 43 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:39,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:39,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:04:39,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:43,298 INFO L124 PetriNetUnfolderBase]: 5560/8791 cut-off events. [2023-11-17 12:04:43,298 INFO L125 PetriNetUnfolderBase]: For 253910/253910 co-relation queries the response was YES. [2023-11-17 12:04:43,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100325 conditions, 8791 events. 5560/8791 cut-off events. For 253910/253910 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 55536 event pairs, 728 based on Foata normal form. 12/8803 useless extension candidates. Maximal degree in co-relation 100206. Up to 5445 conditions per place. [2023-11-17 12:04:43,419 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 971 selfloop transitions, 287 changer transitions 20/1278 dead transitions. [2023-11-17 12:04:43,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 1278 transitions, 34592 flow [2023-11-17 12:04:43,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:04:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:04:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 138 transitions. [2023-11-17 12:04:43,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1326923076923077 [2023-11-17 12:04:43,420 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 138 transitions. [2023-11-17 12:04:43,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 138 transitions. [2023-11-17 12:04:43,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:43,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 138 transitions. [2023-11-17 12:04:43,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:43,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 52.0) internal successors, (1092), 21 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:43,421 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 52.0) internal successors, (1092), 21 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:43,421 INFO L175 Difference]: Start difference. First operand has 403 places, 1200 transitions, 30362 flow. Second operand 20 states and 138 transitions. [2023-11-17 12:04:43,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 1278 transitions, 34592 flow [2023-11-17 12:04:45,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1278 transitions, 34241 flow, removed 29 selfloop flow, removed 12 redundant places. [2023-11-17 12:04:45,533 INFO L231 Difference]: Finished difference. Result has 418 places, 1222 transitions, 31491 flow [2023-11-17 12:04:45,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=30011, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=31491, PETRI_PLACES=418, PETRI_TRANSITIONS=1222} [2023-11-17 12:04:45,534 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 395 predicate places. [2023-11-17 12:04:45,534 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1222 transitions, 31491 flow [2023-11-17 12:04:45,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.534883720930233) internal successors, (195), 43 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:45,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:45,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:45,543 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 12:04:45,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:45,735 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 12:04:45,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:45,735 INFO L85 PathProgramCache]: Analyzing trace with hash -656734675, now seen corresponding path program 33 times [2023-11-17 12:04:45,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:45,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878915037] [2023-11-17 12:04:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:45,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:46,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878915037] [2023-11-17 12:04:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878915037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236606931] [2023-11-17 12:04:46,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:04:46,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:46,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:46,248 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 12:04:46,249 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 12:04:46,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:04:46,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:04:46,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 12:04:46,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:46,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:04:46,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:04:46,792 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:04:46,792 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 12:04:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:46,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:47,080 INFO L349 Elim1Store]: treesize reduction 11, result has 84.9 percent of original size [2023-11-17 12:04:47,080 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 110 treesize of output 131 [2023-11-17 12:04:47,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:04:47,090 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 65 treesize of output 58 [2023-11-17 12:04:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:47,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236606931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:47,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:47,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 12:04:47,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891023484] [2023-11-17 12:04:47,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:47,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 12:04:47,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:47,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 12:04:47,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1484, Unknown=9, NotChecked=0, Total=1640 [2023-11-17 12:04:47,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:04:47,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1222 transitions, 31491 flow. Second operand has 41 states, 41 states have (on average 4.414634146341464) internal successors, (181), 41 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 12:04:47,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:47,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:04:47,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:51,146 INFO L124 PetriNetUnfolderBase]: 5458/8563 cut-off events. [2023-11-17 12:04:51,146 INFO L125 PetriNetUnfolderBase]: For 261340/261340 co-relation queries the response was YES. [2023-11-17 12:04:51,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99656 conditions, 8563 events. 5458/8563 cut-off events. For 261340/261340 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 53367 event pairs, 405 based on Foata normal form. 48/8611 useless extension candidates. Maximal degree in co-relation 99529. Up to 4853 conditions per place. [2023-11-17 12:04:51,276 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 931 selfloop transitions, 298 changer transitions 0/1229 dead transitions. [2023-11-17 12:04:51,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1229 transitions, 33925 flow [2023-11-17 12:04:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:04:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:04:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2023-11-17 12:04:51,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1510989010989011 [2023-11-17 12:04:51,277 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 110 transitions. [2023-11-17 12:04:51,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 110 transitions. [2023-11-17 12:04:51,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:51,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 110 transitions. [2023-11-17 12:04:51,278 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 12:04:51,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 52.0) internal successors, (780), 15 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:51,278 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 52.0) internal successors, (780), 15 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:51,278 INFO L175 Difference]: Start difference. First operand has 418 places, 1222 transitions, 31491 flow. Second operand 14 states and 110 transitions. [2023-11-17 12:04:51,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1229 transitions, 33925 flow [2023-11-17 12:04:53,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1229 transitions, 33376 flow, removed 77 selfloop flow, removed 18 redundant places. [2023-11-17 12:04:53,301 INFO L231 Difference]: Finished difference. Result has 404 places, 1206 transitions, 31273 flow [2023-11-17 12:04:53,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=30554, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=906, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=31273, PETRI_PLACES=404, PETRI_TRANSITIONS=1206} [2023-11-17 12:04:53,302 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 381 predicate places. [2023-11-17 12:04:53,302 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 1206 transitions, 31273 flow [2023-11-17 12:04:53,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.414634146341464) internal successors, (181), 41 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 12:04:53,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:53,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:53,309 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 12:04:53,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:53,503 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 12:04:53,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:53,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1899261352, now seen corresponding path program 20 times [2023-11-17 12:04:53,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:53,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972441576] [2023-11-17 12:04:53,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:53,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:04:53,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:53,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972441576] [2023-11-17 12:04:53,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972441576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:53,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179656112] [2023-11-17 12:04:53,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:04:53,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:53,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:53,733 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 12:04:53,734 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 12:04:53,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:04:53,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:04:53,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:04:53,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:54,020 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:04:54,020 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 30 treesize of output 10 [2023-11-17 12:04:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:04:54,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:54,070 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:04:54,071 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 40 treesize of output 56 [2023-11-17 12:04:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:04:54,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179656112] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:54,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:54,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-17 12:04:54,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092020307] [2023-11-17 12:04:54,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:54,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:04:54,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:04:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:04:54,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:04:54,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1206 transitions, 31273 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:54,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:54,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:04:54,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:57,924 INFO L124 PetriNetUnfolderBase]: 5860/9193 cut-off events. [2023-11-17 12:04:57,925 INFO L125 PetriNetUnfolderBase]: For 311290/311290 co-relation queries the response was YES. [2023-11-17 12:04:57,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108989 conditions, 9193 events. 5860/9193 cut-off events. For 311290/311290 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 57585 event pairs, 898 based on Foata normal form. 72/9265 useless extension candidates. Maximal degree in co-relation 108869. Up to 6418 conditions per place. [2023-11-17 12:04:58,047 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 823 selfloop transitions, 477 changer transitions 30/1330 dead transitions. [2023-11-17 12:04:58,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 1330 transitions, 37620 flow [2023-11-17 12:04:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:04:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:04:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 141 transitions. [2023-11-17 12:04:58,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1595022624434389 [2023-11-17 12:04:58,048 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 141 transitions. [2023-11-17 12:04:58,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 141 transitions. [2023-11-17 12:04:58,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:58,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 141 transitions. [2023-11-17 12:04:58,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:58,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:58,049 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:58,049 INFO L175 Difference]: Start difference. First operand has 404 places, 1206 transitions, 31273 flow. Second operand 17 states and 141 transitions. [2023-11-17 12:04:58,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 1330 transitions, 37620 flow [2023-11-17 12:05:00,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1330 transitions, 36943 flow, removed 37 selfloop flow, removed 13 redundant places. [2023-11-17 12:05:00,168 INFO L231 Difference]: Finished difference. Result has 411 places, 1265 transitions, 33769 flow [2023-11-17 12:05:00,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=30643, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=33769, PETRI_PLACES=411, PETRI_TRANSITIONS=1265} [2023-11-17 12:05:00,169 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 388 predicate places. [2023-11-17 12:05:00,169 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 1265 transitions, 33769 flow [2023-11-17 12:05:00,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:00,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:00,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:00,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:00,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:00,370 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 12:05:00,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:00,371 INFO L85 PathProgramCache]: Analyzing trace with hash 725349005, now seen corresponding path program 34 times [2023-11-17 12:05:00,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:00,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615911478] [2023-11-17 12:05:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:00,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:05:00,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:00,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615911478] [2023-11-17 12:05:00,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615911478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:00,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901835437] [2023-11-17 12:05:00,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:05:00,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:00,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:00,669 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 12:05:00,670 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 12:05:00,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:05:00,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:05:00,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 12:05:00,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:01,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:01,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:05:01,316 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 124 treesize of output 88 [2023-11-17 12:05:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:05:01,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901835437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:05:01,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:05:01,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 13] total 39 [2023-11-17 12:05:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454676273] [2023-11-17 12:05:01,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:05:01,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 12:05:01,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:05:01,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 12:05:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 12:05:01,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:05:01,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 1265 transitions, 33769 flow. Second operand has 40 states, 40 states have (on average 4.675) internal successors, (187), 40 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:01,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:05:01,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:05:01,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:06,900 INFO L124 PetriNetUnfolderBase]: 5688/9094 cut-off events. [2023-11-17 12:05:06,900 INFO L125 PetriNetUnfolderBase]: For 302641/302641 co-relation queries the response was YES. [2023-11-17 12:05:06,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109069 conditions, 9094 events. 5688/9094 cut-off events. For 302641/302641 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 58672 event pairs, 820 based on Foata normal form. 100/9194 useless extension candidates. Maximal degree in co-relation 108947. Up to 3094 conditions per place. [2023-11-17 12:05:07,034 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 744 selfloop transitions, 849 changer transitions 166/1759 dead transitions. [2023-11-17 12:05:07,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1759 transitions, 45586 flow [2023-11-17 12:05:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-17 12:05:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-17 12:05:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 395 transitions. [2023-11-17 12:05:07,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14894419306184012 [2023-11-17 12:05:07,035 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 395 transitions. [2023-11-17 12:05:07,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 395 transitions. [2023-11-17 12:05:07,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:07,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 395 transitions. [2023-11-17 12:05:07,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 7.745098039215686) internal successors, (395), 51 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:07,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 52.0) internal successors, (2704), 52 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:07,038 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 52.0) internal successors, (2704), 52 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:07,038 INFO L175 Difference]: Start difference. First operand has 411 places, 1265 transitions, 33769 flow. Second operand 51 states and 395 transitions. [2023-11-17 12:05:07,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1759 transitions, 45586 flow [2023-11-17 12:05:09,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1759 transitions, 44766 flow, removed 228 selfloop flow, removed 10 redundant places. [2023-11-17 12:05:09,349 INFO L231 Difference]: Finished difference. Result has 478 places, 1276 transitions, 35123 flow [2023-11-17 12:05:09,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=32725, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=741, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=35123, PETRI_PLACES=478, PETRI_TRANSITIONS=1276} [2023-11-17 12:05:09,350 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 455 predicate places. [2023-11-17 12:05:09,350 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 1276 transitions, 35123 flow [2023-11-17 12:05:09,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.675) internal successors, (187), 40 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:09,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:09,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:09,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:09,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2023-11-17 12:05:09,551 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 12:05:09,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:09,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1922170136, now seen corresponding path program 21 times [2023-11-17 12:05:09,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:09,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013241348] [2023-11-17 12:05:09,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:09,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:09,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:09,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013241348] [2023-11-17 12:05:09,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013241348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:09,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393509166] [2023-11-17 12:05:09,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:05:09,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:09,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:09,774 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 12:05:09,776 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 12:05:09,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:05:09,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:05:10,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-17 12:05:10,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:10,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:05:10,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:05:10,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:05:10,291 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:05:10,292 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 30 treesize of output 10 [2023-11-17 12:05:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:10,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:10,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:05:10,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 72 [2023-11-17 12:05:10,712 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 12:05:10,713 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 764 treesize of output 696 [2023-11-17 12:05:10,725 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:05:10,725 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:05:10,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:05:10,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 652 treesize of output 536 [2023-11-17 12:05:10,756 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:05:10,757 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:05:10,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:05:10,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 492 treesize of output 456 [2023-11-17 12:05:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:05:12,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393509166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:05:12,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:05:12,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 13] total 35 [2023-11-17 12:05:12,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674457848] [2023-11-17 12:05:12,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:05:12,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:05:12,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:05:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:05:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1029, Unknown=4, NotChecked=0, Total=1190 [2023-11-17 12:05:12,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:05:12,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 1276 transitions, 35123 flow. Second operand has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 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 12:05:12,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:05:12,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:05:12,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:14,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:05:17,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:05:21,665 INFO L124 PetriNetUnfolderBase]: 5537/8891 cut-off events. [2023-11-17 12:05:21,665 INFO L125 PetriNetUnfolderBase]: For 342060/342060 co-relation queries the response was YES. [2023-11-17 12:05:21,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109164 conditions, 8891 events. 