/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:08:22,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:08:22,743 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 16:08:22,775 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:08:22,776 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:08:22,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:08:22,777 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:08:22,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:08:22,778 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:08:22,782 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:08:22,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:08:22,783 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:08:22,783 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:08:22,784 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:08:22,784 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:08:22,785 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:08:22,785 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:08:22,785 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:08:22,785 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:08:22,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:08:22,786 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:08:22,786 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:08:22,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:08:22,787 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:08:22,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:08:22,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:08:22,787 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:08:22,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:08:22,788 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:08:22,788 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:08:22,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:08:22,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:08:22,789 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:08:23,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:08:23,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:08:23,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:08:23,044 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:08:23,045 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:08:23,046 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-17 16:08:24,225 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:08:24,458 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:08:24,459 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-17 16:08:24,468 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/329acefcb/69789a59c98b48c19f4dd37b4e383aa7/FLAGafcee44f0 [2023-11-17 16:08:24,487 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/329acefcb/69789a59c98b48c19f4dd37b4e383aa7 [2023-11-17 16:08:24,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:08:24,492 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:08:24,495 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:08:24,495 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:08:24,499 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:08:24,500 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,501 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca706c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24, skipping insertion in model container [2023-11-17 16:08:24,501 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,529 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:08:24,689 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2023-11-17 16:08:24,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:08:24,708 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:08:24,743 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2023-11-17 16:08:24,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:08:24,761 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:08:24,761 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:08:24,768 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:08:24,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24 WrapperNode [2023-11-17 16:08:24,769 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:08:24,770 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:08:24,770 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:08:24,770 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:08:24,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,818 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2023-11-17 16:08:24,819 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:08:24,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:08:24,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:08:24,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:08:24,832 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,842 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,845 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,846 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,850 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:08:24,851 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:08:24,851 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:08:24,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:08:24,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (1/1) ... [2023-11-17 16:08:24,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:08:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:24,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 16:08:24,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 16:08:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:08:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:08:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:08:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:08:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:08:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:08:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:08:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:08:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:08:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:08:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:08:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:08:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:08:24,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:08:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:08:24,924 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:08:25,065 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:08:25,067 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:08:25,371 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:08:25,496 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:08:25,496 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:08:25,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:08:25 BoogieIcfgContainer [2023-11-17 16:08:25,498 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:08:25,502 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:08:25,503 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:08:25,506 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:08:25,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:08:24" (1/3) ... [2023-11-17 16:08:25,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8de69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:08:25, skipping insertion in model container [2023-11-17 16:08:25,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:24" (2/3) ... [2023-11-17 16:08:25,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8de69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:08:25, skipping insertion in model container [2023-11-17 16:08:25,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:08:25" (3/3) ... [2023-11-17 16:08:25,508 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-11-17 16:08:25,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:08:25,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:08:25,525 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:08:25,582 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:08:25,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 254 flow [2023-11-17 16:08:25,658 INFO L124 PetriNetUnfolderBase]: 9/118 cut-off events. [2023-11-17 16:08:25,659 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:08:25,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-11-17 16:08:25,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 254 flow [2023-11-17 16:08:25,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2023-11-17 16:08:25,671 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:08:25,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 109 transitions, 230 flow [2023-11-17 16:08:25,684 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 109 transitions, 230 flow [2023-11-17 16:08:25,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 230 flow [2023-11-17 16:08:25,707 INFO L124 PetriNetUnfolderBase]: 9/109 cut-off events. [2023-11-17 16:08:25,708 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:08:25,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 109 events. 9/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-11-17 16:08:25,710 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-17 16:08:28,894 INFO L134 LiptonReduction]: Checked pairs total: 693 [2023-11-17 16:08:28,894 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-11-17 16:08:28,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:08:28,920 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;@4884c22b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:08:28,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:08:28,925 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:08:28,926 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-17 16:08:28,926 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:08:28,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:28,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:28,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:28,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:28,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1748347615, now seen corresponding path program 1 times [2023-11-17 16:08:28,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:28,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540725364] [2023-11-17 16:08:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:28,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:29,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:29,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540725364] [2023-11-17 16:08:29,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540725364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:29,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:29,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:08:29,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688453844] [2023-11-17 16:08:29,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:29,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:08:29,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:29,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:08:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:08:29,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2023-11-17 16:08:29,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:29,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2023-11-17 16:08:29,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:29,337 INFO L124 PetriNetUnfolderBase]: 75/136 cut-off events. [2023-11-17 16:08:29,337 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-17 16:08:29,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 136 events. 75/136 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 355 event pairs, 24 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-17 16:08:29,340 INFO L140 encePairwiseOnDemand]: 227/231 looper letters, 25 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-11-17 16:08:29,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 29 transitions, 137 flow [2023-11-17 16:08:29,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:08:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:08:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-11-17 16:08:29,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2023-11-17 16:08:29,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-11-17 16:08:29,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-11-17 16:08:29,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:29,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-11-17 16:08:29,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,367 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 345 transitions. [2023-11-17 16:08:29,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 29 transitions, 137 flow [2023-11-17 16:08:29,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:08:29,371 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-17 16:08:29,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-17 16:08:29,376 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-17 16:08:29,376 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-17 16:08:29,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:29,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:29,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:08:29,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:29,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:29,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1639329445, now seen corresponding path program 1 times [2023-11-17 16:08:29,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:29,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111219970] [2023-11-17 16:08:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:29,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:29,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:29,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111219970] [2023-11-17 16:08:29,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111219970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:29,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:29,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:08:29,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583273277] [2023-11-17 16:08:29,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:29,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:29,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:08:29,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:08:29,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:29,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:08:29,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:29,713 INFO L124 PetriNetUnfolderBase]: 129/247 cut-off events. [2023-11-17 16:08:29,713 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-17 16:08:29,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 247 events. 129/247 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 845 event pairs, 77 based on Foata normal form. 14/259 useless extension candidates. Maximal degree in co-relation 236. Up to 137 conditions per place. [2023-11-17 16:08:29,720 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 37 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-11-17 16:08:29,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 42 transitions, 204 flow [2023-11-17 16:08:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:08:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:08:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 454 transitions. [2023-11-17 16:08:29,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930735930735931 [2023-11-17 16:08:29,723 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 454 transitions. [2023-11-17 16:08:29,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 454 transitions. [2023-11-17 16:08:29,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:29,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 454 transitions. [2023-11-17 16:08:29,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,729 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,729 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 454 transitions. [2023-11-17 16:08:29,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 42 transitions, 204 flow [2023-11-17 16:08:29,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:29,731 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 92 flow [2023-11-17 16:08:29,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-11-17 16:08:29,732 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 16:08:29,732 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 92 flow [2023-11-17 16:08:29,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:29,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:29,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:08:29,733 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:29,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:29,733 INFO L85 PathProgramCache]: Analyzing trace with hash 636988342, now seen corresponding path program 1 times [2023-11-17 16:08:29,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:29,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525410466] [2023-11-17 16:08:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:29,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:29,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:29,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525410466] [2023-11-17 16:08:29,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525410466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:29,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:29,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:08:29,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328700559] [2023-11-17 16:08:29,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:29,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:29,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:29,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:29,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:08:29,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:08:29,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:29,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:08:29,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:29,908 INFO L124 PetriNetUnfolderBase]: 99/193 cut-off events. [2023-11-17 16:08:29,908 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-17 16:08:29,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 193 events. 99/193 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 607 event pairs, 63 based on Foata normal form. 8/200 useless extension candidates. Maximal degree in co-relation 357. Up to 137 conditions per place. [2023-11-17 16:08:29,909 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 18 selfloop transitions, 2 changer transitions 17/37 dead transitions. [2023-11-17 16:08:29,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 37 transitions, 207 flow [2023-11-17 16:08:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:08:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:08:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 451 transitions. [2023-11-17 16:08:29,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2023-11-17 16:08:29,913 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 451 transitions. [2023-11-17 16:08:29,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 451 transitions. [2023-11-17 16:08:29,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:29,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 451 transitions. [2023-11-17 16:08:29,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.2) internal successors, (451), 5 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,917 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,918 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 92 flow. Second operand 5 states and 451 transitions. [2023-11-17 16:08:29,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 37 transitions, 207 flow [2023-11-17 16:08:29,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 37 transitions, 203 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:29,921 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 80 flow [2023-11-17 16:08:29,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-11-17 16:08:29,922 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-17 16:08:29,922 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 80 flow [2023-11-17 16:08:29,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:29,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:29,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:29,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:08:29,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:29,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1827898946, now seen corresponding path program 1 times [2023-11-17 16:08:29,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:29,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656905745] [2023-11-17 16:08:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:29,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:30,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:30,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656905745] [2023-11-17 16:08:30,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656905745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:30,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797888775] [2023-11-17 16:08:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:30,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:30,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:30,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:30,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 16:08:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:30,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:08:30,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:30,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:30,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797888775] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:30,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:08:30,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-17 16:08:30,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197009300] [2023-11-17 16:08:30,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:30,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:30,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:30,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:08:30,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:08:30,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:30,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:08:30,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:30,323 INFO L124 PetriNetUnfolderBase]: 72/131 cut-off events. [2023-11-17 16:08:30,323 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-17 16:08:30,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 131 events. 72/131 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 314 event pairs, 30 based on Foata normal form. 14/144 useless extension candidates. Maximal degree in co-relation 381. Up to 97 conditions per place. [2023-11-17 16:08:30,324 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 23 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-11-17 16:08:30,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 167 flow [2023-11-17 16:08:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:08:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:08:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 441 transitions. [2023-11-17 16:08:30,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2023-11-17 16:08:30,326 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 441 transitions. [2023-11-17 16:08:30,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 441 transitions. [2023-11-17 16:08:30,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:30,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 441 transitions. [2023-11-17 16:08:30,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,331 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,332 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 80 flow. Second operand 5 states and 441 transitions. [2023-11-17 16:08:30,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 167 flow [2023-11-17 16:08:30,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 139 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-17 16:08:30,334 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2023-11-17 16:08:30,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-11-17 16:08:30,334 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 16:08:30,335 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2023-11-17 16:08:30,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:30,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:30,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:30,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:30,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:30,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:30,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2145274687, now seen corresponding path program 1 times [2023-11-17 16:08:30,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:30,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192046695] [2023-11-17 16:08:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:30,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:30,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:30,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192046695] [2023-11-17 16:08:30,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192046695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:30,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433550586] [2023-11-17 16:08:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:30,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:30,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:30,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:30,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:08:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:30,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:08:30,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:30,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:30,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433550586] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:30,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:08:30,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-17 16:08:30,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385621910] [2023-11-17 16:08:30,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:30,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:30,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:08:30,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:08:30,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:30,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:08:30,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:30,851 INFO L124 PetriNetUnfolderBase]: 66/119 cut-off events. [2023-11-17 16:08:30,852 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-17 16:08:30,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 119 events. 66/119 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 268 event pairs, 29 based on Foata normal form. 10/128 useless extension candidates. Maximal degree in co-relation 325. Up to 94 conditions per place. [2023-11-17 16:08:30,853 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 24 selfloop transitions, 5 changer transitions 0/29 dead transitions. [2023-11-17 16:08:30,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 172 flow [2023-11-17 16:08:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:08:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:08:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 441 transitions. [2023-11-17 16:08:30,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2023-11-17 16:08:30,855 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 441 transitions. [2023-11-17 16:08:30,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 441 transitions. [2023-11-17 16:08:30,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:30,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 441 transitions. [2023-11-17 16:08:30,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,861 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,861 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 441 transitions. [2023-11-17 16:08:30,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 29 transitions, 172 flow [2023-11-17 16:08:30,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 157 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 16:08:30,864 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2023-11-17 16:08:30,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-11-17 16:08:30,866 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-11-17 16:08:30,867 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2023-11-17 16:08:30,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:30,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:30,867 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 16:08:30,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 16:08:31,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:31,074 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:31,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:31,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1060631336, now seen corresponding path program 1 times [2023-11-17 16:08:31,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:31,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899645637] [2023-11-17 16:08:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:31,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:31,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:31,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899645637] [2023-11-17 16:08:31,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899645637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:31,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292645610] [2023-11-17 16:08:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:31,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:31,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:31,447 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:31,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:08:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:31,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 16:08:31,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:31,613 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 16:08:31,650 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 16:08:31,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:31,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:08:31,750 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 16:08:31,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:31,791 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_105 (Array Int Int))) (= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_105) c_~A~0.base) c_~A~0.offset))) is different from false [2023-11-17 16:08:31,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:31,925 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 46 treesize of output 35 [2023-11-17 16:08:31,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 286 treesize of output 254 [2023-11-17 16:08:31,944 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 13 treesize of output 11 [2023-11-17 16:08:31,958 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 24 treesize of output 20 [2023-11-17 16:08:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:31,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292645610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:31,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:31,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-11-17 16:08:31,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978274964] [2023-11-17 16:08:31,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:31,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:08:31,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:31,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:08:31,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=298, Unknown=9, NotChecked=36, Total=420 [2023-11-17 16:08:31,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 231 [2023-11-17 16:08:31,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 21 states, 21 states have (on average 67.71428571428571) internal successors, (1422), 21 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:31,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:31,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 231 [2023-11-17 16:08:31,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:32,350 INFO L124 PetriNetUnfolderBase]: 110/198 cut-off events. [2023-11-17 16:08:32,351 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-11-17 16:08:32,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 604 event pairs, 5 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2023-11-17 16:08:32,352 INFO L140 encePairwiseOnDemand]: 223/231 looper letters, 39 selfloop transitions, 14 changer transitions 1/54 dead transitions. [2023-11-17 16:08:32,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 309 flow [2023-11-17 16:08:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:08:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:08:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 580 transitions. [2023-11-17 16:08:32,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31385281385281383 [2023-11-17 16:08:32,355 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 580 transitions. [2023-11-17 16:08:32,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 580 transitions. [2023-11-17 16:08:32,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:32,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 580 transitions. [2023-11-17 16:08:32,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.5) internal successors, (580), 8 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,361 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,361 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 580 transitions. [2023-11-17 16:08:32,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 309 flow [2023-11-17 16:08:32,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 54 transitions, 297 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-17 16:08:32,363 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 174 flow [2023-11-17 16:08:32,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-11-17 16:08:32,364 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-17 16:08:32,364 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 174 flow [2023-11-17 16:08:32,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 67.71428571428571) internal successors, (1422), 21 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:32,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:32,365 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 16:08:32,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:32,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:32,571 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:32,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:32,572 INFO L85 PathProgramCache]: Analyzing trace with hash -102949908, now seen corresponding path program 2 times [2023-11-17 16:08:32,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:32,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126971955] [2023-11-17 16:08:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:32,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:33,014 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 16:08:33,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:33,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126971955] [2023-11-17 16:08:33,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126971955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:33,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242574277] [2023-11-17 16:08:33,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:08:33,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:33,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:33,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:33,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 16:08:33,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:33,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:33,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:08:33,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:33,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:33,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:33,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2023-11-17 16:08:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:33,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242574277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:33,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:33,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 12 [2023-11-17 16:08:33,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088358971] [2023-11-17 16:08:33,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:33,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:08:33,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:33,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:08:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:08:33,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 231 [2023-11-17 16:08:33,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 174 flow. Second operand has 14 states, 14 states have (on average 68.57142857142857) internal successors, (960), 14 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:33,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 231 [2023-11-17 16:08:33,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:33,462 INFO L124 PetriNetUnfolderBase]: 137/246 cut-off events. [2023-11-17 16:08:33,462 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2023-11-17 16:08:33,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 786 event pairs, 25 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2023-11-17 16:08:33,464 INFO L140 encePairwiseOnDemand]: 223/231 looper letters, 39 selfloop transitions, 15 changer transitions 1/55 dead transitions. [2023-11-17 16:08:33,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 389 flow [2023-11-17 16:08:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:08:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:08:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 640 transitions. [2023-11-17 16:08:33,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30784030784030786 [2023-11-17 16:08:33,467 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 640 transitions. [2023-11-17 16:08:33,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 640 transitions. [2023-11-17 16:08:33,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:33,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 640 transitions. [2023-11-17 16:08:33,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 71.11111111111111) internal successors, (640), 9 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,474 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,475 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 174 flow. Second operand 9 states and 640 transitions. [2023-11-17 16:08:33,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 389 flow [2023-11-17 16:08:33,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 375 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:33,478 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 283 flow [2023-11-17 16:08:33,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-17 16:08:33,478 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-17 16:08:33,478 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 283 flow [2023-11-17 16:08:33,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.57142857142857) internal successors, (960), 14 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:33,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:33,479 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 16:08:33,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:33,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:33,686 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:33,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:33,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2140696766, now seen corresponding path program 3 times [2023-11-17 16:08:33,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:33,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031422277] [2023-11-17 16:08:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:33,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:33,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:33,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031422277] [2023-11-17 16:08:33,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031422277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:33,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969405479] [2023-11-17 16:08:33,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:08:33,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:33,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:33,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:33,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:08:33,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:08:33,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:33,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:08:33,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:34,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:34,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:34,051 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 21 treesize of output 14 [2023-11-17 16:08:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:34,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969405479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:34,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:34,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-11-17 16:08:34,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219223999] [2023-11-17 16:08:34,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:34,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:08:34,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:08:34,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:08:34,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 231 [2023-11-17 16:08:34,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 283 flow. Second operand has 11 states, 11 states have (on average 82.63636363636364) internal successors, (909), 11 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:34,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:34,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 231 [2023-11-17 16:08:34,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:34,236 INFO L124 PetriNetUnfolderBase]: 159/285 cut-off events. [2023-11-17 16:08:34,236 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2023-11-17 16:08:34,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 285 events. 159/285 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 958 event pairs, 37 based on Foata normal form. 1/286 useless extension candidates. Maximal degree in co-relation 1097. Up to 233 conditions per place. [2023-11-17 16:08:34,238 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 43 selfloop transitions, 15 changer transitions 1/59 dead transitions. [2023-11-17 16:08:34,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 483 flow [2023-11-17 16:08:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:08:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:08:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 603 transitions. [2023-11-17 16:08:34,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37291280148423006 [2023-11-17 16:08:34,241 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 603 transitions. [2023-11-17 16:08:34,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 603 transitions. [2023-11-17 16:08:34,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:34,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 603 transitions. [2023-11-17 16:08:34,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 86.14285714285714) internal successors, (603), 7 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:34,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:34,246 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:34,246 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 283 flow. Second operand 7 states and 603 transitions. [2023-11-17 16:08:34,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 483 flow [2023-11-17 16:08:34,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 451 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-17 16:08:34,251 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 351 flow [2023-11-17 16:08:34,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=351, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-17 16:08:34,253 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-11-17 16:08:34,253 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 351 flow [2023-11-17 16:08:34,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 82.63636363636364) internal successors, (909), 11 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:34,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:34,254 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 16:08:34,263 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 16:08:34,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:34,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:34,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:34,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2130477550, now seen corresponding path program 4 times [2023-11-17 16:08:34,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:34,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353961619] [2023-11-17 16:08:34,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:34,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:34,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:34,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353961619] [2023-11-17 16:08:34,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353961619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:34,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995687299] [2023-11-17 16:08:34,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:08:34,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:34,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:34,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:34,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:08:34,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:08:34,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:34,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:08:34,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:34,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:34,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:34,822 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 21 treesize of output 14 [2023-11-17 16:08:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:34,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995687299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:34,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:34,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-11-17 16:08:34,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047033281] [2023-11-17 16:08:34,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:34,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:08:34,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:34,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:08:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:08:34,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 231 [2023-11-17 16:08:34,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 351 flow. Second operand has 11 states, 11 states have (on average 82.63636363636364) internal successors, (909), 11 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:34,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:34,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 231 [2023-11-17 16:08:34,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:34,999 INFO L124 PetriNetUnfolderBase]: 175/314 cut-off events. [2023-11-17 16:08:34,999 INFO L125 PetriNetUnfolderBase]: For 733/733 co-relation queries the response was YES. [2023-11-17 16:08:35,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1299 conditions, 314 events. 175/314 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1113 event pairs, 43 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 1266. Up to 258 conditions per place. [2023-11-17 16:08:35,002 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 48 selfloop transitions, 15 changer transitions 1/64 dead transitions. [2023-11-17 16:08:35,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 555 flow [2023-11-17 16:08:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:08:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:08:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 605 transitions. [2023-11-17 16:08:35,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2023-11-17 16:08:35,005 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 605 transitions. [2023-11-17 16:08:35,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 605 transitions. [2023-11-17 16:08:35,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:35,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 605 transitions. [2023-11-17 16:08:35,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 86.42857142857143) internal successors, (605), 7 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:35,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:35,009 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:35,009 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 351 flow. Second operand 7 states and 605 transitions. [2023-11-17 16:08:35,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 555 flow [2023-11-17 16:08:35,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 534 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:35,013 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 411 flow [2023-11-17 16:08:35,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=411, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-17 16:08:35,014 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-11-17 16:08:35,014 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 411 flow [2023-11-17 16:08:35,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 82.63636363636364) internal successors, (909), 11 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:35,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:35,015 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 16:08:35,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:35,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:35,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1670216908, now seen corresponding path program 5 times [2023-11-17 16:08:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:35,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344767931] [2023-11-17 16:08:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:35,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:35,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344767931] [2023-11-17 16:08:35,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344767931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:35,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118630222] [2023-11-17 16:08:35,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:08:35,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:35,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:35,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:35,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:08:35,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:35,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:35,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:08:35,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:35,525 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 14 treesize of output 12 [2023-11-17 16:08:35,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:08:35,578 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 16:08:35,602 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 16:08:35,642 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 16:08:35,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:35,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118630222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:35,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:35,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 4] total 12 [2023-11-17 16:08:35,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160712443] [2023-11-17 16:08:35,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:35,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:08:35,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:35,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:08:35,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:08:35,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 231 [2023-11-17 16:08:35,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 411 flow. Second operand has 14 states, 14 states have (on average 68.42857142857143) internal successors, (958), 14 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:35,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:35,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 231 [2023-11-17 16:08:35,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:35,937 INFO L124 PetriNetUnfolderBase]: 209/373 cut-off events. [2023-11-17 16:08:35,938 INFO L125 PetriNetUnfolderBase]: For 1139/1139 co-relation queries the response was YES. [2023-11-17 16:08:35,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 373 events. 209/373 cut-off events. For 1139/1139 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1386 event pairs, 35 based on Foata normal form. 1/374 useless extension candidates. Maximal degree in co-relation 1585. Up to 301 conditions per place. [2023-11-17 16:08:35,941 INFO L140 encePairwiseOnDemand]: 223/231 looper letters, 48 selfloop transitions, 20 changer transitions 1/69 dead transitions. [2023-11-17 16:08:35,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 662 flow [2023-11-17 16:08:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:08:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:08:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 640 transitions. [2023-11-17 16:08:35,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30784030784030786 [2023-11-17 16:08:35,944 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 640 transitions. [2023-11-17 16:08:35,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 640 transitions. [2023-11-17 16:08:35,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:35,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 640 transitions. [2023-11-17 16:08:35,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 71.11111111111111) internal successors, (640), 9 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:35,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:35,950 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:35,950 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 411 flow. Second operand 9 states and 640 transitions. [2023-11-17 16:08:35,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 662 flow [2023-11-17 16:08:35,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 634 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-17 16:08:35,956 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 518 flow [2023-11-17 16:08:35,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=518, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-11-17 16:08:35,957 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-11-17 16:08:35,957 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 518 flow [2023-11-17 16:08:35,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.42857142857143) internal successors, (958), 14 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:35,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:35,958 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 16:08:35,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 16:08:36,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:36,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:36,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:36,166 INFO L85 PathProgramCache]: Analyzing trace with hash 734154216, now seen corresponding path program 6 times [2023-11-17 16:08:36,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:36,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002044027] [2023-11-17 16:08:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:36,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:36,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:36,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002044027] [2023-11-17 16:08:36,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002044027] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:36,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594860508] [2023-11-17 16:08:36,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:08:36,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:36,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:36,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:36,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:08:36,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:08:36,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:36,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:08:36,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:36,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:36,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:36,560 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 21 treesize of output 14 [2023-11-17 16:08:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:36,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594860508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:36,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:36,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-11-17 16:08:36,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372505943] [2023-11-17 16:08:36,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:36,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:08:36,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:36,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:08:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:08:36,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 231 [2023-11-17 16:08:36,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 518 flow. Second operand has 11 states, 11 states have (on average 82.63636363636364) internal successors, (909), 11 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:36,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:36,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 231 [2023-11-17 16:08:36,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:36,760 INFO L124 PetriNetUnfolderBase]: 225/402 cut-off events. [2023-11-17 16:08:36,760 INFO L125 PetriNetUnfolderBase]: For 1496/1496 co-relation queries the response was YES. [2023-11-17 16:08:36,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1823 conditions, 402 events. 225/402 cut-off events. For 1496/1496 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1528 event pairs, 61 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 1782. Up to 350 conditions per place. [2023-11-17 16:08:36,764 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 54 selfloop transitions, 15 changer transitions 1/70 dead transitions. [2023-11-17 16:08:36,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 70 transitions, 740 flow [2023-11-17 16:08:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:08:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:08:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 601 transitions. [2023-11-17 16:08:36,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3716759431045145 [2023-11-17 16:08:36,767 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 601 transitions. [2023-11-17 16:08:36,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 601 transitions. [2023-11-17 16:08:36,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:36,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 601 transitions. [2023-11-17 16:08:36,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:36,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:36,771 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:36,771 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 518 flow. Second operand 7 states and 601 transitions. [2023-11-17 16:08:36,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 70 transitions, 740 flow [2023-11-17 16:08:36,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 669 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-11-17 16:08:36,777 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 544 flow [2023-11-17 16:08:36,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=544, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-11-17 16:08:36,778 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2023-11-17 16:08:36,778 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 544 flow [2023-11-17 16:08:36,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 82.63636363636364) internal successors, (909), 11 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:36,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:36,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:36,786 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 16:08:36,984 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,SelfDestructingSolverStorable10 [2023-11-17 16:08:36,984 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:36,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1273037055, now seen corresponding path program 7 times [2023-11-17 16:08:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:36,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944244200] [2023-11-17 16:08:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:36,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:37,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:37,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944244200] [2023-11-17 16:08:37,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944244200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:37,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581007656] [2023-11-17 16:08:37,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:08:37,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:37,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:37,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:37,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:08:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:37,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:08:37,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:37,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:37,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581007656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:37,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:37,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:08:37,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128206360] [2023-11-17 16:08:37,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:37,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:08:37,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:37,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:08:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:08:37,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:08:37,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 544 flow. Second operand has 14 states, 14 states have (on average 85.5) internal successors, (1197), 14 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:37,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:37,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:08:37,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:37,461 INFO L124 PetriNetUnfolderBase]: 391/728 cut-off events. [2023-11-17 16:08:37,461 INFO L125 PetriNetUnfolderBase]: For 2817/2817 co-relation queries the response was YES. [2023-11-17 16:08:37,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 728 events. 