5537/8891 cut-off events. For 342060/342060 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 57742 event pairs, 1027 based on Foata normal form. 48/8939 useless extension candidates. Maximal degree in co-relation 109014. Up to 4607 conditions per place. [2023-11-17 12:05:21,808 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 1250 selfloop transitions, 371 changer transitions 21/1642 dead transitions. [2023-11-17 12:05:21,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1642 transitions, 44376 flow [2023-11-17 12:05:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 12:05:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 12:05:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 352 transitions. [2023-11-17 12:05:21,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14715719063545152 [2023-11-17 12:05:21,810 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 352 transitions. [2023-11-17 12:05:21,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 352 transitions. [2023-11-17 12:05:21,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:21,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 352 transitions. [2023-11-17 12:05:21,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 7.6521739130434785) internal successors, (352), 46 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:21,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 52.0) internal successors, (2444), 47 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:21,812 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 52.0) internal successors, (2444), 47 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:21,812 INFO L175 Difference]: Start difference. First operand has 478 places, 1276 transitions, 35123 flow. Second operand 46 states and 352 transitions. [2023-11-17 12:05:21,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1642 transitions, 44376 flow [2023-11-17 12:05:24,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 1642 transitions, 43153 flow, removed 292 selfloop flow, removed 26 redundant places. [2023-11-17 12:05:24,720 INFO L231 Difference]: Finished difference. Result has 490 places, 1304 transitions, 35462 flow [2023-11-17 12:05:24,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=33979, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=35462, PETRI_PLACES=490, PETRI_TRANSITIONS=1304} [2023-11-17 12:05:24,721 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 467 predicate places. [2023-11-17 12:05:24,721 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1304 transitions, 35462 flow [2023-11-17 12:05:24,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 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 12:05:24,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:24,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:24,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:24,922 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,SelfDestructingSolverStorable96 [2023-11-17 12:05:24,922 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 12:05:24,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:24,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1388314242, now seen corresponding path program 22 times [2023-11-17 12:05:24,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:24,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768914196] [2023-11-17 12:05:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:24,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:25,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:25,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768914196] [2023-11-17 12:05:25,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768914196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:25,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231536228] [2023-11-17 12:05:25,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:05:25,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:25,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:25,155 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 12:05:25,156 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 12:05:25,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:05:25,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:05:25,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:05:25,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:25,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:25,525 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 12:05:25,525 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 12:05:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:25,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231536228] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:05:25,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:05:25,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-11-17 12:05:25,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165694164] [2023-11-17 12:05:25,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:05:25,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:05:25,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:05:25,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:05:25,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:05:25,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:05:25,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1304 transitions, 35462 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 12:05:25,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:05:25,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:05:25,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:29,341 INFO L124 PetriNetUnfolderBase]: 5465/8781 cut-off events. [2023-11-17 12:05:29,341 INFO L125 PetriNetUnfolderBase]: For 320495/320495 co-relation queries the response was YES. [2023-11-17 12:05:29,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105195 conditions, 8781 events. 5465/8781 cut-off events. For 320495/320495 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 57303 event pairs, 960 based on Foata normal form. 24/8805 useless extension candidates. Maximal degree in co-relation 105047. Up to 5998 conditions per place. [2023-11-17 12:05:29,477 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 991 selfloop transitions, 322 changer transitions 36/1349 dead transitions. [2023-11-17 12:05:29,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1349 transitions, 38903 flow [2023-11-17 12:05:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:05:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:05:29,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 94 transitions. [2023-11-17 12:05:29,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16433566433566432 [2023-11-17 12:05:29,479 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 94 transitions. [2023-11-17 12:05:29,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 94 transitions. [2023-11-17 12:05:29,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:29,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 94 transitions. [2023-11-17 12:05:29,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 12:05:29,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 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 12:05:29,479 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 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 12:05:29,479 INFO L175 Difference]: Start difference. First operand has 490 places, 1304 transitions, 35462 flow. Second operand 11 states and 94 transitions. [2023-11-17 12:05:29,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1349 transitions, 38903 flow [2023-11-17 12:05:32,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1349 transitions, 38202 flow, removed 87 selfloop flow, removed 24 redundant places. [2023-11-17 12:05:32,057 INFO L231 Difference]: Finished difference. Result has 470 places, 1272 transitions, 34588 flow [2023-11-17 12:05:32,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=34711, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=978, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=34588, PETRI_PLACES=470, PETRI_TRANSITIONS=1272} [2023-11-17 12:05:32,058 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 447 predicate places. [2023-11-17 12:05:32,059 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 1272 transitions, 34588 flow [2023-11-17 12:05:32,059 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 12:05:32,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:32,059 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:32,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:32,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:32,260 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 12:05:32,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1111589762, now seen corresponding path program 35 times [2023-11-17 12:05:32,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:32,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788068617] [2023-11-17 12:05:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:32,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:32,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788068617] [2023-11-17 12:05:32,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788068617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:32,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392155363] [2023-11-17 12:05:32,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:05:32,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:32,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:32,678 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 12:05:32,678 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 12:05:32,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:05:32,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:05:32,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 12:05:32,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:05:33,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:33,204 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 12:05:33,204 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 51 treesize of output 84 [2023-11-17 12:05:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:05:33,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392155363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:05:33,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:05:33,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 34 [2023-11-17 12:05:33,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016993845] [2023-11-17 12:05:33,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:05:33,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:05:33,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:05:33,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:05:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:05:33,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:05:33,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 1272 transitions, 34588 flow. Second operand has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 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 12:05:33,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:05:33,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:05:33,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:37,632 INFO L124 PetriNetUnfolderBase]: 5409/8609 cut-off events. [2023-11-17 12:05:37,632 INFO L125 PetriNetUnfolderBase]: For 306973/306973 co-relation queries the response was YES. [2023-11-17 12:05:37,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103283 conditions, 8609 events. 5409/8609 cut-off events. For 306973/306973 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 54602 event pairs, 1296 based on Foata normal form. 12/8621 useless extension candidates. Maximal degree in co-relation 103143. Up to 5817 conditions per place. [2023-11-17 12:05:37,801 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 1151 selfloop transitions, 164 changer transitions 6/1321 dead transitions. [2023-11-17 12:05:37,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1321 transitions, 37697 flow [2023-11-17 12:05:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:05:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:05:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 184 transitions. [2023-11-17 12:05:37,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14153846153846153 [2023-11-17 12:05:37,802 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 184 transitions. [2023-11-17 12:05:37,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 184 transitions. [2023-11-17 12:05:37,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:37,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 184 transitions. [2023-11-17 12:05:37,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 7.36) internal successors, (184), 25 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:37,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 52.0) internal successors, (1352), 26 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:37,804 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 52.0) internal successors, (1352), 26 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:37,804 INFO L175 Difference]: Start difference. First operand has 470 places, 1272 transitions, 34588 flow. Second operand 25 states and 184 transitions. [2023-11-17 12:05:37,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1321 transitions, 37697 flow [2023-11-17 12:05:39,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1321 transitions, 37117 flow, removed 13 selfloop flow, removed 14 redundant places. [2023-11-17 12:05:39,786 INFO L231 Difference]: Finished difference. Result has 471 places, 1278 transitions, 34438 flow [2023-11-17 12:05:39,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=33963, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=34438, PETRI_PLACES=471, PETRI_TRANSITIONS=1278} [2023-11-17 12:05:39,787 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 448 predicate places. [2023-11-17 12:05:39,787 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1278 transitions, 34438 flow [2023-11-17 12:05:39,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 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 12:05:39,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:39,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:39,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:39,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:39,988 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 12:05:39,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash -437649620, now seen corresponding path program 23 times [2023-11-17 12:05:39,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:39,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123645619] [2023-11-17 12:05:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:39,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:40,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:40,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123645619] [2023-11-17 12:05:40,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123645619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:40,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165616449] [2023-11-17 12:05:40,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:05:40,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:40,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:40,212 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 12:05:40,213 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 12:05:40,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:05:40,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:05:40,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:05:40,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:40,527 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:05:40,527 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 10 [2023-11-17 12:05:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:05:40,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:40,583 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:05:40,583 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 40 treesize of output 56 [2023-11-17 12:05:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:40,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165616449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:05:40,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:05:40,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 8] total 20 [2023-11-17 12:05:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605312536] [2023-11-17 12:05:40,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:05:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:05:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:05:40,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:05:40,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:05:40,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:05:40,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1278 transitions, 34438 flow. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:40,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:05:40,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:05:40,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:44,077 INFO L124 PetriNetUnfolderBase]: 5502/8878 cut-off events. [2023-11-17 12:05:44,077 INFO L125 PetriNetUnfolderBase]: For 328019/328019 co-relation queries the response was YES. [2023-11-17 12:05:44,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106073 conditions, 8878 events. 5502/8878 cut-off events. For 328019/328019 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 58174 event pairs, 922 based on Foata normal form. 76/8954 useless extension candidates. Maximal degree in co-relation 105937. Up to 6328 conditions per place. [2023-11-17 12:05:44,201 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 841 selfloop transitions, 456 changer transitions 20/1317 dead transitions. [2023-11-17 12:05:44,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1317 transitions, 37677 flow [2023-11-17 12:05:44,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:05:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:05:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 140 transitions. [2023-11-17 12:05:44,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1583710407239819 [2023-11-17 12:05:44,205 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 140 transitions. [2023-11-17 12:05:44,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 140 transitions. [2023-11-17 12:05:44,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:44,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 140 transitions. [2023-11-17 12:05:44,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.235294117647058) internal successors, (140), 17 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:44,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:44,205 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:44,206 INFO L175 Difference]: Start difference. First operand has 471 places, 1278 transitions, 34438 flow. Second operand 17 states and 140 transitions. [2023-11-17 12:05:44,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1317 transitions, 37677 flow [2023-11-17 12:05:46,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1317 transitions, 37343 flow, removed 23 selfloop flow, removed 21 redundant places. [2023-11-17 12:05:46,347 INFO L231 Difference]: Finished difference. Result has 465 places, 1273 transitions, 35004 flow [2023-11-17 12:05:46,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=33675, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=35004, PETRI_PLACES=465, PETRI_TRANSITIONS=1273} [2023-11-17 12:05:46,348 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 442 predicate places. [2023-11-17 12:05:46,348 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 1273 transitions, 35004 flow [2023-11-17 12:05:46,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:46,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:46,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:46,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:46,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:46,552 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 12:05:46,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:46,553 INFO L85 PathProgramCache]: Analyzing trace with hash -183189796, now seen corresponding path program 24 times [2023-11-17 12:05:46,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:46,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761064994] [2023-11-17 12:05:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:46,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:46,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761064994] [2023-11-17 12:05:46,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761064994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:46,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683968414] [2023-11-17 12:05:46,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:05:46,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:46,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:46,765 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 12:05:46,767 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 12:05:47,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:05:47,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:05:47,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:05:47,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:47,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:47,183 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:05:47,183 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 40 treesize of output 56 [2023-11-17 12:05:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:47,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683968414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:05:47,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:05:47,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-11-17 12:05:47,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095605992] [2023-11-17 12:05:47,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:05:47,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:05:47,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:05:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:05:47,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:05:47,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:05:47,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 1273 transitions, 35004 flow. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:47,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:05:47,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:05:47,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:50,818 INFO L124 PetriNetUnfolderBase]: 5324/8534 cut-off events. [2023-11-17 12:05:50,818 INFO L125 PetriNetUnfolderBase]: For 314225/314225 co-relation queries the response was YES. [2023-11-17 12:05:50,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103446 conditions, 8534 events. 5324/8534 cut-off events. For 314225/314225 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 54816 event pairs, 930 based on Foata normal form. 36/8570 useless extension candidates. Maximal degree in co-relation 103309. Up to 6328 conditions per place. [2023-11-17 12:05:50,943 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 836 selfloop transitions, 423 changer transitions 29/1288 dead transitions. [2023-11-17 12:05:50,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1288 transitions, 37551 flow [2023-11-17 12:05:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:05:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:05:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2023-11-17 12:05:50,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1564102564102564 [2023-11-17 12:05:50,944 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 122 transitions. [2023-11-17 12:05:50,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 122 transitions. [2023-11-17 12:05:50,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:50,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 122 transitions. [2023-11-17 12:05:50,945 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 12:05:50,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:50,945 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:50,945 INFO L175 Difference]: Start difference. First operand has 465 places, 1273 transitions, 35004 flow. Second operand 15 states and 122 transitions. [2023-11-17 12:05:50,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1288 transitions, 37551 flow [2023-11-17 12:05:52,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1288 transitions, 36644 flow, removed 52 selfloop flow, removed 14 redundant places. [2023-11-17 12:05:52,863 INFO L231 Difference]: Finished difference. Result has 461 places, 1245 transitions, 33997 flow [2023-11-17 12:05:52,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=34018, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=847, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=33997, PETRI_PLACES=461, PETRI_TRANSITIONS=1245} [2023-11-17 12:05:52,864 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 438 predicate places. [2023-11-17 12:05:52,864 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1245 transitions, 33997 flow [2023-11-17 12:05:52,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:52,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:52,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:52,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2023-11-17 12:05:53,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2023-11-17 12:05:53,065 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 12:05:53,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:53,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1493444840, now seen corresponding path program 25 times [2023-11-17 12:05:53,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:53,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522617090] [2023-11-17 12:05:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:53,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:53,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:53,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522617090] [2023-11-17 12:05:53,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522617090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:53,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124846790] [2023-11-17 12:05:53,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:05:53,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:53,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:53,423 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 12:05:53,424 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 12:05:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:53,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 12:05:53,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:53,719 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:05:53,720 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 26 treesize of output 10 [2023-11-17 12:05:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:05:53,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:53,785 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 12:05:53,785 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 42 treesize of output 60 [2023-11-17 12:05:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:53,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124846790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:05:53,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:05:53,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 20 [2023-11-17 12:05:53,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962943848] [2023-11-17 12:05:53,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:05:53,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:05:53,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:05:53,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:05:53,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:05:53,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:05:53,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1245 transitions, 33997 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 12:05:53,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:05:53,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:05:53,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:57,106 INFO L124 PetriNetUnfolderBase]: 5313/8565 cut-off events. [2023-11-17 12:05:57,107 INFO L125 PetriNetUnfolderBase]: For 312496/312496 co-relation queries the response was YES. [2023-11-17 12:05:57,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102994 conditions, 8565 events. 5313/8565 cut-off events. For 312496/312496 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 55385 event pairs, 1032 based on Foata normal form. 48/8613 useless extension candidates. Maximal degree in co-relation 102860. Up to 6613 conditions per place. [2023-11-17 12:05:57,279 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 979 selfloop transitions, 277 changer transitions 12/1268 dead transitions. [2023-11-17 12:05:57,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 1268 transitions, 36765 flow [2023-11-17 12:05:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:05:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:05:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 103 transitions. [2023-11-17 12:05:57,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15236686390532544 [2023-11-17 12:05:57,280 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 103 transitions. [2023-11-17 12:05:57,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 103 transitions. [2023-11-17 12:05:57,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:57,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 103 transitions. [2023-11-17 12:05:57,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.923076923076923) internal successors, (103), 13 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:57,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 52.0) internal successors, (728), 14 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:57,281 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 52.0) internal successors, (728), 14 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:57,281 INFO L175 Difference]: Start difference. First operand has 461 places, 1245 transitions, 33997 flow. Second operand 13 states and 103 transitions. [2023-11-17 12:05:57,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 1268 transitions, 36765 flow [2023-11-17 12:05:59,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1268 transitions, 35866 flow, removed 7 selfloop flow, removed 13 redundant places. [2023-11-17 12:05:59,295 INFO L231 Difference]: Finished difference. Result has 458 places, 1236 transitions, 33367 flow [2023-11-17 12:05:59,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=32775, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=958, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=33367, PETRI_PLACES=458, PETRI_TRANSITIONS=1236} [2023-11-17 12:05:59,296 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 435 predicate places. [2023-11-17 12:05:59,296 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1236 transitions, 33367 flow [2023-11-17 12:05:59,296 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 12:05:59,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:59,296 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:59,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:59,504 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,SelfDestructingSolverStorable101 [2023-11-17 12:05:59,505 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 12:05:59,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash -304725758, now seen corresponding path program 26 times [2023-11-17 12:05:59,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:59,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946205387] [2023-11-17 12:05:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:05:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946205387] [2023-11-17 12:05:59,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946205387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856256586] [2023-11-17 12:05:59,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:05:59,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:59,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:59,759 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 12:05:59,759 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 12:05:59,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:05:59,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:05:59,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:05:59,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:00,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:00,151 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 12:06:00,151 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 42 treesize of output 60 [2023-11-17 12:06:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:00,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856256586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:00,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:00,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-11-17 12:06:00,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112121888] [2023-11-17 12:06:00,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:00,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:06:00,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:06:00,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:06:00,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:06:00,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1236 transitions, 33367 flow. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:00,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:00,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:06:00,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:03,375 INFO L124 PetriNetUnfolderBase]: 5209/8353 cut-off events. [2023-11-17 12:06:03,375 INFO L125 PetriNetUnfolderBase]: For 300542/300542 co-relation queries the response was YES. [2023-11-17 12:06:03,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99811 conditions, 8353 events. 5209/8353 cut-off events. For 300542/300542 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 53459 event pairs, 1020 based on Foata normal form. 24/8377 useless extension candidates. Maximal degree in co-relation 99675. Up to 6613 conditions per place. [2023-11-17 12:06:03,539 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 970 selfloop transitions, 246 changer transitions 29/1245 dead transitions. [2023-11-17 12:06:03,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1245 transitions, 35865 flow [2023-11-17 12:06:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:06:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:06:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 80 transitions. [2023-11-17 12:06:03,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15384615384615385 [2023-11-17 12:06:03,540 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 80 transitions. [2023-11-17 12:06:03,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 80 transitions. [2023-11-17 12:06:03,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:03,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 80 transitions. [2023-11-17 12:06:03,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:03,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:03,541 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:03,541 INFO L175 Difference]: Start difference. First operand has 458 places, 1236 transitions, 33367 flow. Second operand 10 states and 80 transitions. [2023-11-17 12:06:03,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1245 transitions, 35865 flow [2023-11-17 12:06:05,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1245 transitions, 35543 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-17 12:06:05,535 INFO L231 Difference]: Finished difference. Result has 458 places, 1210 transitions, 32760 flow [2023-11-17 12:06:05,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=33018, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=32760, PETRI_PLACES=458, PETRI_TRANSITIONS=1210} [2023-11-17 12:06:05,536 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 435 predicate places. [2023-11-17 12:06:05,536 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1210 transitions, 32760 flow [2023-11-17 12:06:05,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:05,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:05,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:05,543 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 12:06:05,738 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,SelfDestructingSolverStorable102 [2023-11-17 12:06:05,738 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 12:06:05,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:05,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2013698082, now seen corresponding path program 27 times [2023-11-17 12:06:05,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:05,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716748622] [2023-11-17 12:06:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:05,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:05,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716748622] [2023-11-17 12:06:05,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716748622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:05,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303995634] [2023-11-17 12:06:05,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:06:05,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:05,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:05,947 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 12:06:05,947 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 12:06:06,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:06:06,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:06:06,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:06:06,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:06,257 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:06:06,257 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 30 treesize of output 10 [2023-11-17 12:06:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:06,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:06,307 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:06:06,307 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 40 treesize of output 56 [2023-11-17 12:06:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:06:06,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303995634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:06,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:06,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 22 [2023-11-17 12:06:06,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489641797] [2023-11-17 12:06:06,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:06,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:06:06,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:06:06,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:06:06,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:06:06,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1210 transitions, 32760 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 12:06:06,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:06,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:06:06,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:09,901 INFO L124 PetriNetUnfolderBase]: 5347/8531 cut-off events. [2023-11-17 12:06:09,901 INFO L125 PetriNetUnfolderBase]: For 328133/328133 co-relation queries the response was YES. [2023-11-17 12:06:09,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102864 conditions, 8531 events. 