391/728 cut-off events. For 2817/2817 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3475 event pairs, 167 based on Foata normal form. 38/766 useless extension candidates. Maximal degree in co-relation 2781. Up to 402 conditions per place. [2023-11-17 16:08:37,468 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 105 selfloop transitions, 16 changer transitions 0/121 dead transitions. [2023-11-17 16:08:37,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 121 transitions, 1338 flow [2023-11-17 16:08:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:08:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:08:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 628 transitions. [2023-11-17 16:08:37,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883735312306741 [2023-11-17 16:08:37,470 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 628 transitions. [2023-11-17 16:08:37,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 628 transitions. [2023-11-17 16:08:37,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:37,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 628 transitions. [2023-11-17 16:08:37,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.71428571428571) internal successors, (628), 7 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:37,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:37,474 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:37,475 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 544 flow. Second operand 7 states and 628 transitions. [2023-11-17 16:08:37,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 121 transitions, 1338 flow [2023-11-17 16:08:37,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 121 transitions, 1276 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-17 16:08:37,483 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 753 flow [2023-11-17 16:08:37,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=753, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2023-11-17 16:08:37,484 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2023-11-17 16:08:37,484 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 753 flow [2023-11-17 16:08:37,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 85.5) internal successors, (1197), 14 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:37,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:37,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:37,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:37,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:37,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:37,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:37,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1489369088, now seen corresponding path program 8 times [2023-11-17 16:08:37,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:37,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869527129] [2023-11-17 16:08:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:37,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:37,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869527129] [2023-11-17 16:08:37,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869527129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:37,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884290528] [2023-11-17 16:08:37,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:08:37,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:37,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:37,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:37,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:08:37,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:37,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:37,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:08:37,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:37,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:38,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884290528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:38,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:38,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:08:38,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119045224] [2023-11-17 16:08:38,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:38,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:08:38,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:38,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:08:38,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:08:38,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:08:38,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 753 flow. Second operand has 14 states, 14 states have (on average 85.07142857142857) internal successors, (1191), 14 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:38,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:08:38,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:38,224 INFO L124 PetriNetUnfolderBase]: 323/638 cut-off events. [2023-11-17 16:08:38,224 INFO L125 PetriNetUnfolderBase]: For 2753/2753 co-relation queries the response was YES. [2023-11-17 16:08:38,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2844 conditions, 638 events. 323/638 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3158 event pairs, 155 based on Foata normal form. 44/682 useless extension candidates. Maximal degree in co-relation 2500. Up to 402 conditions per place. [2023-11-17 16:08:38,229 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 56 selfloop transitions, 3 changer transitions 40/99 dead transitions. [2023-11-17 16:08:38,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 1118 flow [2023-11-17 16:08:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:08:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:08:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 627 transitions. [2023-11-17 16:08:38,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2023-11-17 16:08:38,231 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 627 transitions. [2023-11-17 16:08:38,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 627 transitions. [2023-11-17 16:08:38,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:38,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 627 transitions. [2023-11-17 16:08:38,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.57142857142857) internal successors, (627), 7 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,236 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 231.0) internal successors, (1848), 8 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,236 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 753 flow. Second operand 7 states and 627 transitions. [2023-11-17 16:08:38,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 1118 flow [2023-11-17 16:08:38,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 1100 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:38,246 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 609 flow [2023-11-17 16:08:38,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=609, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2023-11-17 16:08:38,247 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2023-11-17 16:08:38,248 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 609 flow [2023-11-17 16:08:38,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 85.07142857142857) internal successors, (1191), 14 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:38,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:38,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:38,459 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,SelfDestructingSolverStorable12 [2023-11-17 16:08:38,460 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:38,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash -504620549, now seen corresponding path program 9 times [2023-11-17 16:08:38,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:38,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891054050] [2023-11-17 16:08:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:38,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:38,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:38,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891054050] [2023-11-17 16:08:38,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891054050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:38,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122926014] [2023-11-17 16:08:38,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:08:38,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:38,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:38,544 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:38,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:08:38,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:08:38,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:38,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:08:38,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:38,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:38,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122926014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:38,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:38,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:08:38,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743161973] [2023-11-17 16:08:38,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:38,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:08:38,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:38,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:08:38,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:08:38,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:08:38,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 59 transitions, 609 flow. Second operand has 14 states, 14 states have (on average 85.07142857142857) internal successors, (1191), 14 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:38,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:08:38,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:38,878 INFO L124 PetriNetUnfolderBase]: 173/307 cut-off events. [2023-11-17 16:08:38,878 INFO L125 PetriNetUnfolderBase]: For 1980/1980 co-relation queries the response was YES. [2023-11-17 16:08:38,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 307 events. 173/307 cut-off events. For 1980/1980 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1062 event pairs, 31 based on Foata normal form. 50/357 useless extension candidates. Maximal degree in co-relation 1650. Up to 148 conditions per place. [2023-11-17 16:08:38,882 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 44 selfloop transitions, 26 changer transitions 0/70 dead transitions. [2023-11-17 16:08:38,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 70 transitions, 833 flow [2023-11-17 16:08:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:08:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:08:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 698 transitions. [2023-11-17 16:08:38,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3777056277056277 [2023-11-17 16:08:38,884 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 698 transitions. [2023-11-17 16:08:38,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 698 transitions. [2023-11-17 16:08:38,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:38,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 698 transitions. [2023-11-17 16:08:38,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 87.25) internal successors, (698), 8 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,889 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,889 INFO L175 Difference]: Start difference. First operand has 78 places, 59 transitions, 609 flow. Second operand 8 states and 698 transitions. [2023-11-17 16:08:38,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 70 transitions, 833 flow [2023-11-17 16:08:38,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 697 flow, removed 65 selfloop flow, removed 9 redundant places. [2023-11-17 16:08:38,896 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 573 flow [2023-11-17 16:08:38,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=573, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-11-17 16:08:38,897 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2023-11-17 16:08:38,897 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 573 flow [2023-11-17 16:08:38,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 85.07142857142857) internal successors, (1191), 14 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:38,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:38,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:38,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:39,103 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,SelfDestructingSolverStorable13 [2023-11-17 16:08:39,103 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:39,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:39,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2001397760, now seen corresponding path program 10 times [2023-11-17 16:08:39,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:39,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17677197] [2023-11-17 16:08:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:39,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:39,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:39,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17677197] [2023-11-17 16:08:39,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17677197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:39,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089704686] [2023-11-17 16:08:39,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:08:39,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:39,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:39,179 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:39,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:08:39,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:08:39,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:39,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:08:39,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:39,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:39,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089704686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:39,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:39,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:08:39,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004403484] [2023-11-17 16:08:39,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:39,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:08:39,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:39,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:08:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:08:39,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:08:39,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 573 flow. Second operand has 14 states, 14 states have (on average 85.28571428571429) internal successors, (1194), 14 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:39,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:39,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:08:39,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:39,521 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2023-11-17 16:08:39,521 INFO L125 PetriNetUnfolderBase]: For 1350/1350 co-relation queries the response was YES. [2023-11-17 16:08:39,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1288 conditions, 223 events. 127/223 cut-off events. For 1350/1350 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 34 based on Foata normal form. 26/249 useless extension candidates. Maximal degree in co-relation 1236. Up to 125 conditions per place. [2023-11-17 16:08:39,523 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 45 selfloop transitions, 26 changer transitions 0/71 dead transitions. [2023-11-17 16:08:39,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 799 flow [2023-11-17 16:08:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:08:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:08:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 698 transitions. [2023-11-17 16:08:39,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3777056277056277 [2023-11-17 16:08:39,526 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 698 transitions. [2023-11-17 16:08:39,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 698 transitions. [2023-11-17 16:08:39,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:39,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 698 transitions. [2023-11-17 16:08:39,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 87.25) internal successors, (698), 8 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:39,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:39,530 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 231.0) internal successors, (2079), 9 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:39,530 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 573 flow. Second operand 8 states and 698 transitions. [2023-11-17 16:08:39,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 799 flow [2023-11-17 16:08:39,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 717 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-11-17 16:08:39,536 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 583 flow [2023-11-17 16:08:39,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=583, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2023-11-17 16:08:39,536 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2023-11-17 16:08:39,537 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 583 flow [2023-11-17 16:08:39,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 85.28571428571429) internal successors, (1194), 14 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:39,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:39,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:39,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:39,742 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,SelfDestructingSolverStorable14 [2023-11-17 16:08:39,742 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:39,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash -180149507, now seen corresponding path program 11 times [2023-11-17 16:08:39,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:39,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20267505] [2023-11-17 16:08:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:39,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:40,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:40,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20267505] [2023-11-17 16:08:40,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20267505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:40,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758565390] [2023-11-17 16:08:40,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:08:40,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:40,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:40,205 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:40,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:08:40,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:40,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:40,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 16:08:40,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:40,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:40,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2023-11-17 16:08:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:40,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:40,548 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_363 (Array Int Int))) (= c_~counter~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_363) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset))))) is different from false [2023-11-17 16:08:40,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:40,616 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 76 treesize of output 66 [2023-11-17 16:08:40,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:40,623 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 18 treesize of output 12 [2023-11-17 16:08:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:40,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758565390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:40,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:40,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-11-17 16:08:40,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579622229] [2023-11-17 16:08:40,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:40,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 16:08:40,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 16:08:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=560, Unknown=5, NotChecked=48, Total=702 [2023-11-17 16:08:40,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 231 [2023-11-17 16:08:40,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 583 flow. Second operand has 27 states, 27 states have (on average 63.7037037037037) internal successors, (1720), 27 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:40,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:40,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 231 [2023-11-17 16:08:40,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:41,375 INFO L124 PetriNetUnfolderBase]: 199/352 cut-off events. [2023-11-17 16:08:41,376 INFO L125 PetriNetUnfolderBase]: For 2177/2177 co-relation queries the response was YES. [2023-11-17 16:08:41,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056 conditions, 352 events. 199/352 cut-off events. For 2177/2177 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1208 event pairs, 6 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 1859. Up to 202 conditions per place. [2023-11-17 16:08:41,379 INFO L140 encePairwiseOnDemand]: 223/231 looper letters, 77 selfloop transitions, 41 changer transitions 1/119 dead transitions. [2023-11-17 16:08:41,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 119 transitions, 1239 flow [2023-11-17 16:08:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:08:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:08:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1078 transitions. [2023-11-17 16:08:41,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2916666666666667 [2023-11-17 16:08:41,383 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1078 transitions. [2023-11-17 16:08:41,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1078 transitions. [2023-11-17 16:08:41,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:41,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1078 transitions. [2023-11-17 16:08:41,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.375) internal successors, (1078), 16 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:41,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 231.0) internal successors, (3927), 17 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:41,391 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 231.0) internal successors, (3927), 17 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:41,391 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 583 flow. Second operand 16 states and 1078 transitions. [2023-11-17 16:08:41,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 119 transitions, 1239 flow [2023-11-17 16:08:41,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 119 transitions, 1172 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-17 16:08:41,401 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 915 flow [2023-11-17 16:08:41,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=915, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2023-11-17 16:08:41,402 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-11-17 16:08:41,402 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 915 flow [2023-11-17 16:08:41,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 63.7037037037037) internal successors, (1720), 27 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:41,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:41,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:41,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-17 16:08:41,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:08:41,615 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:41,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash -369810623, now seen corresponding path program 12 times [2023-11-17 16:08:41,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:41,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467651101] [2023-11-17 16:08:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:41,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:42,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:42,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467651101] [2023-11-17 16:08:42,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467651101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:42,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351303634] [2023-11-17 16:08:42,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:08:42,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:42,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:42,235 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:42,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:08:42,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:08:42,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:42,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 16:08:42,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:42,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:42,804 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:08:42,804 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 37 treesize of output 45 [2023-11-17 16:08:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:43,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351303634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:43,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:43,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2023-11-17 16:08:43,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103182628] [2023-11-17 16:08:43,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:43,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 16:08:43,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:43,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 16:08:43,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2023-11-17 16:08:43,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:08:43,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 915 flow. Second operand has 31 states, 31 states have (on average 60.74193548387097) internal successors, (1883), 31 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:43,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:43,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:08:43,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:44,180 INFO L124 PetriNetUnfolderBase]: 365/630 cut-off events. [2023-11-17 16:08:44,180 INFO L125 PetriNetUnfolderBase]: For 4610/4610 co-relation queries the response was YES. [2023-11-17 16:08:44,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3892 conditions, 630 events. 365/630 cut-off events. For 4610/4610 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2488 event pairs, 28 based on Foata normal form. 3/633 useless extension candidates. Maximal degree in co-relation 3695. Up to 364 conditions per place. [2023-11-17 16:08:44,186 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 108 selfloop transitions, 71 changer transitions 20/199 dead transitions. [2023-11-17 16:08:44,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 199 transitions, 2215 flow [2023-11-17 16:08:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:08:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:08:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1739 transitions. [2023-11-17 16:08:44,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27881994548661215 [2023-11-17 16:08:44,191 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1739 transitions. [2023-11-17 16:08:44,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1739 transitions. [2023-11-17 16:08:44,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:44,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1739 transitions. [2023-11-17 16:08:44,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 64.4074074074074) internal successors, (1739), 27 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:44,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 231.0) internal successors, (6468), 28 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:44,203 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 231.0) internal successors, (6468), 28 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:44,203 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 915 flow. Second operand 27 states and 1739 transitions. [2023-11-17 16:08:44,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 199 transitions, 2215 flow [2023-11-17 16:08:44,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 199 transitions, 2032 flow, removed 65 selfloop flow, removed 6 redundant places. [2023-11-17 16:08:44,222 INFO L231 Difference]: Finished difference. Result has 116 places, 126 transitions, 1619 flow [2023-11-17 16:08:44,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1619, PETRI_PLACES=116, PETRI_TRANSITIONS=126} [2023-11-17 16:08:44,222 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2023-11-17 16:08:44,222 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 126 transitions, 1619 flow [2023-11-17 16:08:44,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 60.74193548387097) internal successors, (1883), 31 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:44,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:44,223 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:44,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:44,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:44,429 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:44,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1007166163, now seen corresponding path program 13 times [2023-11-17 16:08:44,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:44,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153636856] [2023-11-17 16:08:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:44,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:45,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:45,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153636856] [2023-11-17 16:08:45,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153636856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:45,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588560482] [2023-11-17 16:08:45,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:08:45,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:45,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:45,205 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:45,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:08:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:45,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:08:45,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:45,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:45,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:45,603 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 35 treesize of output 43 [2023-11-17 16:08:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:45,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588560482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:45,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:45,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-11-17 16:08:45,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485592097] [2023-11-17 16:08:45,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:45,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:08:45,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:45,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:08:45,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:08:45,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:08:45,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 126 transitions, 1619 flow. Second operand has 26 states, 26 states have (on average 60.80769230769231) internal successors, (1581), 26 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:45,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:45,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:08:45,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:46,526 INFO L124 PetriNetUnfolderBase]: 438/745 cut-off events. [2023-11-17 16:08:46,526 INFO L125 PetriNetUnfolderBase]: For 7546/7546 co-relation queries the response was YES. [2023-11-17 16:08:46,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5217 conditions, 745 events. 