5347/8531 cut-off events. For 328133/328133 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 54159 event pairs, 1251 based on Foata normal form. 52/8583 useless extension candidates. Maximal degree in co-relation 102728. Up to 7667 conditions per place. [2023-11-17 12:06:10,027 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 1047 selfloop transitions, 205 changer transitions 43/1295 dead transitions. [2023-11-17 12:06:10,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 1295 transitions, 37606 flow [2023-11-17 12:06:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:06:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:06:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 150 transitions. [2023-11-17 12:06:10,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15182186234817813 [2023-11-17 12:06:10,029 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 150 transitions. [2023-11-17 12:06:10,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 150 transitions. [2023-11-17 12:06:10,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:10,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 150 transitions. [2023-11-17 12:06:10,029 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 12:06:10,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:10,030 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:10,030 INFO L175 Difference]: Start difference. First operand has 458 places, 1210 transitions, 32760 flow. Second operand 19 states and 150 transitions. [2023-11-17 12:06:10,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 1295 transitions, 37606 flow [2023-11-17 12:06:12,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1295 transitions, 36859 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-11-17 12:06:12,207 INFO L231 Difference]: Finished difference. Result has 463 places, 1223 transitions, 33100 flow [2023-11-17 12:06:12,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=31773, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=33100, PETRI_PLACES=463, PETRI_TRANSITIONS=1223} [2023-11-17 12:06:12,208 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 440 predicate places. [2023-11-17 12:06:12,208 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 1223 transitions, 33100 flow [2023-11-17 12:06:12,209 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 12:06:12,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:12,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:12,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2023-11-17 12:06:12,413 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,SelfDestructingSolverStorable103 [2023-11-17 12:06:12,413 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 12:06:12,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash 327818456, now seen corresponding path program 28 times [2023-11-17 12:06:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:12,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473464269] [2023-11-17 12:06:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:12,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:12,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:12,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473464269] [2023-11-17 12:06:12,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473464269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:12,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489779558] [2023-11-17 12:06:12,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:06:12,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:12,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:12,655 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 12:06:12,656 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 12:06:12,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:06:12,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:06:12,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:06:12,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:12,929 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:06:12,930 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 34 treesize of output 10 [2023-11-17 12:06:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:12,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:12,993 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 12:06:12,993 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 42 treesize of output 60 [2023-11-17 12:06:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:13,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489779558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:13,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:13,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-11-17 12:06:13,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997428172] [2023-11-17 12:06:13,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:13,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:06:13,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:13,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:06:13,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:06:13,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:06:13,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1223 transitions, 33100 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:13,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:13,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:06:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:16,633 INFO L124 PetriNetUnfolderBase]: 5429/8681 cut-off events. [2023-11-17 12:06:16,633 INFO L125 PetriNetUnfolderBase]: For 336481/336481 co-relation queries the response was YES. [2023-11-17 12:06:16,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106349 conditions, 8681 events. 5429/8681 cut-off events. For 336481/336481 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 55429 event pairs, 1263 based on Foata normal form. 36/8717 useless extension candidates. Maximal degree in co-relation 106210. Up to 7719 conditions per place. [2023-11-17 12:06:16,780 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 1061 selfloop transitions, 234 changer transitions 28/1323 dead transitions. [2023-11-17 12:06:16,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1323 transitions, 38857 flow [2023-11-17 12:06:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:06:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:06:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 126 transitions. [2023-11-17 12:06:16,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15144230769230768 [2023-11-17 12:06:16,781 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 126 transitions. [2023-11-17 12:06:16,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 126 transitions. [2023-11-17 12:06:16,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:16,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 126 transitions. [2023-11-17 12:06:16,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:16,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:16,782 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:16,782 INFO L175 Difference]: Start difference. First operand has 463 places, 1223 transitions, 33100 flow. Second operand 16 states and 126 transitions. [2023-11-17 12:06:16,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1323 transitions, 38857 flow [2023-11-17 12:06:19,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1323 transitions, 38224 flow, removed 154 selfloop flow, removed 12 redundant places. [2023-11-17 12:06:19,335 INFO L231 Difference]: Finished difference. Result has 466 places, 1251 transitions, 34012 flow [2023-11-17 12:06:19,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=32533, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1001, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=34012, PETRI_PLACES=466, PETRI_TRANSITIONS=1251} [2023-11-17 12:06:19,336 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 443 predicate places. [2023-11-17 12:06:19,336 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 1251 transitions, 34012 flow [2023-11-17 12:06:19,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:19,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:19,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:19,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2023-11-17 12:06:19,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:19,543 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 12:06:19,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:19,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1207621660, now seen corresponding path program 29 times [2023-11-17 12:06:19,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:19,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199793239] [2023-11-17 12:06:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:19,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:19,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:19,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199793239] [2023-11-17 12:06:19,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199793239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:19,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834001882] [2023-11-17 12:06:19,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:06:19,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:19,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:19,790 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 12:06:19,791 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 12:06:20,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:06:20,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:06:20,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 12:06:20,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:20,103 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:06:20,103 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 10 [2023-11-17 12:06:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:06:20,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:20,155 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:06:20,156 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 40 treesize of output 56 [2023-11-17 12:06:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:20,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834001882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:20,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:20,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 19 [2023-11-17 12:06:20,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476818269] [2023-11-17 12:06:20,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:20,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:06:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:20,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:06:20,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:06:20,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:06:20,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1251 transitions, 34012 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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 12:06:20,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:20,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:06:20,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:24,114 INFO L124 PetriNetUnfolderBase]: 5318/8574 cut-off events. [2023-11-17 12:06:24,114 INFO L125 PetriNetUnfolderBase]: For 341724/341724 co-relation queries the response was YES. [2023-11-17 12:06:24,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105421 conditions, 8574 events. 5318/8574 cut-off events. For 341724/341724 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 55242 event pairs, 1311 based on Foata normal form. 56/8630 useless extension candidates. Maximal degree in co-relation 105280. Up to 7855 conditions per place. [2023-11-17 12:06:24,245 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 1068 selfloop transitions, 162 changer transitions 26/1256 dead transitions. [2023-11-17 12:06:24,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1256 transitions, 36118 flow [2023-11-17 12:06:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:06:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:06:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 122 transitions. [2023-11-17 12:06:24,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1466346153846154 [2023-11-17 12:06:24,246 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 122 transitions. [2023-11-17 12:06:24,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 122 transitions. [2023-11-17 12:06:24,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:24,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 122 transitions. [2023-11-17 12:06:24,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.625) internal successors, (122), 16 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:24,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:24,247 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:24,248 INFO L175 Difference]: Start difference. First operand has 466 places, 1251 transitions, 34012 flow. Second operand 16 states and 122 transitions. [2023-11-17 12:06:24,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1256 transitions, 36118 flow [2023-11-17 12:06:26,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1256 transitions, 35571 flow, removed 102 selfloop flow, removed 13 redundant places. [2023-11-17 12:06:26,743 INFO L231 Difference]: Finished difference. Result has 466 places, 1210 transitions, 32627 flow [2023-11-17 12:06:26,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=32520, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1062, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=32627, PETRI_PLACES=466, PETRI_TRANSITIONS=1210} [2023-11-17 12:06:26,745 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 443 predicate places. [2023-11-17 12:06:26,745 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 1210 transitions, 32627 flow [2023-11-17 12:06:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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 12:06:26,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:26,745 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:26,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2023-11-17 12:06:26,952 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,SelfDestructingSolverStorable105 [2023-11-17 12:06:26,953 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 12:06:26,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:26,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1859865704, now seen corresponding path program 30 times [2023-11-17 12:06:26,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:26,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262933648] [2023-11-17 12:06:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:26,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:27,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:27,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262933648] [2023-11-17 12:06:27,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262933648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:27,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408766478] [2023-11-17 12:06:27,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:06:27,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:27,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:27,222 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 12:06:27,222 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 12:06:27,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:06:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:06:27,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:06:27,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:27,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:27,639 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 12:06:27,639 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 42 treesize of output 60 [2023-11-17 12:06:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:27,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408766478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:27,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:27,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-11-17 12:06:27,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096906774] [2023-11-17 12:06:27,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:27,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:06:27,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:06:27,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:06:27,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:06:27,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1210 transitions, 32627 flow. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 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 12:06:27,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:27,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:06:27,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:31,333 INFO L124 PetriNetUnfolderBase]: 5398/8722 cut-off events. [2023-11-17 12:06:31,333 INFO L125 PetriNetUnfolderBase]: For 371381/371381 co-relation queries the response was YES. [2023-11-17 12:06:31,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107864 conditions, 8722 events. 5398/8722 cut-off events. For 371381/371381 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 56417 event pairs, 1284 based on Foata normal form. 72/8794 useless extension candidates. Maximal degree in co-relation 107725. Up to 7838 conditions per place. [2023-11-17 12:06:31,606 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 1070 selfloop transitions, 197 changer transitions 9/1276 dead transitions. [2023-11-17 12:06:31,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1276 transitions, 36410 flow [2023-11-17 12:06:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:06:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:06:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 150 transitions. [2023-11-17 12:06:31,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14423076923076922 [2023-11-17 12:06:31,608 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 150 transitions. [2023-11-17 12:06:31,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 150 transitions. [2023-11-17 12:06:31,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:31,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 150 transitions. [2023-11-17 12:06:31,608 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 12:06:31,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 52.0) internal successors, (1092), 21 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:31,609 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 52.0) internal successors, (1092), 21 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:31,609 INFO L175 Difference]: Start difference. First operand has 466 places, 1210 transitions, 32627 flow. Second operand 20 states and 150 transitions. [2023-11-17 12:06:31,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1276 transitions, 36410 flow [2023-11-17 12:06:33,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1276 transitions, 35870 flow, removed 98 selfloop flow, removed 14 redundant places. [2023-11-17 12:06:33,927 INFO L231 Difference]: Finished difference. Result has 475 places, 1236 transitions, 33435 flow [2023-11-17 12:06:33,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=32097, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1023, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=33435, PETRI_PLACES=475, PETRI_TRANSITIONS=1236} [2023-11-17 12:06:33,928 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 452 predicate places. [2023-11-17 12:06:33,928 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 1236 transitions, 33435 flow [2023-11-17 12:06:33,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 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 12:06:33,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:33,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:33,936 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 12:06:34,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:34,129 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 12:06:34,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1226974528, now seen corresponding path program 31 times [2023-11-17 12:06:34,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:34,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516330441] [2023-11-17 12:06:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:34,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:34,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:34,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516330441] [2023-11-17 12:06:34,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516330441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:34,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566869703] [2023-11-17 12:06:34,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:06:34,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:34,471 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 12:06:34,491 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 12:06:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:34,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 12:06:34,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:34,880 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:06:34,881 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 30 treesize of output 10 [2023-11-17 12:06:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:06:34,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:34,950 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 12:06:34,950 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 42 treesize of output 60 [2023-11-17 12:06:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:34,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566869703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:34,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:34,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 8] total 25 [2023-11-17 12:06:34,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684129276] [2023-11-17 12:06:34,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:34,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:06:34,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:06:34,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:06:34,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:06:34,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 1236 transitions, 33435 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 12:06:34,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:34,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:06:34,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:38,738 INFO L124 PetriNetUnfolderBase]: 5323/8647 cut-off events. [2023-11-17 12:06:38,739 INFO L125 PetriNetUnfolderBase]: For 373170/373170 co-relation queries the response was YES. [2023-11-17 12:06:38,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107002 conditions, 8647 events. 