438/745 cut-off events. For 7546/7546 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2987 event pairs, 56 based on Foata normal form. 2/747 useless extension candidates. Maximal degree in co-relation 5085. Up to 568 conditions per place. [2023-11-17 16:08:46,534 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 113 selfloop transitions, 75 changer transitions 2/190 dead transitions. [2023-11-17 16:08:46,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 190 transitions, 2686 flow [2023-11-17 16:08:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:08:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:08:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1340 transitions. [2023-11-17 16:08:46,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27623170480313336 [2023-11-17 16:08:46,539 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1340 transitions. [2023-11-17 16:08:46,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1340 transitions. [2023-11-17 16:08:46,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:46,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1340 transitions. [2023-11-17 16:08:46,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.80952380952381) internal successors, (1340), 21 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:46,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:46,548 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:46,548 INFO L175 Difference]: Start difference. First operand has 116 places, 126 transitions, 1619 flow. Second operand 21 states and 1340 transitions. [2023-11-17 16:08:46,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 190 transitions, 2686 flow [2023-11-17 16:08:46,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 190 transitions, 2177 flow, removed 241 selfloop flow, removed 8 redundant places. [2023-11-17 16:08:46,573 INFO L231 Difference]: Finished difference. Result has 133 places, 151 transitions, 1852 flow [2023-11-17 16:08:46,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1852, PETRI_PLACES=133, PETRI_TRANSITIONS=151} [2023-11-17 16:08:46,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 112 predicate places. [2023-11-17 16:08:46,573 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 151 transitions, 1852 flow [2023-11-17 16:08:46,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 60.80769230769231) internal successors, (1581), 26 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:46,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:46,574 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:46,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-17 16:08:46,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 16:08:46,780 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:46,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:46,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1016437767, now seen corresponding path program 14 times [2023-11-17 16:08:46,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:46,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498223284] [2023-11-17 16:08:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:47,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:47,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498223284] [2023-11-17 16:08:47,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498223284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:47,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549773177] [2023-11-17 16:08:47,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:08:47,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:47,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:47,373 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:47,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:08:47,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:47,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:47,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:08:47,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:47,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:47,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:47,726 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 35 treesize of output 43 [2023-11-17 16:08:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:47,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549773177] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:47,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:47,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-11-17 16:08:47,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189862974] [2023-11-17 16:08:47,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:47,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:08:47,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:47,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:08:47,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:08:47,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:08:47,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 151 transitions, 1852 flow. Second operand has 24 states, 24 states have (on average 60.875) internal successors, (1461), 24 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:47,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:47,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:08:47,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:48,466 INFO L124 PetriNetUnfolderBase]: 490/839 cut-off events. [2023-11-17 16:08:48,467 INFO L125 PetriNetUnfolderBase]: For 8200/8200 co-relation queries the response was YES. [2023-11-17 16:08:48,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5558 conditions, 839 events. 490/839 cut-off events. For 8200/8200 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3528 event pairs, 69 based on Foata normal form. 2/841 useless extension candidates. Maximal degree in co-relation 5438. Up to 658 conditions per place. [2023-11-17 16:08:48,479 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 128 selfloop transitions, 70 changer transitions 5/203 dead transitions. [2023-11-17 16:08:48,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 203 transitions, 2651 flow [2023-11-17 16:08:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:08:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:08:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1342 transitions. [2023-11-17 16:08:48,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2766439909297052 [2023-11-17 16:08:48,482 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1342 transitions. [2023-11-17 16:08:48,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1342 transitions. [2023-11-17 16:08:48,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:48,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1342 transitions. [2023-11-17 16:08:48,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.904761904761905) internal successors, (1342), 21 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:48,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:48,490 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:48,490 INFO L175 Difference]: Start difference. First operand has 133 places, 151 transitions, 1852 flow. Second operand 21 states and 1342 transitions. [2023-11-17 16:08:48,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 203 transitions, 2651 flow [2023-11-17 16:08:48,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 203 transitions, 2344 flow, removed 116 selfloop flow, removed 12 redundant places. [2023-11-17 16:08:48,517 INFO L231 Difference]: Finished difference. Result has 145 places, 161 transitions, 1928 flow [2023-11-17 16:08:48,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1928, PETRI_PLACES=145, PETRI_TRANSITIONS=161} [2023-11-17 16:08:48,518 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 124 predicate places. [2023-11-17 16:08:48,518 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 161 transitions, 1928 flow [2023-11-17 16:08:48,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 60.875) internal successors, (1461), 24 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:48,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:48,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:48,525 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 16:08:48,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:48,724 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:48,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:48,724 INFO L85 PathProgramCache]: Analyzing trace with hash 898839359, now seen corresponding path program 15 times [2023-11-17 16:08:48,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:48,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304835264] [2023-11-17 16:08:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:49,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:49,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304835264] [2023-11-17 16:08:49,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304835264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:49,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239424435] [2023-11-17 16:08:49,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:08:49,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:49,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:49,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:49,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:08:49,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:08:49,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:49,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:08:49,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:49,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:49,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:49,630 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 45 [2023-11-17 16:08:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:49,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239424435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:49,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:49,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-11-17 16:08:49,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065269928] [2023-11-17 16:08:49,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:49,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:08:49,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:08:49,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:08:49,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:08:49,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 161 transitions, 1928 flow. Second operand has 24 states, 24 states have (on average 60.958333333333336) internal successors, (1463), 24 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:49,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:49,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:08:49,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:50,403 INFO L124 PetriNetUnfolderBase]: 556/951 cut-off events. [2023-11-17 16:08:50,403 INFO L125 PetriNetUnfolderBase]: For 10222/10222 co-relation queries the response was YES. [2023-11-17 16:08:50,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6478 conditions, 951 events. 556/951 cut-off events. For 10222/10222 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4150 event pairs, 84 based on Foata normal form. 2/953 useless extension candidates. Maximal degree in co-relation 6351. Up to 813 conditions per place. [2023-11-17 16:08:50,425 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 170 selfloop transitions, 45 changer transitions 2/217 dead transitions. [2023-11-17 16:08:50,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 217 transitions, 2981 flow [2023-11-17 16:08:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:08:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:08:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1336 transitions. [2023-11-17 16:08:50,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2754071325499897 [2023-11-17 16:08:50,428 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1336 transitions. [2023-11-17 16:08:50,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1336 transitions. [2023-11-17 16:08:50,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:50,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1336 transitions. [2023-11-17 16:08:50,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.61904761904762) internal successors, (1336), 21 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:50,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:50,436 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:50,436 INFO L175 Difference]: Start difference. First operand has 145 places, 161 transitions, 1928 flow. Second operand 21 states and 1336 transitions. [2023-11-17 16:08:50,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 217 transitions, 2981 flow [2023-11-17 16:08:50,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 217 transitions, 2790 flow, removed 60 selfloop flow, removed 15 redundant places. [2023-11-17 16:08:50,471 INFO L231 Difference]: Finished difference. Result has 155 places, 178 transitions, 2260 flow [2023-11-17 16:08:50,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=1737, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2260, PETRI_PLACES=155, PETRI_TRANSITIONS=178} [2023-11-17 16:08:50,473 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2023-11-17 16:08:50,473 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 178 transitions, 2260 flow [2023-11-17 16:08:50,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 60.958333333333336) internal successors, (1463), 24 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:50,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:50,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:50,488 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 16:08:50,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:50,681 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:50,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:50,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1903933165, now seen corresponding path program 16 times [2023-11-17 16:08:50,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:50,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632546361] [2023-11-17 16:08:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:50,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:51,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:51,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632546361] [2023-11-17 16:08:51,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632546361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:51,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627767406] [2023-11-17 16:08:51,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:08:51,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:51,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:51,294 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:51,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:08:51,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:08:51,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:51,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:08:51,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:51,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:51,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:51,671 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 45 [2023-11-17 16:08:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:51,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627767406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:51,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:51,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-11-17 16:08:51,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893916327] [2023-11-17 16:08:51,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:51,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:08:51,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:08:51,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:08:51,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:08:51,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 178 transitions, 2260 flow. Second operand has 25 states, 25 states have (on average 61.0) internal successors, (1525), 25 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:51,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:51,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:08:51,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:52,581 INFO L124 PetriNetUnfolderBase]: 634/1085 cut-off events. [2023-11-17 16:08:52,582 INFO L125 PetriNetUnfolderBase]: For 13980/13980 co-relation queries the response was YES. [2023-11-17 16:08:52,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7760 conditions, 1085 events. 634/1085 cut-off events. For 13980/13980 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4928 event pairs, 100 based on Foata normal form. 2/1087 useless extension candidates. Maximal degree in co-relation 7624. Up to 922 conditions per place. [2023-11-17 16:08:52,595 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 195 selfloop transitions, 47 changer transitions 2/244 dead transitions. [2023-11-17 16:08:52,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 244 transitions, 3424 flow [2023-11-17 16:08:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:08:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:08:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1346 transitions. [2023-11-17 16:08:52,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2774685631828489 [2023-11-17 16:08:52,598 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1346 transitions. [2023-11-17 16:08:52,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1346 transitions. [2023-11-17 16:08:52,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:52,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1346 transitions. [2023-11-17 16:08:52,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 64.0952380952381) internal successors, (1346), 21 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:52,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:52,606 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:52,607 INFO L175 Difference]: Start difference. First operand has 155 places, 178 transitions, 2260 flow. Second operand 21 states and 1346 transitions. [2023-11-17 16:08:52,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 244 transitions, 3424 flow [2023-11-17 16:08:52,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 244 transitions, 3080 flow, removed 149 selfloop flow, removed 11 redundant places. [2023-11-17 16:08:52,651 INFO L231 Difference]: Finished difference. Result has 169 places, 195 transitions, 2462 flow [2023-11-17 16:08:52,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2462, PETRI_PLACES=169, PETRI_TRANSITIONS=195} [2023-11-17 16:08:52,652 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 148 predicate places. [2023-11-17 16:08:52,652 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 195 transitions, 2462 flow [2023-11-17 16:08:52,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.0) internal successors, (1525), 25 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:52,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:52,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:52,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:52,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:52,859 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:52,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:52,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1805539457, now seen corresponding path program 17 times [2023-11-17 16:08:52,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:52,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740455563] [2023-11-17 16:08:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:52,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:53,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:53,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740455563] [2023-11-17 16:08:53,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740455563] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:53,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802565036] [2023-11-17 16:08:53,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:08:53,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:53,433 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:53,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:08:53,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:08:53,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:53,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 16:08:53,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:53,590 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 16:08:53,629 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 16:08:53,659 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 16:08:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:53,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:53,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802565036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:53,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:53,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 6] total 26 [2023-11-17 16:08:53,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066747390] [2023-11-17 16:08:53,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:53,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 16:08:53,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:53,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 16:08:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2023-11-17 16:08:53,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:08:53,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 195 transitions, 2462 flow. Second operand has 28 states, 28 states have (on average 60.82142857142857) internal successors, (1703), 28 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:53,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:53,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:08:53,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:54,716 INFO L124 PetriNetUnfolderBase]: 695/1186 cut-off events. [2023-11-17 16:08:54,717 INFO L125 PetriNetUnfolderBase]: For 18032/18032 co-relation queries the response was YES. [2023-11-17 16:08:54,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8771 conditions, 1186 events. 695/1186 cut-off events. For 18032/18032 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5484 event pairs, 120 based on Foata normal form. 2/1188 useless extension candidates. Maximal degree in co-relation 8625. Up to 1049 conditions per place. [2023-11-17 16:08:54,732 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 196 selfloop transitions, 50 changer transitions 2/248 dead transitions. [2023-11-17 16:08:54,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 248 transitions, 3539 flow [2023-11-17 16:08:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:08:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:08:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1278 transitions. [2023-11-17 16:08:54,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2766233766233766 [2023-11-17 16:08:54,735 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1278 transitions. [2023-11-17 16:08:54,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1278 transitions. [2023-11-17 16:08:54,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:54,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1278 transitions. [2023-11-17 16:08:54,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:54,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:54,742 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:54,742 INFO L175 Difference]: Start difference. First operand has 169 places, 195 transitions, 2462 flow. Second operand 20 states and 1278 transitions. [2023-11-17 16:08:54,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 248 transitions, 3539 flow [2023-11-17 16:08:54,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 248 transitions, 3186 flow, removed 152 selfloop flow, removed 11 redundant places. [2023-11-17 16:08:54,823 INFO L231 Difference]: Finished difference. Result has 182 places, 208 transitions, 2613 flow [2023-11-17 16:08:54,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2613, PETRI_PLACES=182, PETRI_TRANSITIONS=208} [2023-11-17 16:08:54,824 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 161 predicate places. [2023-11-17 16:08:54,824 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 208 transitions, 2613 flow [2023-11-17 16:08:54,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 60.82142857142857) internal successors, (1703), 28 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:54,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:54,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:54,833 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 16:08:55,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:55,031 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:55,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash 276476633, now seen corresponding path program 18 times [2023-11-17 16:08:55,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:55,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809624341] [2023-11-17 16:08:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:55,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:55,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:55,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809624341] [2023-11-17 16:08:55,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809624341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:55,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536918520] [2023-11-17 16:08:55,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:08:55,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:55,613 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:55,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:08:55,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:08:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:55,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:08:55,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:55,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:55,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:55,961 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 45 [2023-11-17 16:08:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:56,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536918520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:56,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:56,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-11-17 16:08:56,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611229735] [2023-11-17 16:08:56,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:56,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:08:56,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:56,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:08:56,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:08:56,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:08:56,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 208 transitions, 2613 flow. Second operand has 25 states, 25 states have (on average 60.92) internal successors, (1523), 25 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:56,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:56,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:08:56,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:56,691 INFO L124 PetriNetUnfolderBase]: 750/1277 cut-off events. [2023-11-17 16:08:56,691 INFO L125 PetriNetUnfolderBase]: For 24050/24050 co-relation queries the response was YES. [2023-11-17 16:08:56,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9764 conditions, 1277 events. 750/1277 cut-off events. For 24050/24050 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6019 event pairs, 126 based on Foata normal form. 2/1279 useless extension candidates. Maximal degree in co-relation 9608. Up to 1148 conditions per place. [2023-11-17 16:08:56,707 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 205 selfloop transitions, 50 changer transitions 2/257 dead transitions. [2023-11-17 16:08:56,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 257 transitions, 3742 flow [2023-11-17 16:08:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:08:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:08:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1275 transitions. [2023-11-17 16:08:56,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.275974025974026 [2023-11-17 16:08:56,710 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1275 transitions. [2023-11-17 16:08:56,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1275 transitions. [2023-11-17 16:08:56,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:56,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1275 transitions. [2023-11-17 16:08:56,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 63.75) internal successors, (1275), 20 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:56,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:56,715 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:56,715 INFO L175 Difference]: Start difference. First operand has 182 places, 208 transitions, 2613 flow. Second operand 20 states and 1275 transitions. [2023-11-17 16:08:56,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 257 transitions, 3742 flow [2023-11-17 16:08:56,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 257 transitions, 3432 flow, removed 132 selfloop flow, removed 13 redundant places. [2023-11-17 16:08:56,777 INFO L231 Difference]: Finished difference. Result has 193 places, 221 transitions, 2828 flow [2023-11-17 16:08:56,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2828, PETRI_PLACES=193, PETRI_TRANSITIONS=221} [2023-11-17 16:08:56,778 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 172 predicate places. [2023-11-17 16:08:56,778 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 221 transitions, 2828 flow [2023-11-17 16:08:56,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 60.92) internal successors, (1523), 25 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:56,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:56,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:56,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:56,985 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,SelfDestructingSolverStorable22 [2023-11-17 16:08:56,985 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:56,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:56,986 INFO L85 PathProgramCache]: Analyzing trace with hash -928009363, now seen corresponding path program 19 times [2023-11-17 16:08:56,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:56,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445239625] [2023-11-17 16:08:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:56,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:57,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:57,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445239625] [2023-11-17 16:08:57,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445239625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:57,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959332985] [2023-11-17 16:08:57,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:08:57,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:57,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:57,508 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:57,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 16:08:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:57,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:08:57,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:57,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:57,829 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:57,830 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 35 treesize of output 43 [2023-11-17 16:08:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:57,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959332985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:57,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:57,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 22 [2023-11-17 16:08:57,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753638865] [2023-11-17 16:08:57,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:57,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:08:57,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:57,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:08:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:08:57,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:08:57,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 221 transitions, 2828 flow. Second operand has 24 states, 24 states have (on average 60.958333333333336) internal successors, (1463), 24 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:57,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:57,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:08:57,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:58,533 INFO L124 PetriNetUnfolderBase]: 790/1346 cut-off events. [2023-11-17 16:08:58,534 INFO L125 PetriNetUnfolderBase]: For 28494/28494 co-relation queries the response was YES. [2023-11-17 16:08:58,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10530 conditions, 1346 events. 