5323/8647 cut-off events. For 373170/373170 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 56238 event pairs, 1290 based on Foata normal form. 36/8683 useless extension candidates. Maximal degree in co-relation 106856. Up to 7730 conditions per place. [2023-11-17 12:06:38,975 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 1056 selfloop transitions, 173 changer transitions 19/1248 dead transitions. [2023-11-17 12:06:38,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 1248 transitions, 35527 flow [2023-11-17 12:06:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:06:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:06:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 133 transitions. [2023-11-17 12:06:38,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1420940170940171 [2023-11-17 12:06:38,976 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 133 transitions. [2023-11-17 12:06:38,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 133 transitions. [2023-11-17 12:06:38,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:38,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 133 transitions. [2023-11-17 12:06:38,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.388888888888889) internal successors, (133), 18 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 12:06:38,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 52.0) internal successors, (988), 19 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:38,977 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 52.0) internal successors, (988), 19 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:38,977 INFO L175 Difference]: Start difference. First operand has 475 places, 1236 transitions, 33435 flow. Second operand 18 states and 133 transitions. [2023-11-17 12:06:38,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 1248 transitions, 35527 flow [2023-11-17 12:06:41,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 1248 transitions, 35117 flow, removed 108 selfloop flow, removed 10 redundant places. [2023-11-17 12:06:41,425 INFO L231 Difference]: Finished difference. Result has 481 places, 1205 transitions, 32261 flow [2023-11-17 12:06:41,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=32418, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=32261, PETRI_PLACES=481, PETRI_TRANSITIONS=1205} [2023-11-17 12:06:41,426 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 458 predicate places. [2023-11-17 12:06:41,458 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 1205 transitions, 32261 flow [2023-11-17 12:06:41,458 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 12:06:41,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:41,458 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:41,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2023-11-17 12:06:41,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:41,659 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 12:06:41,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:41,659 INFO L85 PathProgramCache]: Analyzing trace with hash -347316906, now seen corresponding path program 32 times [2023-11-17 12:06:41,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:41,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119006833] [2023-11-17 12:06:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:41,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:41,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:41,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119006833] [2023-11-17 12:06:41,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119006833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489488761] [2023-11-17 12:06:41,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:06:41,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:41,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:41,917 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 12:06:41,917 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 12:06:42,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:06:42,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:06:42,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:06:42,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:42,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:42,374 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 12:06:42,374 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 42 treesize of output 60 [2023-11-17 12:06:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:42,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489488761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:42,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:42,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-11-17 12:06:42,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375092509] [2023-11-17 12:06:42,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:42,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:06:42,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:42,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:06:42,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:06:42,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:06:42,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 1205 transitions, 32261 flow. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:42,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:42,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:06:42,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:46,038 INFO L124 PetriNetUnfolderBase]: 5193/8379 cut-off events. [2023-11-17 12:06:46,038 INFO L125 PetriNetUnfolderBase]: For 343361/343361 co-relation queries the response was YES. [2023-11-17 12:06:46,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102857 conditions, 8379 events. 5193/8379 cut-off events. For 343361/343361 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 53817 event pairs, 1296 based on Foata normal form. 36/8415 useless extension candidates. Maximal degree in co-relation 102712. Up to 7760 conditions per place. [2023-11-17 12:06:46,183 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 1053 selfloop transitions, 146 changer transitions 22/1221 dead transitions. [2023-11-17 12:06:46,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1221 transitions, 34645 flow [2023-11-17 12:06:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:06:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:06:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 114 transitions. [2023-11-17 12:06:46,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14615384615384616 [2023-11-17 12:06:46,184 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 114 transitions. [2023-11-17 12:06:46,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 114 transitions. [2023-11-17 12:06:46,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:46,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 114 transitions. [2023-11-17 12:06:46,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.6) internal successors, (114), 15 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 12:06:46,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:46,185 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:46,185 INFO L175 Difference]: Start difference. First operand has 481 places, 1205 transitions, 32261 flow. Second operand 15 states and 114 transitions. [2023-11-17 12:06:46,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1221 transitions, 34645 flow [2023-11-17 12:06:48,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1221 transitions, 34277 flow, removed 14 selfloop flow, removed 17 redundant places. [2023-11-17 12:06:48,671 INFO L231 Difference]: Finished difference. Result has 474 places, 1185 transitions, 31625 flow [2023-11-17 12:06:48,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=31778, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1054, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=31625, PETRI_PLACES=474, PETRI_TRANSITIONS=1185} [2023-11-17 12:06:48,672 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 451 predicate places. [2023-11-17 12:06:48,672 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 1185 transitions, 31625 flow [2023-11-17 12:06:48,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:48,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:48,672 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:48,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2023-11-17 12:06:48,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:48,879 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 12:06:48,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash -260663490, now seen corresponding path program 33 times [2023-11-17 12:06:48,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:48,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754198237] [2023-11-17 12:06:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:48,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:06:49,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:49,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754198237] [2023-11-17 12:06:49,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754198237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703063358] [2023-11-17 12:06:49,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:06:49,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:49,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:49,375 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 12:06:49,375 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 12:06:49,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:06:49,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:06:49,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-17 12:06:49,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:49,644 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 10 treesize of output 8 [2023-11-17 12:06:49,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:06:49,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 8 treesize of output 1 [2023-11-17 12:06:49,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:06:49,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:06:49,939 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:06:49,939 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 23 treesize of output 21 [2023-11-17 12:06:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:06:50,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:50,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:06:50,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2023-11-17 12:06:50,595 INFO L349 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2023-11-17 12:06:50,596 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 504 treesize of output 473 [2023-11-17 12:06:50,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:06:50,615 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 358 treesize of output 271 [2023-11-17 12:06:50,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:06:50,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 320 treesize of output 316 [2023-11-17 12:06:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:06:51,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703063358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:51,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:51,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 38 [2023-11-17 12:06:51,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869189435] [2023-11-17 12:06:51,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:51,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 12:06:51,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 12:06:51,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1321, Unknown=4, NotChecked=0, Total=1482 [2023-11-17 12:06:51,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:06:51,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 1185 transitions, 31625 flow. Second operand has 39 states, 39 states have (on average 4.512820512820513) internal successors, (176), 39 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 12:06:51,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:51,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:06:51,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:55,691 INFO L124 PetriNetUnfolderBase]: 5157/8287 cut-off events. [2023-11-17 12:06:55,692 INFO L125 PetriNetUnfolderBase]: For 344169/344169 co-relation queries the response was YES. [2023-11-17 12:06:55,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101708 conditions, 8287 events. 5157/8287 cut-off events. For 344169/344169 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 52692 event pairs, 1310 based on Foata normal form. 18/8305 useless extension candidates. Maximal degree in co-relation 101565. Up to 5788 conditions per place. [2023-11-17 12:06:55,825 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 1297 selfloop transitions, 125 changer transitions 8/1430 dead transitions. [2023-11-17 12:06:55,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1430 transitions, 38357 flow [2023-11-17 12:06:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:06:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:06:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 157 transitions. [2023-11-17 12:06:55,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15890688259109312 [2023-11-17 12:06:55,827 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 157 transitions. [2023-11-17 12:06:55,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 157 transitions. [2023-11-17 12:06:55,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:55,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 157 transitions. [2023-11-17 12:06:55,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.263157894736842) internal successors, (157), 19 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:55,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:55,828 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:55,828 INFO L175 Difference]: Start difference. First operand has 474 places, 1185 transitions, 31625 flow. Second operand 19 states and 157 transitions. [2023-11-17 12:06:55,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1430 transitions, 38357 flow [2023-11-17 12:06:58,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 1430 transitions, 37975 flow, removed 21 selfloop flow, removed 14 redundant places. [2023-11-17 12:06:58,290 INFO L231 Difference]: Finished difference. Result has 480 places, 1192 transitions, 31855 flow [2023-11-17 12:06:58,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=31301, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1062, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=31855, PETRI_PLACES=480, PETRI_TRANSITIONS=1192} [2023-11-17 12:06:58,291 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 457 predicate places. [2023-11-17 12:06:58,291 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 1192 transitions, 31855 flow [2023-11-17 12:06:58,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.512820512820513) internal successors, (176), 39 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 12:06:58,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:58,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:58,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2023-11-17 12:06:58,491 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,SelfDestructingSolverStorable109 [2023-11-17 12:06:58,492 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 12:06:58,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:58,492 INFO L85 PathProgramCache]: Analyzing trace with hash -824041304, now seen corresponding path program 34 times [2023-11-17 12:06:58,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:58,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540550980] [2023-11-17 12:06:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:58,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:06:58,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:58,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540550980] [2023-11-17 12:06:58,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540550980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:58,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628699052] [2023-11-17 12:06:58,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:06:58,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:58,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:58,982 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 12:06:58,983 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 12:06:59,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:06:59,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:06:59,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 12:06:59,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:59,237 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 39 treesize of output 37 [2023-11-17 12:06:59,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:06:59,399 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:06:59,399 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 25 treesize of output 23 [2023-11-17 12:06:59,477 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:06:59,477 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 30 treesize of output 10 [2023-11-17 12:06:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:06:59,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:59,641 INFO L349 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2023-11-17 12:06:59,642 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 106 treesize of output 123 [2023-11-17 12:06:59,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:06:59,650 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 62 treesize of output 55 [2023-11-17 12:06:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:06:59,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628699052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:59,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:59,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 33 [2023-11-17 12:06:59,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842067161] [2023-11-17 12:06:59,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:59,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:06:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:59,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:06:59,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=993, Unknown=4, NotChecked=0, Total=1122 [2023-11-17 12:06:59,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:06:59,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 1192 transitions, 31855 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 12:06:59,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:59,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:06:59,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:04,361 INFO L124 PetriNetUnfolderBase]: 5125/8239 cut-off events. [2023-11-17 12:07:04,361 INFO L125 PetriNetUnfolderBase]: For 354088/354088 co-relation queries the response was YES. [2023-11-17 12:07:04,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101298 conditions, 8239 events. 5125/8239 cut-off events. For 354088/354088 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 52521 event pairs, 990 based on Foata normal form. 24/8263 useless extension candidates. Maximal degree in co-relation 101147. Up to 4267 conditions per place. [2023-11-17 12:07:04,473 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 1206 selfloop transitions, 247 changer transitions 22/1475 dead transitions. [2023-11-17 12:07:04,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1475 transitions, 38983 flow [2023-11-17 12:07:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:07:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:07:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 242 transitions. [2023-11-17 12:07:04,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15512820512820513 [2023-11-17 12:07:04,474 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 242 transitions. [2023-11-17 12:07:04,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 242 transitions. [2023-11-17 12:07:04,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:04,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 242 transitions. [2023-11-17 12:07:04,475 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 12:07:04,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 52.0) internal successors, (1612), 31 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:04,476 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 52.0) internal successors, (1612), 31 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:04,476 INFO L175 Difference]: Start difference. First operand has 480 places, 1192 transitions, 31855 flow. Second operand 30 states and 242 transitions. [2023-11-17 12:07:04,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1475 transitions, 38983 flow [2023-11-17 12:07:06,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1475 transitions, 38720 flow, removed 58 selfloop flow, removed 12 redundant places. [2023-11-17 12:07:06,622 INFO L231 Difference]: Finished difference. Result has 498 places, 1179 transitions, 31786 flow [2023-11-17 12:07:06,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=31262, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=31786, PETRI_PLACES=498, PETRI_TRANSITIONS=1179} [2023-11-17 12:07:06,623 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 475 predicate places. [2023-11-17 12:07:06,623 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1179 transitions, 31786 flow [2023-11-17 12:07:06,623 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 12:07:06,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:06,623 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:06,630 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 12:07:06,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:06,824 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 12:07:06,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:06,824 INFO L85 PathProgramCache]: Analyzing trace with hash -938367650, now seen corresponding path program 35 times [2023-11-17 12:07:06,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:06,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023591759] [2023-11-17 12:07:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:06,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:07:07,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:07,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023591759] [2023-11-17 12:07:07,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023591759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:07,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030287324] [2023-11-17 12:07:07,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:07:07,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:07,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:07,322 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 12:07:07,322 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 12:07:07,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:07:07,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:07,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 12:07:07,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:07,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:07:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:07:07,785 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:07:07,785 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 23 treesize of output 21 [2023-11-17 12:07:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:07:07,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:08,084 INFO L349 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2023-11-17 12:07:08,085 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 106 treesize of output 123 [2023-11-17 12:07:08,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:07:08,094 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 62 treesize of output 55 [2023-11-17 12:07:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:08,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030287324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:08,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:08,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 36 [2023-11-17 12:07:08,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374245728] [2023-11-17 12:07:08,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:08,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 12:07:08,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 12:07:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1190, Unknown=6, NotChecked=0, Total=1332 [2023-11-17 12:07:08,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:07:08,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1179 transitions, 31786 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 12:07:08,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:08,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:07:08,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:12,520 INFO L124 PetriNetUnfolderBase]: 5067/8133 cut-off events. [2023-11-17 12:07:12,520 INFO L125 PetriNetUnfolderBase]: For 342561/342561 co-relation queries the response was YES. [2023-11-17 12:07:12,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100245 conditions, 8133 events. 