790/1346 cut-off events. For 28494/28494 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6444 event pairs, 134 based on Foata normal form. 1/1347 useless extension candidates. Maximal degree in co-relation 10362. Up to 1220 conditions per place. [2023-11-17 16:08:58,546 INFO L140 encePairwiseOnDemand]: 223/231 looper letters, 209 selfloop transitions, 43 changer transitions 1/253 dead transitions. [2023-11-17 16:08:58,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 253 transitions, 3753 flow [2023-11-17 16:08:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:08:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:08:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 954 transitions. [2023-11-17 16:08:58,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2753246753246753 [2023-11-17 16:08:58,548 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 954 transitions. [2023-11-17 16:08:58,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 954 transitions. [2023-11-17 16:08:58,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:58,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 954 transitions. [2023-11-17 16:08:58,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 63.6) internal successors, (954), 15 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:58,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 231.0) internal successors, (3696), 16 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:58,553 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 231.0) internal successors, (3696), 16 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:58,553 INFO L175 Difference]: Start difference. First operand has 193 places, 221 transitions, 2828 flow. Second operand 15 states and 954 transitions. [2023-11-17 16:08:58,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 253 transitions, 3753 flow [2023-11-17 16:08:58,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 253 transitions, 3428 flow, removed 138 selfloop flow, removed 13 redundant places. [2023-11-17 16:08:58,618 INFO L231 Difference]: Finished difference. Result has 197 places, 231 transitions, 2865 flow [2023-11-17 16:08:58,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2865, PETRI_PLACES=197, PETRI_TRANSITIONS=231} [2023-11-17 16:08:58,619 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 176 predicate places. [2023-11-17 16:08:58,619 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 231 transitions, 2865 flow [2023-11-17 16:08:58,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 60.958333333333336) internal successors, (1463), 24 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:58,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:58,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:58,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:58,825 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,SelfDestructingSolverStorable23 [2023-11-17 16:08:58,825 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:58,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash -852343787, now seen corresponding path program 20 times [2023-11-17 16:08:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:58,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855718467] [2023-11-17 16:08:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:58,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:59,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:59,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855718467] [2023-11-17 16:08:59,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855718467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:59,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678520529] [2023-11-17 16:08:59,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:08:59,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:59,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:59,248 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:59,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 16:08:59,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:59,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:59,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:08:59,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:59,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:59,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:59,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-17 16:08:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:59,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678520529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:59,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:59,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 18 [2023-11-17 16:08:59,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454452713] [2023-11-17 16:08:59,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:59,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:08:59,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:59,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:08:59,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:08:59,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 231 [2023-11-17 16:08:59,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 231 transitions, 2865 flow. Second operand has 20 states, 20 states have (on average 68.05) internal successors, (1361), 20 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:59,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:59,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 231 [2023-11-17 16:08:59,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:00,146 INFO L124 PetriNetUnfolderBase]: 856/1458 cut-off events. [2023-11-17 16:09:00,147 INFO L125 PetriNetUnfolderBase]: For 32925/32925 co-relation queries the response was YES. [2023-11-17 16:09:00,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11652 conditions, 1458 events. 856/1458 cut-off events. For 32925/32925 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7151 event pairs, 170 based on Foata normal form. 2/1460 useless extension candidates. Maximal degree in co-relation 11479. Up to 1320 conditions per place. [2023-11-17 16:09:00,161 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 231 selfloop transitions, 44 changer transitions 2/277 dead transitions. [2023-11-17 16:09:00,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 277 transitions, 4222 flow [2023-11-17 16:09:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:09:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:09:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1267 transitions. [2023-11-17 16:09:00,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047138047138047 [2023-11-17 16:09:00,167 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1267 transitions. [2023-11-17 16:09:00,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1267 transitions. [2023-11-17 16:09:00,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:00,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1267 transitions. [2023-11-17 16:09:00,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 70.38888888888889) internal successors, (1267), 18 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:00,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 231.0) internal successors, (4389), 19 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:00,172 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 231.0) internal successors, (4389), 19 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:00,172 INFO L175 Difference]: Start difference. First operand has 197 places, 231 transitions, 2865 flow. Second operand 18 states and 1267 transitions. [2023-11-17 16:09:00,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 277 transitions, 4222 flow [2023-11-17 16:09:00,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 277 transitions, 4034 flow, removed 82 selfloop flow, removed 6 redundant places. [2023-11-17 16:09:00,256 INFO L231 Difference]: Finished difference. Result has 213 places, 248 transitions, 3346 flow [2023-11-17 16:09:00,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3346, PETRI_PLACES=213, PETRI_TRANSITIONS=248} [2023-11-17 16:09:00,256 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 192 predicate places. [2023-11-17 16:09:00,256 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 248 transitions, 3346 flow [2023-11-17 16:09:00,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 68.05) internal successors, (1361), 20 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:00,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:00,257 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:00,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-17 16:09:00,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:00,462 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:00,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:00,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1868898435, now seen corresponding path program 21 times [2023-11-17 16:09:00,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:00,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492832478] [2023-11-17 16:09:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:00,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:00,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:00,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492832478] [2023-11-17 16:09:00,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492832478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:00,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500757431] [2023-11-17 16:09:00,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:09:00,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:00,801 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:00,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 16:09:00,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:09:00,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:00,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 16:09:00,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:01,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:09:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:01,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:01,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:01,273 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 74 treesize of output 73 [2023-11-17 16:09:01,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:01,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-11-17 16:09:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:01,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500757431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:01,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:01,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-11-17 16:09:01,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880209645] [2023-11-17 16:09:01,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:01,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:09:01,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:01,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:09:01,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=550, Unknown=3, NotChecked=0, Total=650 [2023-11-17 16:09:01,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 231 [2023-11-17 16:09:01,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 248 transitions, 3346 flow. Second operand has 26 states, 26 states have (on average 76.88461538461539) internal successors, (1999), 26 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:01,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:01,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 231 [2023-11-17 16:09:01,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:01,927 INFO L124 PetriNetUnfolderBase]: 902/1542 cut-off events. [2023-11-17 16:09:01,927 INFO L125 PetriNetUnfolderBase]: For 38579/38579 co-relation queries the response was YES. [2023-11-17 16:09:01,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12603 conditions, 1542 events. 902/1542 cut-off events. For 38579/38579 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7792 event pairs, 146 based on Foata normal form. 1/1543 useless extension candidates. Maximal degree in co-relation 12344. Up to 1317 conditions per place. [2023-11-17 16:09:01,942 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 216 selfloop transitions, 64 changer transitions 1/281 dead transitions. [2023-11-17 16:09:01,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 281 transitions, 4264 flow [2023-11-17 16:09:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:09:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:09:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 810 transitions. [2023-11-17 16:09:01,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35064935064935066 [2023-11-17 16:09:01,950 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 810 transitions. [2023-11-17 16:09:01,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 810 transitions. [2023-11-17 16:09:01,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:01,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 810 transitions. [2023-11-17 16:09:01,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:01,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:01,953 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:01,953 INFO L175 Difference]: Start difference. First operand has 213 places, 248 transitions, 3346 flow. Second operand 10 states and 810 transitions. [2023-11-17 16:09:01,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 281 transitions, 4264 flow [2023-11-17 16:09:02,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 281 transitions, 3776 flow, removed 226 selfloop flow, removed 7 redundant places. [2023-11-17 16:09:02,061 INFO L231 Difference]: Finished difference. Result has 218 places, 257 transitions, 3217 flow [2023-11-17 16:09:02,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=2858, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3217, PETRI_PLACES=218, PETRI_TRANSITIONS=257} [2023-11-17 16:09:02,063 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2023-11-17 16:09:02,063 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 257 transitions, 3217 flow [2023-11-17 16:09:02,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 76.88461538461539) internal successors, (1999), 26 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:02,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:02,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:02,071 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 16:09:02,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:02,269 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:02,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2142538427, now seen corresponding path program 22 times [2023-11-17 16:09:02,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:02,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327043702] [2023-11-17 16:09:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:02,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327043702] [2023-11-17 16:09:02,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327043702] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169881782] [2023-11-17 16:09:02,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:09:02,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:02,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:02,757 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:02,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 16:09:02,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:09:02,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:02,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-17 16:09:02,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:02,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-17 16:09:02,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:09:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:03,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:03,141 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_679 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_679) c_~A~0.base))) (= (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4)))))) is different from false [2023-11-17 16:09:03,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:03,159 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 74 treesize of output 73 [2023-11-17 16:09:03,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:03,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-11-17 16:09:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:03,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169881782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:03,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:03,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-11-17 16:09:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837567346] [2023-11-17 16:09:03,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:03,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 16:09:03,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:03,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 16:09:03,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=648, Unknown=1, NotChecked=52, Total=812 [2023-11-17 16:09:03,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 231 [2023-11-17 16:09:03,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 257 transitions, 3217 flow. Second operand has 29 states, 29 states have (on average 63.724137931034484) internal successors, (1848), 29 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:03,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 231 [2023-11-17 16:09:03,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:03,960 INFO L124 PetriNetUnfolderBase]: 947/1614 cut-off events. [2023-11-17 16:09:03,961 INFO L125 PetriNetUnfolderBase]: For 41119/41119 co-relation queries the response was YES. [2023-11-17 16:09:03,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13167 conditions, 1614 events. 947/1614 cut-off events. For 41119/41119 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8188 event pairs, 178 based on Foata normal form. 1/1615 useless extension candidates. Maximal degree in co-relation 12897. Up to 1371 conditions per place. [2023-11-17 16:09:03,973 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 217 selfloop transitions, 87 changer transitions 2/306 dead transitions. [2023-11-17 16:09:03,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 306 transitions, 4468 flow [2023-11-17 16:09:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:09:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:09:03,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1399 transitions. [2023-11-17 16:09:03,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28839414553700266 [2023-11-17 16:09:03,983 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1399 transitions. [2023-11-17 16:09:03,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1399 transitions. [2023-11-17 16:09:03,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:03,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1399 transitions. [2023-11-17 16:09:03,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.61904761904762) internal successors, (1399), 21 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,988 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:03,989 INFO L175 Difference]: Start difference. First operand has 218 places, 257 transitions, 3217 flow. Second operand 21 states and 1399 transitions. [2023-11-17 16:09:03,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 306 transitions, 4468 flow [2023-11-17 16:09:04,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 306 transitions, 4281 flow, removed 62 selfloop flow, removed 5 redundant places. [2023-11-17 16:09:04,080 INFO L231 Difference]: Finished difference. Result has 237 places, 270 transitions, 3729 flow [2023-11-17 16:09:04,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3729, PETRI_PLACES=237, PETRI_TRANSITIONS=270} [2023-11-17 16:09:04,081 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2023-11-17 16:09:04,081 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 270 transitions, 3729 flow [2023-11-17 16:09:04,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 63.724137931034484) internal successors, (1848), 29 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:04,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:04,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:04,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 16:09:04,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 16:09:04,282 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:04,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:04,282 INFO L85 PathProgramCache]: Analyzing trace with hash 241441903, now seen corresponding path program 23 times [2023-11-17 16:09:04,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:04,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379920148] [2023-11-17 16:09:04,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:04,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:04,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:04,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379920148] [2023-11-17 16:09:04,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379920148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:04,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028239646] [2023-11-17 16:09:04,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:09:04,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:04,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:04,830 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:04,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 16:09:04,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:09:04,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:04,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 16:09:04,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:04,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-17 16:09:05,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:09:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:09:05,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:05,237 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_710 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_710) c_~A~0.base))) (= (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset)) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))))) is different from false [2023-11-17 16:09:05,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:05,260 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 74 treesize of output 73 [2023-11-17 16:09:05,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:05,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-11-17 16:09:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:05,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028239646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:05,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:05,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2023-11-17 16:09:05,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580870295] [2023-11-17 16:09:05,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:05,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:09:05,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:05,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:09:05,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=721, Unknown=1, NotChecked=54, Total=870 [2023-11-17 16:09:05,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:09:05,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 270 transitions, 3729 flow. Second operand has 30 states, 30 states have (on average 60.63333333333333) internal successors, (1819), 30 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:05,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:05,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:09:05,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:06,232 INFO L124 PetriNetUnfolderBase]: 979/1667 cut-off events. [2023-11-17 16:09:06,232 INFO L125 PetriNetUnfolderBase]: For 50938/50938 co-relation queries the response was YES. [2023-11-17 16:09:06,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14615 conditions, 1667 events. 979/1667 cut-off events. For 50938/50938 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8533 event pairs, 184 based on Foata normal form. 1/1668 useless extension candidates. Maximal degree in co-relation 14331. Up to 1435 conditions per place. [2023-11-17 16:09:06,247 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 216 selfloop transitions, 93 changer transitions 1/310 dead transitions. [2023-11-17 16:09:06,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 310 transitions, 4840 flow [2023-11-17 16:09:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:09:06,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:09:06,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1333 transitions. [2023-11-17 16:09:06,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27478870336013195 [2023-11-17 16:09:06,251 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1333 transitions. [2023-11-17 16:09:06,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1333 transitions. [2023-11-17 16:09:06,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:06,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1333 transitions. [2023-11-17 16:09:06,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.476190476190474) internal successors, (1333), 21 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:06,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:06,256 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:06,257 INFO L175 Difference]: Start difference. First operand has 237 places, 270 transitions, 3729 flow. Second operand 21 states and 1333 transitions. [2023-11-17 16:09:06,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 310 transitions, 4840 flow [2023-11-17 16:09:06,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 310 transitions, 4342 flow, removed 204 selfloop flow, removed 15 redundant places. [2023-11-17 16:09:06,368 INFO L231 Difference]: Finished difference. Result has 245 places, 277 transitions, 3738 flow [2023-11-17 16:09:06,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3738, PETRI_PLACES=245, PETRI_TRANSITIONS=277} [2023-11-17 16:09:06,368 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2023-11-17 16:09:06,369 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 277 transitions, 3738 flow [2023-11-17 16:09:06,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 60.63333333333333) internal successors, (1819), 30 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:06,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:06,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:06,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-17 16:09:06,571 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,SelfDestructingSolverStorable27 [2023-11-17 16:09:06,572 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:06,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:06,572 INFO L85 PathProgramCache]: Analyzing trace with hash -57580089, now seen corresponding path program 24 times [2023-11-17 16:09:06,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:06,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896032954] [2023-11-17 16:09:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:06,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:07,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:07,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896032954] [2023-11-17 16:09:07,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896032954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:07,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634520120] [2023-11-17 16:09:07,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:09:07,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:07,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:07,094 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:07,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 16:09:07,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:09:07,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:07,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:09:07,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:07,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:07,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:07,444 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 45 [2023-11-17 16:09:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:07,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634520120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:07,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:07,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-11-17 16:09:07,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511256250] [2023-11-17 16:09:07,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:07,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:09:07,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:09:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:09:07,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:09:07,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 277 transitions, 3738 flow. Second operand has 24 states, 24 states have (on average 61.041666666666664) internal successors, (1465), 24 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:07,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:07,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:09:07,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:08,298 INFO L124 PetriNetUnfolderBase]: 1049/1787 cut-off events. [2023-11-17 16:09:08,298 INFO L125 PetriNetUnfolderBase]: For 59553/59553 co-relation queries the response was YES. [2023-11-17 16:09:08,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16148 conditions, 1787 events. 1049/1787 cut-off events. For 59553/59553 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9340 event pairs, 213 based on Foata normal form. 2/1789 useless extension candidates. Maximal degree in co-relation 15857. Up to 1624 conditions per place. [2023-11-17 16:09:08,311 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 288 selfloop transitions, 47 changer transitions 2/337 dead transitions. [2023-11-17 16:09:08,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 337 transitions, 5383 flow [2023-11-17 16:09:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:09:08,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:09:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1342 transitions. [2023-11-17 16:09:08,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2766439909297052 [2023-11-17 16:09:08,314 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1342 transitions. [2023-11-17 16:09:08,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1342 transitions. [2023-11-17 16:09:08,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:08,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1342 transitions. [2023-11-17 16:09:08,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.904761904761905) internal successors, (1342), 21 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:08,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:08,319 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:08,319 INFO L175 Difference]: Start difference. First operand has 245 places, 277 transitions, 3738 flow. Second operand 21 states and 1342 transitions. [2023-11-17 16:09:08,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 337 transitions, 5383 flow [2023-11-17 16:09:08,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 337 transitions, 5041 flow, removed 118 selfloop flow, removed 17 redundant places. [2023-11-17 16:09:08,417 INFO L231 Difference]: Finished difference. Result has 253 places, 293 transitions, 4145 flow [2023-11-17 16:09:08,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4145, PETRI_PLACES=253, PETRI_TRANSITIONS=293} [2023-11-17 16:09:08,418 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2023-11-17 16:09:08,418 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 293 transitions, 4145 flow [2023-11-17 16:09:08,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.041666666666664) internal successors, (1465), 24 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:08,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:08,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:08,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-17 16:09:08,620 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,SelfDestructingSolverStorable28 [2023-11-17 16:09:08,621 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:08,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:08,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1474706513, now seen corresponding path program 25 times [2023-11-17 16:09:08,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:08,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902169299] [2023-11-17 16:09:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:08,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:09,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:09,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902169299] [2023-11-17 16:09:09,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902169299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:09,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312256165] [2023-11-17 16:09:09,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:09:09,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:09,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:09,089 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:09,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 16:09:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:09,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:09:09,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:09:09,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:09,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:09,402 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 45 [2023-11-17 16:09:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:09,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312256165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:09,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:09,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-11-17 16:09:09,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172725061] [2023-11-17 16:09:09,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:09,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:09:09,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:09,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:09:09,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:09:09,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:09:09,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 293 transitions, 4145 flow. Second operand has 26 states, 26 states have (on average 60.88461538461539) internal successors, (1583), 26 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:09,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:09,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:09:09,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:10,115 INFO L124 PetriNetUnfolderBase]: 1104/1878 cut-off events. [2023-11-17 16:09:10,116 INFO L125 PetriNetUnfolderBase]: For 66858/66858 co-relation queries the response was YES. [2023-11-17 16:09:10,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17488 conditions, 1878 events. 1104/1878 cut-off events. For 66858/66858 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9891 event pairs, 245 based on Foata normal form. 2/1880 useless extension candidates. Maximal degree in co-relation 17187. Up to 1749 conditions per place. [2023-11-17 16:09:10,134 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 284 selfloop transitions, 50 changer transitions 2/336 dead transitions. [2023-11-17 16:09:10,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 336 transitions, 5638 flow [2023-11-17 16:09:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:09:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:09:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1209 transitions. [2023-11-17 16:09:10,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27546138072453863 [2023-11-17 16:09:10,138 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1209 transitions. [2023-11-17 16:09:10,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1209 transitions. [2023-11-17 16:09:10,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:10,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1209 transitions. [2023-11-17 16:09:10,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 63.63157894736842) internal successors, (1209), 19 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:10,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 231.0) internal successors, (4620), 20 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:10,144 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 231.0) internal successors, (4620), 20 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:10,144 INFO L175 Difference]: Start difference. First operand has 253 places, 293 transitions, 4145 flow. Second operand 19 states and 1209 transitions. [2023-11-17 16:09:10,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 336 transitions, 5638 flow [2023-11-17 16:09:10,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 336 transitions, 5095 flow, removed 238 selfloop flow, removed 12 redundant places. [2023-11-17 16:09:10,273 INFO L231 Difference]: Finished difference. Result has 264 places, 306 transitions, 4309 flow [2023-11-17 16:09:10,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=3610, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4309, PETRI_PLACES=264, PETRI_TRANSITIONS=306} [2023-11-17 16:09:10,274 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2023-11-17 16:09:10,274 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 306 transitions, 4309 flow [2023-11-17 16:09:10,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 60.88461538461539) internal successors, (1583), 26 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:10,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:10,274 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:10,279 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 16:09:10,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:10,477 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:10,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash 738244693, now seen corresponding path program 26 times [2023-11-17 16:09:10,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:10,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253353684] [2023-11-17 16:09:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:10,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:10,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253353684] [2023-11-17 16:09:10,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253353684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313841899] [2023-11-17 16:09:10,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:09:10,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:10,795 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:10,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 16:09:10,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:09:10,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:10,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:09:10,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:11,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:11,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:11,087 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 45 [2023-11-17 16:09:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:11,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313841899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:11,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:11,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-11-17 16:09:11,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990715940] [2023-11-17 16:09:11,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:11,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:09:11,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:09:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:09:11,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 231 [2023-11-17 16:09:11,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 306 transitions, 4309 flow. Second operand has 24 states, 24 states have (on average 69.08333333333333) internal successors, (1658), 24 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:11,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:11,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 231 [2023-11-17 16:09:11,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:11,864 INFO L124 PetriNetUnfolderBase]: 1165/1979 cut-off events. [2023-11-17 16:09:11,865 INFO L125 PetriNetUnfolderBase]: For 82077/82077 co-relation queries the response was YES. [2023-11-17 16:09:11,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18919 conditions, 1979 events. 1165/1979 cut-off events. For 82077/82077 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 10552 event pairs, 253 based on Foata normal form. 2/1981 useless extension candidates. Maximal degree in co-relation 18602. Up to 1842 conditions per place. [2023-11-17 16:09:11,884 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 302 selfloop transitions, 50 changer transitions 2/354 dead transitions. [2023-11-17 16:09:11,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 354 transitions, 5822 flow [2023-11-17 16:09:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:09:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:09:11,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1435 transitions. [2023-11-17 16:09:11,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3106060606060606 [2023-11-17 16:09:11,886 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1435 transitions. [2023-11-17 16:09:11,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1435 transitions. [2023-11-17 16:09:11,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:11,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1435 transitions. [2023-11-17 16:09:11,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 71.75) internal successors, (1435), 20 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:11,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:11,892 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:11,892 INFO L175 Difference]: Start difference. First operand has 264 places, 306 transitions, 4309 flow. Second operand 20 states and 1435 transitions. [2023-11-17 16:09:11,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 354 transitions, 5822 flow [2023-11-17 16:09:12,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 354 transitions, 5381 flow, removed 198 selfloop flow, removed 12 redundant places. [2023-11-17 16:09:12,042 INFO L231 Difference]: Finished difference. Result has 276 places, 319 transitions, 4516 flow [2023-11-17 16:09:12,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=3868, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4516, PETRI_PLACES=276, PETRI_TRANSITIONS=319} [2023-11-17 16:09:12,043 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2023-11-17 16:09:12,043 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 319 transitions, 4516 flow [2023-11-17 16:09:12,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 69.08333333333333) internal successors, (1658), 24 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:12,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:12,043 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:12,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 16:09:12,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:12,244 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:12,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:12,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1648640455, now seen corresponding path program 27 times [2023-11-17 16:09:12,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:12,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110789551] [2023-11-17 16:09:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:12,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:12,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:12,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110789551] [2023-11-17 16:09:12,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110789551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:12,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022236676] [2023-11-17 16:09:12,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:09:12,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:12,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:12,682 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:12,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 16:09:12,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:09:12,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:12,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:09:12,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:09:12,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:13,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:13,069 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 35 treesize of output 43 [2023-11-17 16:09:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:13,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022236676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:13,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:13,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-11-17 16:09:13,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910380616] [2023-11-17 16:09:13,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:13,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:09:13,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:13,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:09:13,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:09:13,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:09:13,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 319 transitions, 4516 flow. Second operand has 26 states, 26 states have (on average 60.96153846153846) internal successors, (1585), 26 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:13,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:13,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:09:13,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:13,868 INFO L124 PetriNetUnfolderBase]: 1231/2087 cut-off events. [2023-11-17 16:09:13,869 INFO L125 PetriNetUnfolderBase]: For 101352/101352 co-relation queries the response was YES. [2023-11-17 16:09:13,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21028 conditions, 2087 events. 1231/2087 cut-off events. For 101352/101352 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 11220 event pairs, 279 based on Foata normal form. 2/2089 useless extension candidates. Maximal degree in co-relation 20699. Up to 1937 conditions per place. [2023-11-17 16:09:13,888 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 312 selfloop transitions, 56 changer transitions 2/370 dead transitions. [2023-11-17 16:09:13,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 370 transitions, 6307 flow [2023-11-17 16:09:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:09:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:09:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1276 transitions. [2023-11-17 16:09:13,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2761904761904762 [2023-11-17 16:09:13,890 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1276 transitions. [2023-11-17 16:09:13,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1276 transitions. [2023-11-17 16:09:13,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:13,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1276 transitions. [2023-11-17 16:09:13,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 63.8) internal successors, (1276), 20 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:13,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:13,896 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:13,896 INFO L175 Difference]: Start difference. First operand has 276 places, 319 transitions, 4516 flow. Second operand 20 states and 1276 transitions. [2023-11-17 16:09:13,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 370 transitions, 6307 flow [2023-11-17 16:09:14,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 370 transitions, 5903 flow, removed 178 selfloop flow, removed 13 redundant places. [2023-11-17 16:09:14,059 INFO L231 Difference]: Finished difference. Result has 288 places, 335 transitions, 5012 flow [2023-11-17 16:09:14,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=4112, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5012, PETRI_PLACES=288, PETRI_TRANSITIONS=335} [2023-11-17 16:09:14,060 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-11-17 16:09:14,060 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 335 transitions, 5012 flow [2023-11-17 16:09:14,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 60.96153846153846) internal successors, (1585), 26 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:14,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:14,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:14,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-17 16:09:14,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:14,261 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:14,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1055738361, now seen corresponding path program 28 times [2023-11-17 16:09:14,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:14,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351611063] [2023-11-17 16:09:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:14,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:14,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351611063] [2023-11-17 16:09:14,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351611063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199565798] [2023-11-17 16:09:14,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:09:14,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:14,720 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:14,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 16:09:14,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:09:14,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:14,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:09:14,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:14,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:15,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:15,053 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 35 treesize of output 43 [2023-11-17 16:09:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:15,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199565798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:15,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:15,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-11-17 16:09:15,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104103637] [2023-11-17 16:09:15,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:15,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:09:15,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:09:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:09:15,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:09:15,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 335 transitions, 5012 flow. Second operand has 24 states, 24 states have (on average 60.958333333333336) internal successors, (1463), 24 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:15,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:15,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:09:15,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:15,930 INFO L124 PetriNetUnfolderBase]: 1253/2126 cut-off events. [2023-11-17 16:09:15,931 INFO L125 PetriNetUnfolderBase]: For 119322/119322 co-relation queries the response was YES. [2023-11-17 16:09:15,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22128 conditions, 2126 events. 1253/2126 cut-off events. For 119322/119322 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11500 event pairs, 281 based on Foata normal form. 1/2127 useless extension candidates. Maximal degree in co-relation 21786. Up to 2022 conditions per place. [2023-11-17 16:09:15,952 INFO L140 encePairwiseOnDemand]: 223/231 looper letters, 321 selfloop transitions, 38 changer transitions 1/360 dead transitions. [2023-11-17 16:09:15,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 360 transitions, 6158 flow [2023-11-17 16:09:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:09:15,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:09:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 890 transitions. [2023-11-17 16:09:15,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2752009894867038 [2023-11-17 16:09:15,954 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 890 transitions. [2023-11-17 16:09:15,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 890 transitions. [2023-11-17 16:09:15,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:15,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 890 transitions. [2023-11-17 16:09:15,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 63.57142857142857) internal successors, (890), 14 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:15,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:15,957 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:15,957 INFO L175 Difference]: Start difference. First operand has 288 places, 335 transitions, 5012 flow. Second operand 14 states and 890 transitions. [2023-11-17 16:09:15,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 360 transitions, 6158 flow [2023-11-17 16:09:16,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 360 transitions, 5581 flow, removed 264 selfloop flow, removed 12 redundant places. [2023-11-17 16:09:16,184 INFO L231 Difference]: Finished difference. Result has 292 places, 340 transitions, 4742 flow [2023-11-17 16:09:16,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=4435, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4742, PETRI_PLACES=292, PETRI_TRANSITIONS=340} [2023-11-17 16:09:16,185 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 271 predicate places. [2023-11-17 16:09:16,185 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 340 transitions, 4742 flow [2023-11-17 16:09:16,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 60.958333333333336) internal successors, (1463), 24 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:16,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:16,185 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:16,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-17 16:09:16,386 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,SelfDestructingSolverStorable32 [2023-11-17 16:09:16,387 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:16,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:16,387 INFO L85 PathProgramCache]: Analyzing trace with hash -101854167, now seen corresponding path program 29 times [2023-11-17 16:09:16,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:16,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422511427] [2023-11-17 16:09:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:16,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:16,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:16,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422511427] [2023-11-17 16:09:16,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422511427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:16,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426124035] [2023-11-17 16:09:16,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:09:16,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:16,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:16,867 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:16,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 16:09:16,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:09:16,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:16,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:09:16,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:09:17,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:17,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:17,276 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 35 treesize of output 43 [2023-11-17 16:09:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:17,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426124035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:17,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:17,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-11-17 16:09:17,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998074904] [2023-11-17 16:09:17,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:17,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:09:17,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:17,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:09:17,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:09:17,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:09:17,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 340 transitions, 4742 flow. Second operand has 26 states, 26 states have (on average 60.88461538461539) internal successors, (1583), 26 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:17,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:17,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:09:17,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:18,269 INFO L124 PetriNetUnfolderBase]: 1280/2172 cut-off events. [2023-11-17 16:09:18,269 INFO L125 PetriNetUnfolderBase]: For 121884/121884 co-relation queries the response was YES. [2023-11-17 16:09:18,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22306 conditions, 2172 events. 1280/2172 cut-off events. For 121884/121884 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 11817 event pairs, 291 based on Foata normal form. 1/2173 useless extension candidates. Maximal degree in co-relation 21959. Up to 2058 conditions per place. [2023-11-17 16:09:18,292 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 321 selfloop transitions, 49 changer transitions 1/371 dead transitions. [2023-11-17 16:09:18,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 371 transitions, 5971 flow [2023-11-17 16:09:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:09:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:09:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1264 transitions. [2023-11-17 16:09:18,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2735930735930736 [2023-11-17 16:09:18,294 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1264 transitions. [2023-11-17 16:09:18,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1264 transitions. [2023-11-17 16:09:18,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:18,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1264 transitions. [2023-11-17 16:09:18,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 63.2) internal successors, (1264), 20 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:18,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:18,299 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 231.0) internal successors, (4851), 21 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:18,299 INFO L175 Difference]: Start difference. First operand has 292 places, 340 transitions, 4742 flow. Second operand 20 states and 1264 transitions. [2023-11-17 16:09:18,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 371 transitions, 5971 flow [2023-11-17 16:09:18,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 371 transitions, 5834 flow, removed 46 selfloop flow, removed 10 redundant places. [2023-11-17 16:09:18,487 INFO L231 Difference]: Finished difference. Result has 304 places, 346 transitions, 5030 flow [2023-11-17 16:09:18,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5030, PETRI_PLACES=304, PETRI_TRANSITIONS=346} [2023-11-17 16:09:18,487 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2023-11-17 16:09:18,487 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 346 transitions, 5030 flow [2023-11-17 16:09:18,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 60.88461538461539) internal successors, (1583), 26 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:18,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:18,488 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:18,492 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 16:09:18,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:18,689 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:18,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:18,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1139187756, now seen corresponding path program 30 times [2023-11-17 16:09:18,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:18,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133331657] [2023-11-17 16:09:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:18,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:18,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:18,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133331657] [2023-11-17 16:09:18,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133331657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:18,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025482815] [2023-11-17 16:09:18,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:09:18,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:18,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:18,760 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:18,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 16:09:18,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:09:18,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:18,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:09:18,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:18,948 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 16:09:18,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:19,013 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 16:09:19,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025482815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:19,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:19,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:09:19,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853031507] [2023-11-17 16:09:19,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:19,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:09:19,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:19,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:09:19,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:09:19,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:09:19,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 346 transitions, 5030 flow. Second operand has 19 states, 19 states have (on average 85.10526315789474) internal successors, (1617), 19 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:19,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:19,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:09:19,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:19,703 INFO L124 PetriNetUnfolderBase]: 1731/3074 cut-off events. [2023-11-17 16:09:19,703 INFO L125 PetriNetUnfolderBase]: For 204047/204047 co-relation queries the response was YES. [2023-11-17 16:09:19,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32377 conditions, 3074 events. 