5067/8133 cut-off events. For 342561/342561 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 51537 event pairs, 978 based on Foata normal form. 24/8157 useless extension candidates. Maximal degree in co-relation 100094. Up to 5085 conditions per place. [2023-11-17 12:07:12,630 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 988 selfloop transitions, 223 changer transitions 32/1243 dead transitions. [2023-11-17 12:07:12,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1243 transitions, 34751 flow [2023-11-17 12:07:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:07:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:07:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 202 transitions. [2023-11-17 12:07:12,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14940828402366865 [2023-11-17 12:07:12,631 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 202 transitions. [2023-11-17 12:07:12,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 202 transitions. [2023-11-17 12:07:12,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:12,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 202 transitions. [2023-11-17 12:07:12,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 7.769230769230769) internal successors, (202), 26 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:12,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 52.0) internal successors, (1404), 27 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:12,633 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 52.0) internal successors, (1404), 27 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:12,633 INFO L175 Difference]: Start difference. First operand has 498 places, 1179 transitions, 31786 flow. Second operand 26 states and 202 transitions. [2023-11-17 12:07:12,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 1243 transitions, 34751 flow [2023-11-17 12:07:14,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1243 transitions, 34266 flow, removed 23 selfloop flow, removed 22 redundant places. [2023-11-17 12:07:14,675 INFO L231 Difference]: Finished difference. Result has 492 places, 1155 transitions, 31210 flow [2023-11-17 12:07:14,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=31191, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=31210, PETRI_PLACES=492, PETRI_TRANSITIONS=1155} [2023-11-17 12:07:14,676 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 469 predicate places. [2023-11-17 12:07:14,676 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 1155 transitions, 31210 flow [2023-11-17 12:07:14,676 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 12:07:14,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:14,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:14,684 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 12:07:14,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:14,877 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 12:07:14,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash -677927820, now seen corresponding path program 36 times [2023-11-17 12:07:14,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:14,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428311194] [2023-11-17 12:07:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:15,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:15,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428311194] [2023-11-17 12:07:15,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428311194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:15,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661960711] [2023-11-17 12:07:15,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:07:15,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:15,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:15,099 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 12:07:15,099 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 12:07:15,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:07:15,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:15,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:07:15,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:15,421 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:07:15,421 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 30 treesize of output 10 [2023-11-17 12:07:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:15,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:15,478 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 12:07:15,479 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 42 treesize of output 60 [2023-11-17 12:07:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:15,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661960711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:15,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:15,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-17 12:07:15,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817389639] [2023-11-17 12:07:15,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:15,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:07:15,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:07:15,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:07:15,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:07:15,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1155 transitions, 31210 flow. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:15,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:15,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:07:15,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:18,570 INFO L124 PetriNetUnfolderBase]: 4994/7995 cut-off events. [2023-11-17 12:07:18,570 INFO L125 PetriNetUnfolderBase]: For 322330/322330 co-relation queries the response was YES. [2023-11-17 12:07:18,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98382 conditions, 7995 events. 4994/7995 cut-off events. For 322330/322330 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 50318 event pairs, 764 based on Foata normal form. 24/8019 useless extension candidates. Maximal degree in co-relation 98236. Up to 5298 conditions per place. [2023-11-17 12:07:18,672 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 973 selfloop transitions, 195 changer transitions 22/1190 dead transitions. [2023-11-17 12:07:18,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1190 transitions, 34148 flow [2023-11-17 12:07:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:07:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:07:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 89 transitions. [2023-11-17 12:07:18,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1555944055944056 [2023-11-17 12:07:18,673 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 89 transitions. [2023-11-17 12:07:18,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 89 transitions. [2023-11-17 12:07:18,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:18,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 89 transitions. [2023-11-17 12:07:18,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:18,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 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 12:07:18,674 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 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 12:07:18,674 INFO L175 Difference]: Start difference. First operand has 492 places, 1155 transitions, 31210 flow. Second operand 11 states and 89 transitions. [2023-11-17 12:07:18,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1190 transitions, 34148 flow [2023-11-17 12:07:20,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1190 transitions, 33586 flow, removed 10 selfloop flow, removed 25 redundant places. [2023-11-17 12:07:20,568 INFO L231 Difference]: Finished difference. Result has 465 places, 1139 transitions, 30546 flow [2023-11-17 12:07:20,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=30324, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=30546, PETRI_PLACES=465, PETRI_TRANSITIONS=1139} [2023-11-17 12:07:20,569 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 442 predicate places. [2023-11-17 12:07:20,569 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 1139 transitions, 30546 flow [2023-11-17 12:07:20,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:20,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:20,569 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:20,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2023-11-17 12:07:20,769 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,SelfDestructingSolverStorable112 [2023-11-17 12:07:20,770 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 12:07:20,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash 469794920, now seen corresponding path program 37 times [2023-11-17 12:07:20,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:20,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987519348] [2023-11-17 12:07:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:21,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:21,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987519348] [2023-11-17 12:07:21,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987519348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:21,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062905968] [2023-11-17 12:07:21,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:07:21,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:21,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:21,080 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 12:07:21,080 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 12:07:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:21,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:07:21,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:21,409 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:07:21,409 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 30 treesize of output 10 [2023-11-17 12:07:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:07:21,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:21,460 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:07:21,461 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 40 treesize of output 56 [2023-11-17 12:07:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:07:21,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062905968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:21,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:21,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 23 [2023-11-17 12:07:21,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468917756] [2023-11-17 12:07:21,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:21,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:07:21,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:21,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:07:21,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:07:21,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:07:21,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 1139 transitions, 30546 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:21,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:21,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:07:21,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:24,589 INFO L124 PetriNetUnfolderBase]: 5154/8247 cut-off events. [2023-11-17 12:07:24,590 INFO L125 PetriNetUnfolderBase]: For 343483/343483 co-relation queries the response was YES. [2023-11-17 12:07:24,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103780 conditions, 8247 events. 5154/8247 cut-off events. For 343483/343483 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 52055 event pairs, 1147 based on Foata normal form. 36/8283 useless extension candidates. Maximal degree in co-relation 103635. Up to 7149 conditions per place. [2023-11-17 12:07:24,700 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 1040 selfloop transitions, 165 changer transitions 20/1225 dead transitions. [2023-11-17 12:07:24,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1225 transitions, 35920 flow [2023-11-17 12:07:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:07:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:07:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2023-11-17 12:07:24,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1564102564102564 [2023-11-17 12:07:24,702 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 122 transitions. [2023-11-17 12:07:24,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 122 transitions. [2023-11-17 12:07:24,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:24,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 122 transitions. [2023-11-17 12:07:24,702 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 12:07:24,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:24,703 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:24,703 INFO L175 Difference]: Start difference. First operand has 465 places, 1139 transitions, 30546 flow. Second operand 15 states and 122 transitions. [2023-11-17 12:07:24,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1225 transitions, 35920 flow [2023-11-17 12:07:26,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1225 transitions, 35478 flow, removed 35 selfloop flow, removed 9 redundant places. [2023-11-17 12:07:26,797 INFO L231 Difference]: Finished difference. Result has 472 places, 1181 transitions, 32723 flow [2023-11-17 12:07:26,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=30116, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=32723, PETRI_PLACES=472, PETRI_TRANSITIONS=1181} [2023-11-17 12:07:26,798 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 449 predicate places. [2023-11-17 12:07:26,798 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1181 transitions, 32723 flow [2023-11-17 12:07:26,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:26,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:26,798 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:26,804 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 12:07:27,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2023-11-17 12:07:27,004 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 12:07:27,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1498086182, now seen corresponding path program 38 times [2023-11-17 12:07:27,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:27,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614089461] [2023-11-17 12:07:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:27,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:27,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:27,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614089461] [2023-11-17 12:07:27,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614089461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:27,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434131213] [2023-11-17 12:07:27,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:07:27,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:27,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:27,240 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 12:07:27,241 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 12:07:27,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:07:27,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:27,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:07:27,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:27,574 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:07:27,574 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 30 treesize of output 10 [2023-11-17 12:07:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:27,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:27,624 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:07:27,625 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 40 treesize of output 56 [2023-11-17 12:07:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:27,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434131213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:27,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:27,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 22 [2023-11-17 12:07:27,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393162952] [2023-11-17 12:07:27,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:27,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:07:27,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:07:27,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:07:27,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:07:27,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1181 transitions, 32723 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 12:07:27,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:27,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:07:27,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:31,084 INFO L124 PetriNetUnfolderBase]: 5332/8505 cut-off events. [2023-11-17 12:07:31,085 INFO L125 PetriNetUnfolderBase]: For 380339/380339 co-relation queries the response was YES. [2023-11-17 12:07:31,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109589 conditions, 8505 events. 5332/8505 cut-off events. For 380339/380339 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 53684 event pairs, 1152 based on Foata normal form. 36/8541 useless extension candidates. Maximal degree in co-relation 109442. Up to 7226 conditions per place. [2023-11-17 12:07:31,211 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 1056 selfloop transitions, 202 changer transitions 26/1284 dead transitions. [2023-11-17 12:07:31,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1284 transitions, 38640 flow [2023-11-17 12:07:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:07:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:07:31,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2023-11-17 12:07:31,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1564102564102564 [2023-11-17 12:07:31,211 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 122 transitions. [2023-11-17 12:07:31,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 122 transitions. [2023-11-17 12:07:31,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:31,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 122 transitions. [2023-11-17 12:07:31,212 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 12:07:31,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:31,213 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 52.0) internal successors, (832), 16 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:31,213 INFO L175 Difference]: Start difference. First operand has 472 places, 1181 transitions, 32723 flow. Second operand 15 states and 122 transitions. [2023-11-17 12:07:31,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1284 transitions, 38640 flow [2023-11-17 12:07:33,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 1284 transitions, 37325 flow, removed 590 selfloop flow, removed 8 redundant places. [2023-11-17 12:07:33,575 INFO L231 Difference]: Finished difference. Result has 479 places, 1214 transitions, 33377 flow [2023-11-17 12:07:33,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=31432, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=979, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=33377, PETRI_PLACES=479, PETRI_TRANSITIONS=1214} [2023-11-17 12:07:33,576 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 456 predicate places. [2023-11-17 12:07:33,576 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1214 transitions, 33377 flow [2023-11-17 12:07:33,576 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 12:07:33,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:33,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:33,584 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 12:07:33,776 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,SelfDestructingSolverStorable114 [2023-11-17 12:07:33,776 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 12:07:33,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:33,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1417276994, now seen corresponding path program 39 times [2023-11-17 12:07:33,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:33,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711924533] [2023-11-17 12:07:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:33,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:33,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:33,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711924533] [2023-11-17 12:07:33,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711924533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:33,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931886798] [2023-11-17 12:07:33,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:07:33,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:33,972 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 12:07:33,973 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 12:07:34,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:07:34,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:34,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:07:34,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:34,304 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:07:34,304 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 30 treesize of output 10 [2023-11-17 12:07:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:34,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:34,352 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:07:34,353 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 40 treesize of output 56 [2023-11-17 12:07:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:34,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931886798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:34,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:34,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-17 12:07:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471361697] [2023-11-17 12:07:34,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:34,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:07:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:07:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:07:34,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:07:34,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1214 transitions, 33377 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:34,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:34,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:07:34,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:38,607 INFO L124 PetriNetUnfolderBase]: 5526/8815 cut-off events. [2023-11-17 12:07:38,607 INFO L125 PetriNetUnfolderBase]: For 417246/417246 co-relation queries the response was YES. [2023-11-17 12:07:38,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114014 conditions, 8815 events. 