1731/3074 cut-off events. For 204047/204047 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19145 event pairs, 631 based on Foata normal form. 158/3232 useless extension candidates. Maximal degree in co-relation 32020. Up to 1869 conditions per place. [2023-11-17 16:09:19,737 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 431 selfloop transitions, 67 changer transitions 27/525 dead transitions. [2023-11-17 16:09:19,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 525 transitions, 8863 flow [2023-11-17 16:09:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:09:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:09:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 802 transitions. [2023-11-17 16:09:19,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38576238576238575 [2023-11-17 16:09:19,739 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 802 transitions. [2023-11-17 16:09:19,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 802 transitions. [2023-11-17 16:09:19,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:19,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 802 transitions. [2023-11-17 16:09:19,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 89.11111111111111) internal successors, (802), 9 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:19,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:19,742 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:19,742 INFO L175 Difference]: Start difference. First operand has 304 places, 346 transitions, 5030 flow. Second operand 9 states and 802 transitions. [2023-11-17 16:09:19,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 525 transitions, 8863 flow [2023-11-17 16:09:20,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 525 transitions, 8466 flow, removed 152 selfloop flow, removed 18 redundant places. [2023-11-17 16:09:20,038 INFO L231 Difference]: Finished difference. Result has 297 places, 370 transitions, 5550 flow [2023-11-17 16:09:20,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=4603, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5550, PETRI_PLACES=297, PETRI_TRANSITIONS=370} [2023-11-17 16:09:20,038 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 276 predicate places. [2023-11-17 16:09:20,038 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 370 transitions, 5550 flow [2023-11-17 16:09:20,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.10526315789474) internal successors, (1617), 19 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:20,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:20,039 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:20,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 16:09:20,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:20,239 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:20,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1528191561, now seen corresponding path program 31 times [2023-11-17 16:09:20,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:20,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041067649] [2023-11-17 16:09:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:20,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:09:20,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:20,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041067649] [2023-11-17 16:09:20,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041067649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:20,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804210427] [2023-11-17 16:09:20,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:09:20,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:20,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:20,317 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:20,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 16:09:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:20,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:09:20,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:09:20,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:09:20,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804210427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:20,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:20,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:09:20,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362429018] [2023-11-17 16:09:20,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:20,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:09:20,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:09:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:09:20,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:09:20,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 370 transitions, 5550 flow. Second operand has 19 states, 19 states have (on average 84.78947368421052) internal successors, (1611), 19 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:20,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:20,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:09:20,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:21,240 INFO L124 PetriNetUnfolderBase]: 1438/2659 cut-off events. [2023-11-17 16:09:21,240 INFO L125 PetriNetUnfolderBase]: For 168226/168226 co-relation queries the response was YES. [2023-11-17 16:09:21,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27748 conditions, 2659 events. 1438/2659 cut-off events. For 168226/168226 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16960 event pairs, 587 based on Foata normal form. 148/2807 useless extension candidates. Maximal degree in co-relation 27585. Up to 1869 conditions per place. [2023-11-17 16:09:21,268 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 285 selfloop transitions, 4 changer transitions 134/423 dead transitions. [2023-11-17 16:09:21,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 423 transitions, 6838 flow [2023-11-17 16:09:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:09:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:09:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 801 transitions. [2023-11-17 16:09:21,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2023-11-17 16:09:21,270 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 801 transitions. [2023-11-17 16:09:21,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 801 transitions. [2023-11-17 16:09:21,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:21,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 801 transitions. [2023-11-17 16:09:21,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:21,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:21,272 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:21,273 INFO L175 Difference]: Start difference. First operand has 297 places, 370 transitions, 5550 flow. Second operand 9 states and 801 transitions. [2023-11-17 16:09:21,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 423 transitions, 6838 flow [2023-11-17 16:09:21,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 423 transitions, 6711 flow, removed 59 selfloop flow, removed 6 redundant places. [2023-11-17 16:09:21,607 INFO L231 Difference]: Finished difference. Result has 298 places, 289 transitions, 4352 flow [2023-11-17 16:09:21,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4352, PETRI_PLACES=298, PETRI_TRANSITIONS=289} [2023-11-17 16:09:21,608 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 277 predicate places. [2023-11-17 16:09:21,608 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 289 transitions, 4352 flow [2023-11-17 16:09:21,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 84.78947368421052) internal successors, (1611), 19 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:21,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:21,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:21,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 16:09:21,814 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,SelfDestructingSolverStorable35 [2023-11-17 16:09:21,814 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:21,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash 562374354, now seen corresponding path program 32 times [2023-11-17 16:09:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:21,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925521686] [2023-11-17 16:09:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:21,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:21,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:21,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925521686] [2023-11-17 16:09:21,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925521686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:21,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465244564] [2023-11-17 16:09:21,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:09:21,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:21,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:21,896 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:21,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 16:09:22,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:09:22,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:22,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:09:22,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:22,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:22,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465244564] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:22,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:22,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:09:22,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747989404] [2023-11-17 16:09:22,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:22,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:09:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:09:22,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:09:22,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:09:22,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 289 transitions, 4352 flow. Second operand has 19 states, 19 states have (on average 84.94736842105263) internal successors, (1614), 19 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:22,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:09:22,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:22,561 INFO L124 PetriNetUnfolderBase]: 891/1539 cut-off events. [2023-11-17 16:09:22,561 INFO L125 PetriNetUnfolderBase]: For 115875/115875 co-relation queries the response was YES. [2023-11-17 16:09:22,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15863 conditions, 1539 events. 891/1539 cut-off events. For 115875/115875 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7934 event pairs, 183 based on Foata normal form. 202/1741 useless extension candidates. Maximal degree in co-relation 15714. Up to 846 conditions per place. [2023-11-17 16:09:22,577 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 184 selfloop transitions, 104 changer transitions 0/288 dead transitions. [2023-11-17 16:09:22,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 288 transitions, 5198 flow [2023-11-17 16:09:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:09:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:09:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 872 transitions. [2023-11-17 16:09:22,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774891774891775 [2023-11-17 16:09:22,579 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 872 transitions. [2023-11-17 16:09:22,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 872 transitions. [2023-11-17 16:09:22,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:22,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 872 transitions. [2023-11-17 16:09:22,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.2) internal successors, (872), 10 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,581 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,581 INFO L175 Difference]: Start difference. First operand has 298 places, 289 transitions, 4352 flow. Second operand 10 states and 872 transitions. [2023-11-17 16:09:22,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 288 transitions, 5198 flow [2023-11-17 16:09:22,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 288 transitions, 4640 flow, removed 218 selfloop flow, removed 27 redundant places. [2023-11-17 16:09:22,714 INFO L231 Difference]: Finished difference. Result has 259 places, 272 transitions, 4014 flow [2023-11-17 16:09:22,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4014, PETRI_PLACES=259, PETRI_TRANSITIONS=272} [2023-11-17 16:09:22,715 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 238 predicate places. [2023-11-17 16:09:22,715 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 272 transitions, 4014 flow [2023-11-17 16:09:22,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 84.94736842105263) internal successors, (1614), 19 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:22,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:22,716 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:22,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 16:09:22,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 16:09:22,916 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:22,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:22,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1101254541, now seen corresponding path program 33 times [2023-11-17 16:09:22,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:22,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43939686] [2023-11-17 16:09:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:22,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:23,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:23,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43939686] [2023-11-17 16:09:23,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43939686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:23,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488515741] [2023-11-17 16:09:23,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:09:23,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:23,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:23,002 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:23,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 16:09:23,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:09:23,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:23,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:09:23,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:23,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:23,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488515741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:23,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:23,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 16:09:23,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145418303] [2023-11-17 16:09:23,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:23,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:09:23,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:23,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:09:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:09:23,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-17 16:09:23,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 272 transitions, 4014 flow. Second operand has 19 states, 19 states have (on average 85.0) internal successors, (1615), 19 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:23,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:23,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-17 16:09:23,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:23,618 INFO L124 PetriNetUnfolderBase]: 674/1176 cut-off events. [2023-11-17 16:09:23,618 INFO L125 PetriNetUnfolderBase]: For 77168/77168 co-relation queries the response was YES. [2023-11-17 16:09:23,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12178 conditions, 1176 events. 674/1176 cut-off events. For 77168/77168 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5583 event pairs, 208 based on Foata normal form. 116/1292 useless extension candidates. Maximal degree in co-relation 12066. Up to 764 conditions per place. [2023-11-17 16:09:23,630 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 166 selfloop transitions, 97 changer transitions 0/263 dead transitions. [2023-11-17 16:09:23,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 263 transitions, 4655 flow [2023-11-17 16:09:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:09:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:09:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 872 transitions. [2023-11-17 16:09:23,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774891774891775 [2023-11-17 16:09:23,632 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 872 transitions. [2023-11-17 16:09:23,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 872 transitions. [2023-11-17 16:09:23,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:23,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 872 transitions. [2023-11-17 16:09:23,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.2) internal successors, (872), 10 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:23,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:23,634 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:23,634 INFO L175 Difference]: Start difference. First operand has 259 places, 272 transitions, 4014 flow. Second operand 10 states and 872 transitions. [2023-11-17 16:09:23,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 263 transitions, 4655 flow [2023-11-17 16:09:23,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 263 transitions, 4072 flow, removed 214 selfloop flow, removed 20 redundant places. [2023-11-17 16:09:23,730 INFO L231 Difference]: Finished difference. Result has 245 places, 249 transitions, 3553 flow [2023-11-17 16:09:23,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3553, PETRI_PLACES=245, PETRI_TRANSITIONS=249} [2023-11-17 16:09:23,731 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2023-11-17 16:09:23,731 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 249 transitions, 3553 flow [2023-11-17 16:09:23,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.0) internal successors, (1615), 19 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:23,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:23,732 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:23,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-17 16:09:23,935 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,SelfDestructingSolverStorable37 [2023-11-17 16:09:23,935 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:23,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1807836176, now seen corresponding path program 34 times [2023-11-17 16:09:23,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:23,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783022875] [2023-11-17 16:09:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:23,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:24,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:24,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783022875] [2023-11-17 16:09:24,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783022875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:24,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337251253] [2023-11-17 16:09:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:09:24,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:24,718 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:24,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 16:09:24,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:09:24,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:24,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-17 16:09:24,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:24,988 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 16:09:25,033 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 16:09:25,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:25,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 18 [2023-11-17 16:09:25,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:25,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:25,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 16:09:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:25,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:25,556 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1033 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1033) c_~A~0.base)) (.cse1 (* c_~N~0 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 (- 4))) (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset .cse1 (- 8))))) c_~counter~0)) is different from false [2023-11-17 16:09:25,561 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1033 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1033) c_~A~0.base)) (.cse1 (* c_~N~0 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 (- 4))) (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset .cse1 (- 8))))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0))) is different from false [2023-11-17 16:09:25,566 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1033 (Array Int Int))) (= (let ((.cse0 (select |c_#memory_int| c_~A~0.base)) (.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1)) c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse1 4)))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1033) c_~A~0.base)) (.cse3 (* c_~N~0 4))) (+ (select .cse2 (+ c_~A~0.offset .cse3 (- 4))) (select .cse2 c_~A~0.offset) (select .cse2 (+ c_~A~0.offset .cse3 (- 8))))))) is different from false [2023-11-17 16:09:25,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:25,725 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 147 treesize of output 88 [2023-11-17 16:09:25,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:25,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 766 treesize of output 614 [2023-11-17 16:09:25,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:25,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 114 [2023-11-17 16:09:25,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:25,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 81 [2023-11-17 16:09:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-17 16:09:26,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337251253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:26,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:26,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-11-17 16:09:26,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647126228] [2023-11-17 16:09:26,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:26,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-17 16:09:26,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:26,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-17 16:09:26,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1562, Unknown=7, NotChecked=246, Total=1980 [2023-11-17 16:09:26,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:09:26,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 249 transitions, 3553 flow. Second operand has 45 states, 45 states have (on average 60.44444444444444) internal successors, (2720), 45 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:26,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:26,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:09:26,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:28,118 INFO L124 PetriNetUnfolderBase]: 883/1545 cut-off events. [2023-11-17 16:09:28,119 INFO L125 PetriNetUnfolderBase]: For 58915/58915 co-relation queries the response was YES. [2023-11-17 16:09:28,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14730 conditions, 1545 events. 883/1545 cut-off events. For 58915/58915 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7870 event pairs, 115 based on Foata normal form. 1/1546 useless extension candidates. Maximal degree in co-relation 14628. Up to 1115 conditions per place. [2023-11-17 16:09:28,139 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 262 selfloop transitions, 160 changer transitions 3/425 dead transitions. [2023-11-17 16:09:28,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 425 transitions, 6840 flow [2023-11-17 16:09:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:09:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:09:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2546 transitions. [2023-11-17 16:09:28,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27554112554112553 [2023-11-17 16:09:28,143 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2546 transitions. [2023-11-17 16:09:28,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2546 transitions. [2023-11-17 16:09:28,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:28,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2546 transitions. [2023-11-17 16:09:28,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 63.65) internal successors, (2546), 40 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:28,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 231.0) internal successors, (9471), 41 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:28,153 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 231.0) internal successors, (9471), 41 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:28,153 INFO L175 Difference]: Start difference. First operand has 245 places, 249 transitions, 3553 flow. Second operand 40 states and 2546 transitions. [2023-11-17 16:09:28,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 425 transitions, 6840 flow [2023-11-17 16:09:28,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 425 transitions, 6390 flow, removed 130 selfloop flow, removed 16 redundant places. [2023-11-17 16:09:28,254 INFO L231 Difference]: Finished difference. Result has 278 places, 334 transitions, 5572 flow [2023-11-17 16:09:28,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=3289, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5572, PETRI_PLACES=278, PETRI_TRANSITIONS=334} [2023-11-17 16:09:28,255 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-11-17 16:09:28,255 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 334 transitions, 5572 flow [2023-11-17 16:09:28,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 60.44444444444444) internal successors, (2720), 45 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:28,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:28,256 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:28,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-17 16:09:28,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 16:09:28,458 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:28,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash 129312818, now seen corresponding path program 35 times [2023-11-17 16:09:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258698956] [2023-11-17 16:09:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:28,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:28,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:28,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258698956] [2023-11-17 16:09:28,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258698956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:28,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806703554] [2023-11-17 16:09:28,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:09:28,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:28,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:28,997 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:29,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 16:09:29,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:09:29,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:29,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 16:09:29,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:29,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:29,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:29,480 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 52 treesize of output 89 [2023-11-17 16:09:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:29,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806703554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:29,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:29,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 26 [2023-11-17 16:09:29,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539224877] [2023-11-17 16:09:29,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:29,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 16:09:29,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:29,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 16:09:29,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-11-17 16:09:29,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 231 [2023-11-17 16:09:29,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 334 transitions, 5572 flow. Second operand has 28 states, 28 states have (on average 67.85714285714286) internal successors, (1900), 28 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:29,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:29,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 231 [2023-11-17 16:09:29,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:30,262 INFO L124 PetriNetUnfolderBase]: 957/1674 cut-off events. [2023-11-17 16:09:30,262 INFO L125 PetriNetUnfolderBase]: For 57477/57477 co-relation queries the response was YES. [2023-11-17 16:09:30,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15795 conditions, 1674 events. 