5526/8815 cut-off events. For 417246/417246 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 56041 event pairs, 789 based on Foata normal form. 70/8885 useless extension candidates. Maximal degree in co-relation 113864. Up to 5485 conditions per place. [2023-11-17 12:07:38,754 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 922 selfloop transitions, 381 changer transitions 57/1360 dead transitions. [2023-11-17 12:07:38,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 1360 transitions, 40555 flow [2023-11-17 12:07:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:07:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:07:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 163 transitions. [2023-11-17 12:07:38,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.15673076923076923 [2023-11-17 12:07:38,755 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 163 transitions. [2023-11-17 12:07:38,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 163 transitions. [2023-11-17 12:07:38,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:38,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 163 transitions. [2023-11-17 12:07:38,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.15) internal successors, (163), 20 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:38,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 52.0) internal successors, (1092), 21 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:38,757 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 52.0) internal successors, (1092), 21 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:38,757 INFO L175 Difference]: Start difference. First operand has 479 places, 1214 transitions, 33377 flow. Second operand 20 states and 163 transitions. [2023-11-17 12:07:38,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 1360 transitions, 40555 flow [2023-11-17 12:07:41,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 1360 transitions, 39845 flow, removed 179 selfloop flow, removed 13 redundant places. [2023-11-17 12:07:41,568 INFO L231 Difference]: Finished difference. Result has 489 places, 1244 transitions, 35093 flow [2023-11-17 12:07:41,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=32699, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=833, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=35093, PETRI_PLACES=489, PETRI_TRANSITIONS=1244} [2023-11-17 12:07:41,569 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 466 predicate places. [2023-11-17 12:07:41,570 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 1244 transitions, 35093 flow [2023-11-17 12:07:41,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:41,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:41,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:41,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2023-11-17 12:07:41,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:41,771 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 12:07:41,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:41,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1721230800, now seen corresponding path program 40 times [2023-11-17 12:07:41,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:41,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655587695] [2023-11-17 12:07:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:41,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:41,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:41,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655587695] [2023-11-17 12:07:41,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655587695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:41,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016181696] [2023-11-17 12:07:41,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:07:41,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:41,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:41,996 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 12:07:41,996 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 12:07:42,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:07:42,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:42,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:07:42,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:42,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:42,381 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 12:07:42,381 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 42 treesize of output 60 [2023-11-17 12:07:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:42,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016181696] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:42,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:42,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2023-11-17 12:07:42,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705940920] [2023-11-17 12:07:42,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:42,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:07:42,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:42,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:07:42,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:07:42,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:07:42,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 1244 transitions, 35093 flow. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:42,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:42,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:07:42,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:46,296 INFO L124 PetriNetUnfolderBase]: 5416/8695 cut-off events. [2023-11-17 12:07:46,296 INFO L125 PetriNetUnfolderBase]: For 431530/431530 co-relation queries the response was YES. [2023-11-17 12:07:46,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115359 conditions, 8695 events. 5416/8695 cut-off events. For 431530/431530 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 55808 event pairs, 1207 based on Foata normal form. 84/8779 useless extension candidates. Maximal degree in co-relation 115206. Up to 7519 conditions per place. [2023-11-17 12:07:46,439 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 1102 selfloop transitions, 195 changer transitions 9/1306 dead transitions. [2023-11-17 12:07:46,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 1306 transitions, 38964 flow [2023-11-17 12:07:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:07:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:07:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2023-11-17 12:07:46,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1508097165991903 [2023-11-17 12:07:46,440 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 149 transitions. [2023-11-17 12:07:46,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 149 transitions. [2023-11-17 12:07:46,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:46,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 149 transitions. [2023-11-17 12:07:46,440 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 12:07:46,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:46,441 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:46,441 INFO L175 Difference]: Start difference. First operand has 489 places, 1244 transitions, 35093 flow. Second operand 19 states and 149 transitions. [2023-11-17 12:07:46,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 1306 transitions, 38964 flow [2023-11-17 12:07:49,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1306 transitions, 37785 flow, removed 251 selfloop flow, removed 14 redundant places. [2023-11-17 12:07:49,185 INFO L231 Difference]: Finished difference. Result has 494 places, 1264 transitions, 35101 flow [2023-11-17 12:07:49,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=33846, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1060, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=35101, PETRI_PLACES=494, PETRI_TRANSITIONS=1264} [2023-11-17 12:07:49,186 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 471 predicate places. [2023-11-17 12:07:49,186 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 1264 transitions, 35101 flow [2023-11-17 12:07:49,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:49,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:49,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:49,192 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 12:07:49,389 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,SelfDestructingSolverStorable116 [2023-11-17 12:07:49,389 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 12:07:49,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:49,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2130014574, now seen corresponding path program 41 times [2023-11-17 12:07:49,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:49,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759135375] [2023-11-17 12:07:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:49,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:49,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:49,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759135375] [2023-11-17 12:07:49,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759135375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:49,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389620702] [2023-11-17 12:07:49,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:07:49,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:49,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:49,602 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 12:07:49,603 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 12:07:49,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:07:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:49,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:07:49,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:49,958 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:07:49,959 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 30 treesize of output 10 [2023-11-17 12:07:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:49,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:50,020 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 12:07:50,020 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 40 treesize of output 56 [2023-11-17 12:07:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:50,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389620702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:50,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:50,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-17 12:07:50,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116691655] [2023-11-17 12:07:50,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:50,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:07:50,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:50,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:07:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:07:50,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:07:50,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 1264 transitions, 35101 flow. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:50,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:50,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:07:50,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:54,106 INFO L124 PetriNetUnfolderBase]: 5415/8772 cut-off events. [2023-11-17 12:07:54,106 INFO L125 PetriNetUnfolderBase]: For 467756/467756 co-relation queries the response was YES. [2023-11-17 12:07:54,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115696 conditions, 8772 events. 5415/8772 cut-off events. For 467756/467756 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 56889 event pairs, 839 based on Foata normal form. 70/8842 useless extension candidates. Maximal degree in co-relation 115539. Up to 5709 conditions per place. [2023-11-17 12:07:54,242 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 943 selfloop transitions, 314 changer transitions 51/1308 dead transitions. [2023-11-17 12:07:54,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1308 transitions, 38076 flow [2023-11-17 12:07:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:07:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:07:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 153 transitions. [2023-11-17 12:07:54,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1548582995951417 [2023-11-17 12:07:54,243 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 153 transitions. [2023-11-17 12:07:54,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 153 transitions. [2023-11-17 12:07:54,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:54,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 153 transitions. [2023-11-17 12:07:54,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.052631578947368) internal successors, (153), 19 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 12:07:54,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:54,244 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:54,245 INFO L175 Difference]: Start difference. First operand has 494 places, 1264 transitions, 35101 flow. Second operand 19 states and 153 transitions. [2023-11-17 12:07:54,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1308 transitions, 38076 flow [2023-11-17 12:07:57,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1308 transitions, 37380 flow, removed 276 selfloop flow, removed 8 redundant places. [2023-11-17 12:07:57,241 INFO L231 Difference]: Finished difference. Result has 504 places, 1215 transitions, 33471 flow [2023-11-17 12:07:57,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=33118, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=33471, PETRI_PLACES=504, PETRI_TRANSITIONS=1215} [2023-11-17 12:07:57,242 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 481 predicate places. [2023-11-17 12:07:57,242 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 1215 transitions, 33471 flow [2023-11-17 12:07:57,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:57,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:57,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:57,249 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 12:07:57,443 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,SelfDestructingSolverStorable117 [2023-11-17 12:07:57,443 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 12:07:57,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash 348258958, now seen corresponding path program 42 times [2023-11-17 12:07:57,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:57,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948409309] [2023-11-17 12:07:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:57,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:57,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:57,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948409309] [2023-11-17 12:07:57,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948409309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:57,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919390594] [2023-11-17 12:07:57,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:07:57,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:57,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:57,657 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 12:07:57,657 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 12:07:57,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:07:57,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:57,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:07:57,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:58,002 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:07:58,002 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 30 treesize of output 10 [2023-11-17 12:07:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:58,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:58,067 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 12:07:58,067 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 42 treesize of output 60 [2023-11-17 12:07:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:07:58,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919390594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:58,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:58,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-17 12:07:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569506090] [2023-11-17 12:07:58,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:58,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:07:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:07:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:07:58,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:07:58,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 1215 transitions, 33471 flow. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:58,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:58,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:07:58,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:01,760 INFO L124 PetriNetUnfolderBase]: 5240/8493 cut-off events. [2023-11-17 12:08:01,760 INFO L125 PetriNetUnfolderBase]: For 442869/442869 co-relation queries the response was YES. [2023-11-17 12:08:01,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111996 conditions, 8493 events. 5240/8493 cut-off events. For 442869/442869 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 54841 event pairs, 1212 based on Foata normal form. 36/8529 useless extension candidates. Maximal degree in co-relation 111838. Up to 7338 conditions per place. [2023-11-17 12:08:01,887 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 1040 selfloop transitions, 162 changer transitions 26/1228 dead transitions. [2023-11-17 12:08:01,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1228 transitions, 35601 flow [2023-11-17 12:08:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:08:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:08:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 134 transitions. [2023-11-17 12:08:01,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1515837104072398 [2023-11-17 12:08:01,888 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 134 transitions. [2023-11-17 12:08:01,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 134 transitions. [2023-11-17 12:08:01,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:01,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 134 transitions. [2023-11-17 12:08:01,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.882352941176471) internal successors, (134), 17 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 12:08:01,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:01,889 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:01,889 INFO L175 Difference]: Start difference. First operand has 504 places, 1215 transitions, 33471 flow. Second operand 17 states and 134 transitions. [2023-11-17 12:08:01,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 1228 transitions, 35601 flow [2023-11-17 12:08:04,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1228 transitions, 34915 flow, removed 138 selfloop flow, removed 12 redundant places. [2023-11-17 12:08:04,521 INFO L231 Difference]: Finished difference. Result has 502 places, 1177 transitions, 31937 flow [2023-11-17 12:08:04,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=32170, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1036, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=31937, PETRI_PLACES=502, PETRI_TRANSITIONS=1177} [2023-11-17 12:08:04,522 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 479 predicate places. [2023-11-17 12:08:04,522 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1177 transitions, 31937 flow [2023-11-17 12:08:04,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:04,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:04,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:04,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2023-11-17 12:08:04,722 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,SelfDestructingSolverStorable118 [2023-11-17 12:08:04,723 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:08:04,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2121608280, now seen corresponding path program 43 times [2023-11-17 12:08:04,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:04,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657845631] [2023-11-17 12:08:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:04,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:08:04,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:04,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657845631] [2023-11-17 12:08:04,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657845631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:04,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360925875] [2023-11-17 12:08:04,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:08:04,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:04,961 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 12:08:04,962 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 12:08:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:05,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:08:05,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:05,302 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:08:05,303 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 30 treesize of output 10 [2023-11-17 12:08:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:08:05,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:05,362 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-17 12:08:05,362 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 42 treesize of output 60 [2023-11-17 12:08:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:08:05,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360925875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:08:05,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:08:05,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-17 12:08:05,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532738292] [2023-11-17 12:08:05,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:08:05,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:08:05,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:08:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:08:05,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:08:05,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1177 transitions, 31937 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:05,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:05,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:08:05,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:09,237 INFO L124 PetriNetUnfolderBase]: 5486/8847 cut-off events. [2023-11-17 12:08:09,237 INFO L125 PetriNetUnfolderBase]: For 462008/462008 co-relation queries the response was YES. [2023-11-17 12:08:09,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116366 conditions, 8847 events. 5486/8847 cut-off events. For 462008/462008 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 57079 event pairs, 1230 based on Foata normal form. 36/8883 useless extension candidates. Maximal degree in co-relation 116211. Up to 7494 conditions per place. [2023-11-17 12:08:09,390 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 1064 selfloop transitions, 213 changer transitions 28/1305 dead transitions. [2023-11-17 12:08:09,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1305 transitions, 38779 flow [2023-11-17 12:08:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:08:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:08:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 125 transitions. [2023-11-17 12:08:09,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1502403846153846 [2023-11-17 12:08:09,391 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 125 transitions. [2023-11-17 12:08:09,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 125 transitions. [2023-11-17 12:08:09,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:09,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 125 transitions. [2023-11-17 12:08:09,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.8125) internal successors, (125), 16 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:09,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:09,392 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 52.0) internal successors, (884), 17 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:09,392 INFO L175 Difference]: Start difference. First operand has 502 places, 1177 transitions, 31937 flow. Second operand 16 states and 125 transitions. [2023-11-17 12:08:09,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1305 transitions, 38779 flow [2023-11-17 12:08:12,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1305 transitions, 38354 flow, removed 46 selfloop flow, removed 14 redundant places. [2023-11-17 12:08:12,621 INFO L231 Difference]: Finished difference. Result has 499 places, 1224 transitions, 33835 flow [2023-11-17 12:08:12,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=31546, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=974, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=33835, PETRI_PLACES=499, PETRI_TRANSITIONS=1224} [2023-11-17 12:08:12,622 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 476 predicate places. [2023-11-17 12:08:12,622 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1224 transitions, 33835 flow [2023-11-17 12:08:12,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:12,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:12,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:12,631 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 12:08:12,829 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,SelfDestructingSolverStorable119 [2023-11-17 12:08:12,829 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:08:12,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2110340392, now seen corresponding path program 44 times [2023-11-17 12:08:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:12,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116113335] [2023-11-17 12:08:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:12,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:08:13,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:13,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116113335] [2023-11-17 12:08:13,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116113335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:13,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552716067] [2023-11-17 12:08:13,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:08:13,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:13,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:13,033 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 12:08:13,035 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 12:08:13,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:08:13,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:08:13,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:08:13,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:13,394 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 12:08:13,394 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 30 treesize of output 10 [2023-11-17 12:08:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:08:13,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:13,462 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 12:08:13,463 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 12:08:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:08:13,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552716067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:08:13,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:08:13,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-11-17 12:08:13,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606983942] [2023-11-17 12:08:13,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:08:13,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:08:13,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:13,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:08:13,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:08:13,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:08:13,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1224 transitions, 33835 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:13,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:13,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:08:13,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:17,302 INFO L124 PetriNetUnfolderBase]: 5356/8613 cut-off events. [2023-11-17 12:08:17,303 INFO L125 PetriNetUnfolderBase]: For 452750/452750 co-relation queries the response was YES. [2023-11-17 12:08:17,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113898 conditions, 8613 events. 5356/8613 cut-off events. For 452750/452750 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 55123 event pairs, 162 based on Foata normal form. 24/8637 useless extension candidates. Maximal degree in co-relation 113739. Up to 5388 conditions per place. [2023-11-17 12:08:17,464 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 1090 selfloop transitions, 174 changer transitions 36/1300 dead transitions. [2023-11-17 12:08:17,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1300 transitions, 38817 flow [2023-11-17 12:08:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:08:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:08:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 94 transitions. [2023-11-17 12:08:17,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.16433566433566432 [2023-11-17 12:08:17,465 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 94 transitions. [2023-11-17 12:08:17,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 94 transitions. [2023-11-17 12:08:17,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:17,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 94 transitions. [2023-11-17 12:08:17,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 12:08:17,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 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 12:08:17,466 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 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 12:08:17,466 INFO L175 Difference]: Start difference. First operand has 499 places, 1224 transitions, 33835 flow. Second operand 11 states and 94 transitions. [2023-11-17 12:08:17,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1300 transitions, 38817 flow [2023-11-17 12:08:20,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1300 transitions, 38224 flow, removed 199 selfloop flow, removed 11 redundant places. [2023-11-17 12:08:20,700 INFO L231 Difference]: Finished difference. Result has 497 places, 1198 transitions, 32822 flow [2023-11-17 12:08:20,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=33087, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=32822, PETRI_PLACES=497, PETRI_TRANSITIONS=1198} [2023-11-17 12:08:20,701 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 474 predicate places. [2023-11-17 12:08:20,701 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1198 transitions, 32822 flow [2023-11-17 12:08:20,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:20,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:20,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:20,708 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 12:08:20,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:20,902 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:08:20,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:20,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1144278576, now seen corresponding path program 45 times [2023-11-17 12:08:20,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:20,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785245794] [2023-11-17 12:08:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:20,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:08:21,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:21,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785245794] [2023-11-17 12:08:21,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785245794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:21,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176694827] [2023-11-17 12:08:21,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:08:21,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:21,158 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 12:08:21,159 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 12:08:21,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:08:21,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:08:21,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-17 12:08:21,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:21,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:08:21,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:08:21,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:08:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:21,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:22,124 WARN L854 $PredicateComparison]: unable to prove that (forall ((~get1~0.base Int) (v_ArrVal_4322 (Array Int Int)) (v_ArrVal_4323 (Array Int Int)) (v_thread1Thread1of1ForFork0_~i~0_413 Int)) (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_4322) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4323))) (let ((.cse0 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse2 (select .cse3 ~get1~0.base))) (or (let ((.cse1 (* v_thread1Thread1of1ForFork0_~i~0_413 4))) (= (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse2 (+ c_~get1~0.offset .cse1)))) (< v_thread1Thread1of1ForFork0_~i~0_413 1) (< c_~n1~0 (+ v_thread1Thread1of1ForFork0_~i~0_413 1)) (not (= (select .cse0 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse2 (+ c_~get1~0.offset 4)))))))) is different from false [2023-11-17 12:08:22,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:08:22,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 72 [2023-11-17 12:08:22,171 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 12:08:22,172 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 1548 treesize of output 1368 [2023-11-17 12:08:22,188 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:08:22,191 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:08:22,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:08:22,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 652 treesize of output 536 [2023-11-17 12:08:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:08:22,222 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:08:22,237 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:08:22,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 492 treesize of output 456 [2023-11-17 12:08:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-17 12:08:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176694827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:08:23,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:08:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 37 [2023-11-17 12:08:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925477085] [2023-11-17 12:08:23,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:08:23,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 12:08:23,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 12:08:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1144, Unknown=7, NotChecked=70, Total=1406 [2023-11-17 12:08:23,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 52 [2023-11-17 12:08:23,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1198 transitions, 32822 flow. Second operand has 38 states, 38 states have (on average 4.605263157894737) internal successors, (175), 38 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 12:08:23,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:23,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 52 [2023-11-17 12:08:23,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-17 12:08:27,592 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 12:08:27,592 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 12:08:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:08:27,660 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:08:27,668 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 12:08:27,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:27,861 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (38states, 3/52 universal loopers) in iteration 122,while PetriNetUnfolder was constructing finite prefix that currently has 96191 conditions, 7022 events (4438/7021 cut-off events. For 368563/368563 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 45451 event pairs, 1049 based on Foata normal form. 21/7301 useless extension candidates. Maximal degree in co-relation 96033. Up to 4742 conditions per place.). [2023-11-17 12:08:27,866 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:08:27,866 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:08:27,866 INFO L445 BasicCegarLoop]: Path program histogram: [45, 35, 11, 9, 6, 6, 3, 2, 1, 1, 1, 1, 1] [2023-11-17 12:08:27,868 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:08:27,869 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:08:27,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:08:27 BasicIcfg [2023-11-17 12:08:27,870 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:08:27,870 INFO L158 Benchmark]: Toolchain (without parser) took 517216.07ms. Allocated memory was 305.1MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 266.3MB in the beginning and 2.8GB in the end (delta: -2.5GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. [2023-11-17 12:08:27,871 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory was 149.9MB in the beginning and 149.8MB in the end (delta: 164.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:08:27,871 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.37ms. Allocated memory is still 305.1MB. Free memory was 265.8MB in the beginning and 253.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-11-17 12:08:27,871 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.30ms. Allocated memory is still 305.1MB. Free memory was 253.7MB in the beginning and 252.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:08:27,871 INFO L158 Benchmark]: Boogie Preprocessor took 30.48ms. Allocated memory is still 305.1MB. Free memory was 252.2MB in the beginning and 250.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:08:27,871 INFO L158 Benchmark]: RCFGBuilder took 635.37ms. Allocated memory is still 305.1MB. Free memory was 250.1MB in the beginning and 195.0MB in the end (delta: 55.1MB). Peak memory consumption was 55.6MB. Max. memory is 8.0GB. [2023-11-17 12:08:27,871 INFO L158 Benchmark]: TraceAbstraction took 516351.37ms. Allocated memory was 305.1MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 194.5MB in the beginning and 2.8GB in the end (delta: -2.6GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. [2023-11-17 12:08:27,871 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory was 149.9MB in the beginning and 149.8MB in the end (delta: 164.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 170.37ms. Allocated memory is still 305.1MB. Free memory was 265.8MB in the beginning and 253.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.30ms. Allocated memory is still 305.1MB. Free memory was 253.7MB in the beginning and 252.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.48ms. Allocated memory is still 305.1MB. Free memory was 252.2MB in the beginning and 250.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 635.37ms. Allocated memory is still 305.1MB. Free memory was 250.1MB in the beginning and 195.0MB in the end (delta: 55.1MB). Peak memory consumption was 55.6MB. Max. memory is 8.0GB. * TraceAbstraction took 516351.37ms. Allocated memory was 305.1MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 194.5MB in the beginning and 2.8GB in the end (delta: -2.6GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.0s, 31 PlacesBefore, 23 PlacesAfterwards, 32 TransitionsBefore, 23 TransitionsAfterwards, 270 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 8 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 17 TotalNumberOfCompositions, 360 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 302, independent: 290, independent conditional: 0, independent unconditional: 290, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 181, independent: 174, independent conditional: 0, independent unconditional: 174, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 181, independent: 174, independent conditional: 0, independent unconditional: 174, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 18, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 302, independent: 116, independent conditional: 0, independent unconditional: 116, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 181, unknown conditional: 0, unknown unconditional: 181] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 28, Positive conditional cache size: 0, Positive unconditional cache size: 28, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (38states, 3/52 universal loopers) in iteration 122,while PetriNetUnfolder was constructing finite prefix that currently has 96191 conditions, 7022 events (4438/7021 cut-off events. For 368563/368563 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 45451 event pairs, 1049 based on Foata normal form. 21/7301 useless extension candidates. Maximal degree in co-relation 96033. Up to 4742 conditions per place.). - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (38states, 3/52 universal loopers) in iteration 122,while PetriNetUnfolder was constructing finite prefix that currently has 96191 conditions, 7022 events (4438/7021 cut-off events. For 368563/368563 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 45451 event pairs, 1049 based on Foata normal form. 21/7301 useless extension candidates. Maximal degree in co-relation 96033. Up to 4742 conditions per place.). - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (38states, 3/52 universal loopers) in iteration 122,while PetriNetUnfolder was constructing finite prefix that currently has 96191 conditions, 7022 events (4438/7021 cut-off events. For 368563/368563 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 45451 event pairs, 1049 based on Foata normal form. 21/7301 useless extension candidates. Maximal degree in co-relation 96033. Up to 4742 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 44 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: 516.3s, OverallIterations: 122, TraceHistogramMax: 3, PathProgramHistogramMax: 45, EmptinessCheckTime: 0.0s, AutomataDifference: 336.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.1s, HoareTripleCheckerStatistics: 85 mSolverCounterUnknown, 12776 SdHoareTripleChecker+Valid, 44.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12776 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 37.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 115 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 981 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 83443 IncrementalHoareTripleChecker+Invalid, 84624 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 981 mSolverCounterUnsat, 0 mSDtfsCounter, 83443 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6894 GetRequests, 2556 SyntacticMatches, 5 SemanticMatches, 4333 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 45374 ImplicationChecksByTransitivity, 85.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35462occurred in iteration=97, InterpolantAutomatonStates: 2153, 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: 1.5s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 132.7s InterpolantComputationTime, 4801 NumberOfCodeBlocks, 4757 NumberOfCodeBlocksAsserted, 327 NumberOfCheckSat, 6577 ConstructedInterpolants, 115 QuantifiedInterpolants, 105863 SizeOfPredicates, 1689 NumberOfNonLiveVariables, 26523 ConjunctsInSsa, 3341 ConjunctsInUnsatCore, 337 InterpolantComputations, 31 PerfectInterpolantSequences, 1024/2215 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