957/1674 cut-off events. For 57477/57477 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8634 event pairs, 189 based on Foata normal form. 1/1675 useless extension candidates. Maximal degree in co-relation 15691. Up to 1472 conditions per place. [2023-11-17 16:09:30,278 INFO L140 encePairwiseOnDemand]: 222/231 looper letters, 310 selfloop transitions, 83 changer transitions 1/394 dead transitions. [2023-11-17 16:09:30,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 394 transitions, 7230 flow [2023-11-17 16:09:30,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:09:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:09:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1202 transitions. [2023-11-17 16:09:30,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30608607079195316 [2023-11-17 16:09:30,280 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1202 transitions. [2023-11-17 16:09:30,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1202 transitions. [2023-11-17 16:09:30,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:30,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1202 transitions. [2023-11-17 16:09:30,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 70.70588235294117) internal successors, (1202), 17 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:30,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 231.0) internal successors, (4158), 18 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:30,284 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 231.0) internal successors, (4158), 18 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:30,284 INFO L175 Difference]: Start difference. First operand has 278 places, 334 transitions, 5572 flow. Second operand 17 states and 1202 transitions. [2023-11-17 16:09:30,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 394 transitions, 7230 flow [2023-11-17 16:09:30,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 394 transitions, 6193 flow, removed 473 selfloop flow, removed 13 redundant places. [2023-11-17 16:09:30,388 INFO L231 Difference]: Finished difference. Result has 288 places, 362 transitions, 5483 flow [2023-11-17 16:09:30,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=4655, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5483, PETRI_PLACES=288, PETRI_TRANSITIONS=362} [2023-11-17 16:09:30,389 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-11-17 16:09:30,389 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 362 transitions, 5483 flow [2023-11-17 16:09:30,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 67.85714285714286) internal successors, (1900), 28 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:30,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:30,390 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:30,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-17 16:09:30,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 16:09:30,595 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:30,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:30,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1240639026, now seen corresponding path program 36 times [2023-11-17 16:09:30,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:30,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142232253] [2023-11-17 16:09:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:30,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:31,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:31,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142232253] [2023-11-17 16:09:31,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142232253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:31,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868776910] [2023-11-17 16:09:31,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:09:31,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:31,266 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:31,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 16:09:31,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-17 16:09:31,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:31,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-17 16:09:31,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:31,469 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 16:09:31,506 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 16:09:31,530 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 16:09:31,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:31,729 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 19 treesize of output 16 [2023-11-17 16:09:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:31,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:09:32,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868776910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:32,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:32,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 10] total 36 [2023-11-17 16:09:32,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613993458] [2023-11-17 16:09:32,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:32,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 16:09:32,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:32,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 16:09:32,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2023-11-17 16:09:32,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:09:32,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 362 transitions, 5483 flow. Second operand has 38 states, 38 states have (on average 60.55263157894737) internal successors, (2301), 38 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:32,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:32,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:09:32,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:33,875 INFO L124 PetriNetUnfolderBase]: 1016/1780 cut-off events. [2023-11-17 16:09:33,875 INFO L125 PetriNetUnfolderBase]: For 58095/58095 co-relation queries the response was YES. [2023-11-17 16:09:33,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15828 conditions, 1780 events. 1016/1780 cut-off events. For 58095/58095 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9382 event pairs, 158 based on Foata normal form. 1/1781 useless extension candidates. Maximal degree in co-relation 15721. Up to 1472 conditions per place. [2023-11-17 16:09:33,894 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 285 selfloop transitions, 150 changer transitions 5/440 dead transitions. [2023-11-17 16:09:33,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 440 transitions, 7525 flow [2023-11-17 16:09:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:09:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:09:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2196 transitions. [2023-11-17 16:09:33,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2716141001855288 [2023-11-17 16:09:33,896 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2196 transitions. [2023-11-17 16:09:33,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2196 transitions. [2023-11-17 16:09:33,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:33,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2196 transitions. [2023-11-17 16:09:33,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 62.74285714285714) internal successors, (2196), 35 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:33,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 231.0) internal successors, (8316), 36 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:33,902 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 231.0) internal successors, (8316), 36 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:33,902 INFO L175 Difference]: Start difference. First operand has 288 places, 362 transitions, 5483 flow. Second operand 35 states and 2196 transitions. [2023-11-17 16:09:33,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 440 transitions, 7525 flow [2023-11-17 16:09:33,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 440 transitions, 7069 flow, removed 200 selfloop flow, removed 8 redundant places. [2023-11-17 16:09:33,994 INFO L231 Difference]: Finished difference. Result has 319 places, 392 transitions, 6429 flow [2023-11-17 16:09:33,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=5143, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6429, PETRI_PLACES=319, PETRI_TRANSITIONS=392} [2023-11-17 16:09:33,995 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 298 predicate places. [2023-11-17 16:09:33,995 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 392 transitions, 6429 flow [2023-11-17 16:09:33,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 60.55263157894737) internal successors, (2301), 38 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:33,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:33,996 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:34,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-17 16:09:34,196 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,SelfDestructingSolverStorable40 [2023-11-17 16:09:34,196 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:34,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:34,197 INFO L85 PathProgramCache]: Analyzing trace with hash -431565024, now seen corresponding path program 37 times [2023-11-17 16:09:34,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:34,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838274531] [2023-11-17 16:09:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:34,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:34,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:34,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838274531] [2023-11-17 16:09:34,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838274531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:34,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858266098] [2023-11-17 16:09:34,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:09:34,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:34,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:34,741 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:34,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 16:09:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:34,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 16:09:34,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:09:35,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:35,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:35,222 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 52 treesize of output 89 [2023-11-17 16:09:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:35,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858266098] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:35,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:35,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 29 [2023-11-17 16:09:35,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665278448] [2023-11-17 16:09:35,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:35,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 16:09:35,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 16:09:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-11-17 16:09:35,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 231 [2023-11-17 16:09:35,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 392 transitions, 6429 flow. Second operand has 31 states, 31 states have (on average 67.64516129032258) internal successors, (2097), 31 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:35,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:35,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 231 [2023-11-17 16:09:35,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:36,386 INFO L124 PetriNetUnfolderBase]: 1089/1890 cut-off events. [2023-11-17 16:09:36,386 INFO L125 PetriNetUnfolderBase]: For 63201/63201 co-relation queries the response was YES. [2023-11-17 16:09:36,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18043 conditions, 1890 events. 1089/1890 cut-off events. For 63201/63201 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9912 event pairs, 201 based on Foata normal form. 2/1892 useless extension candidates. Maximal degree in co-relation 17930. Up to 1648 conditions per place. [2023-11-17 16:09:36,407 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 349 selfloop transitions, 108 changer transitions 2/459 dead transitions. [2023-11-17 16:09:36,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 459 transitions, 8770 flow [2023-11-17 16:09:36,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:09:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:09:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1836 transitions. [2023-11-17 16:09:36,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30569430569430567 [2023-11-17 16:09:36,410 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1836 transitions. [2023-11-17 16:09:36,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1836 transitions. [2023-11-17 16:09:36,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:36,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1836 transitions. [2023-11-17 16:09:36,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 70.61538461538461) internal successors, (1836), 26 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:36,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 231.0) internal successors, (6237), 27 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:36,417 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 231.0) internal successors, (6237), 27 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:36,417 INFO L175 Difference]: Start difference. First operand has 319 places, 392 transitions, 6429 flow. Second operand 26 states and 1836 transitions. [2023-11-17 16:09:36,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 459 transitions, 8770 flow [2023-11-17 16:09:36,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 459 transitions, 7739 flow, removed 433 selfloop flow, removed 27 redundant places. [2023-11-17 16:09:36,554 INFO L231 Difference]: Finished difference. Result has 322 places, 417 transitions, 6897 flow [2023-11-17 16:09:36,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=5578, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6897, PETRI_PLACES=322, PETRI_TRANSITIONS=417} [2023-11-17 16:09:36,555 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 301 predicate places. [2023-11-17 16:09:36,555 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 417 transitions, 6897 flow [2023-11-17 16:09:36,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 67.64516129032258) internal successors, (2097), 31 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:36,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:36,555 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:36,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-17 16:09:36,759 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,SelfDestructingSolverStorable41 [2023-11-17 16:09:36,760 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:36,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:36,760 INFO L85 PathProgramCache]: Analyzing trace with hash -449999050, now seen corresponding path program 38 times [2023-11-17 16:09:36,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:36,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590104664] [2023-11-17 16:09:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:36,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:37,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:37,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590104664] [2023-11-17 16:09:37,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590104664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:37,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710747077] [2023-11-17 16:09:37,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:09:37,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:37,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:37,417 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:37,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 16:09:37,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:09:37,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:37,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:09:37,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:37,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:37,919 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 15 treesize of output 14 [2023-11-17 16:09:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:37,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:38,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:38,198 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 52 treesize of output 105 [2023-11-17 16:09:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:38,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710747077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:38,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:38,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-11-17 16:09:38,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597937404] [2023-11-17 16:09:38,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 16:09:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 16:09:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 16:09:38,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:09:38,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 417 transitions, 6897 flow. Second operand has 42 states, 42 states have (on average 60.38095238095238) internal successors, (2536), 42 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:38,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:38,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:09:38,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:40,758 INFO L124 PetriNetUnfolderBase]: 1261/2180 cut-off events. [2023-11-17 16:09:40,758 INFO L125 PetriNetUnfolderBase]: For 92693/92693 co-relation queries the response was YES. [2023-11-17 16:09:40,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21653 conditions, 2180 events. 1261/2180 cut-off events. For 92693/92693 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11835 event pairs, 187 based on Foata normal form. 2/2182 useless extension candidates. Maximal degree in co-relation 21537. Up to 1678 conditions per place. [2023-11-17 16:09:40,778 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 315 selfloop transitions, 240 changer transitions 4/559 dead transitions. [2023-11-17 16:09:40,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 559 transitions, 10349 flow [2023-11-17 16:09:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-17 16:09:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-17 16:09:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2656 transitions. [2023-11-17 16:09:40,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2737579880437023 [2023-11-17 16:09:40,781 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2656 transitions. [2023-11-17 16:09:40,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2656 transitions. [2023-11-17 16:09:40,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:40,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2656 transitions. [2023-11-17 16:09:40,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 63.23809523809524) internal successors, (2656), 42 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:40,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 231.0) internal successors, (9933), 43 states have internal predecessors, (9933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:40,789 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 231.0) internal successors, (9933), 43 states have internal predecessors, (9933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:40,789 INFO L175 Difference]: Start difference. First operand has 322 places, 417 transitions, 6897 flow. Second operand 42 states and 2656 transitions. [2023-11-17 16:09:40,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 559 transitions, 10349 flow [2023-11-17 16:09:40,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 559 transitions, 9400 flow, removed 422 selfloop flow, removed 14 redundant places. [2023-11-17 16:09:40,955 INFO L231 Difference]: Finished difference. Result has 355 places, 494 transitions, 8442 flow [2023-11-17 16:09:40,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=5950, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=8442, PETRI_PLACES=355, PETRI_TRANSITIONS=494} [2023-11-17 16:09:40,957 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 334 predicate places. [2023-11-17 16:09:40,957 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 494 transitions, 8442 flow [2023-11-17 16:09:40,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 60.38095238095238) internal successors, (2536), 42 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:40,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:40,957 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:40,964 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 16:09:41,162 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,SelfDestructingSolverStorable42 [2023-11-17 16:09:41,163 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:41,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:41,163 INFO L85 PathProgramCache]: Analyzing trace with hash 112184152, now seen corresponding path program 39 times [2023-11-17 16:09:41,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:41,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809122382] [2023-11-17 16:09:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:41,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:41,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:41,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809122382] [2023-11-17 16:09:41,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809122382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:41,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100926355] [2023-11-17 16:09:41,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:09:41,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:41,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:41,855 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:41,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 16:09:41,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:09:41,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:41,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:09:41,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:42,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:42,319 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 17 treesize of output 14 [2023-11-17 16:09:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:42,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:49,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:49,249 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 54 treesize of output 125 [2023-11-17 16:09:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:50,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100926355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:50,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:50,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-11-17 16:09:50,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309198361] [2023-11-17 16:09:50,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:50,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-17 16:09:50,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:50,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-17 16:09:50,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1722, Unknown=2, NotChecked=0, Total=1980 [2023-11-17 16:09:50,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:09:50,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 494 transitions, 8442 flow. Second operand has 45 states, 45 states have (on average 60.355555555555554) internal successors, (2716), 45 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:50,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:50,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:09:50,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:53,593 INFO L124 PetriNetUnfolderBase]: 1341/2332 cut-off events. [2023-11-17 16:09:53,593 INFO L125 PetriNetUnfolderBase]: For 105985/105985 co-relation queries the response was YES. [2023-11-17 16:09:53,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23367 conditions, 2332 events. 1341/2332 cut-off events. For 105985/105985 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13072 event pairs, 182 based on Foata normal form. 2/2332 useless extension candidates. Maximal degree in co-relation 23244. Up to 1811 conditions per place. [2023-11-17 16:09:53,614 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 353 selfloop transitions, 243 changer transitions 10/606 dead transitions. [2023-11-17 16:09:53,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 606 transitions, 11464 flow [2023-11-17 16:09:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 16:09:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 16:09:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2833 transitions. [2023-11-17 16:09:53,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2725348725348725 [2023-11-17 16:09:53,618 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2833 transitions. [2023-11-17 16:09:53,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2833 transitions. [2023-11-17 16:09:53,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:53,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2833 transitions. [2023-11-17 16:09:53,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.955555555555556) internal successors, (2833), 45 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:53,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 231.0) internal successors, (10626), 46 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:53,631 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 231.0) internal successors, (10626), 46 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:53,631 INFO L175 Difference]: Start difference. First operand has 355 places, 494 transitions, 8442 flow. Second operand 45 states and 2833 transitions. [2023-11-17 16:09:53,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 606 transitions, 11464 flow [2023-11-17 16:09:53,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 606 transitions, 10087 flow, removed 640 selfloop flow, removed 17 redundant places. [2023-11-17 16:09:53,843 INFO L231 Difference]: Finished difference. Result has 391 places, 537 transitions, 9261 flow [2023-11-17 16:09:53,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=7229, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=9261, PETRI_PLACES=391, PETRI_TRANSITIONS=537} [2023-11-17 16:09:53,844 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 370 predicate places. [2023-11-17 16:09:53,844 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 537 transitions, 9261 flow [2023-11-17 16:09:53,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 60.355555555555554) internal successors, (2716), 45 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:53,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:53,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:53,850 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 16:09:54,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:54,048 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 16:09:54,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash 943167792, now seen corresponding path program 40 times [2023-11-17 16:09:54,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:54,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966774351] [2023-11-17 16:09:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:54,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966774351] [2023-11-17 16:09:54,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966774351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:54,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220299369] [2023-11-17 16:09:54,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:09:54,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:54,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:54,570 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:54,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 16:09:54,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:09:54,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:54,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:09:54,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:54,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:54,992 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 15 treesize of output 14 [2023-11-17 16:09:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:55,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:55,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:55,258 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 55 treesize of output 111 [2023-11-17 16:09:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:55,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220299369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:55,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:55,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 16:09:55,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836352995] [2023-11-17 16:09:55,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:55,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 16:09:55,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 16:09:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 16:09:55,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 231 [2023-11-17 16:09:55,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 537 transitions, 9261 flow. Second operand has 42 states, 42 states have (on average 68.45238095238095) internal successors, (2875), 42 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:55,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:55,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 231 [2023-11-17 16:09:55,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:57,558 INFO L124 PetriNetUnfolderBase]: 1484/2585 cut-off events. [2023-11-17 16:09:57,558 INFO L125 PetriNetUnfolderBase]: For 120891/120891 co-relation queries the response was YES. [2023-11-17 16:09:57,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27195 conditions, 2585 events. 1484/2585 cut-off events. For 120891/120891 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14884 event pairs, 195 based on Foata normal form. 2/2585 useless extension candidates. Maximal degree in co-relation 27069. Up to 2052 conditions per place. [2023-11-17 16:09:57,648 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 453 selfloop transitions, 205 changer transitions 7/665 dead transitions. [2023-11-17 16:09:57,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 665 transitions, 13316 flow [2023-11-17 16:09:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:09:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:09:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2864 transitions. [2023-11-17 16:09:57,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30995670995670993 [2023-11-17 16:09:57,651 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2864 transitions. [2023-11-17 16:09:57,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2864 transitions. [2023-11-17 16:09:57,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:57,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2864 transitions. [2023-11-17 16:09:57,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 71.6) internal successors, (2864), 40 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:57,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 231.0) internal successors, (9471), 41 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:57,661 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 231.0) internal successors, (9471), 41 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:57,662 INFO L175 Difference]: Start difference. First operand has 391 places, 537 transitions, 9261 flow. Second operand 40 states and 2864 transitions. [2023-11-17 16:09:57,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 665 transitions, 13316 flow [2023-11-17 16:09:57,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 665 transitions, 11410 flow, removed 863 selfloop flow, removed 28 redundant places. [2023-11-17 16:09:57,963 INFO L231 Difference]: Finished difference. Result has 408 places, 574 transitions, 9906 flow [2023-11-17 16:09:57,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=7915, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=9906, PETRI_PLACES=408, PETRI_TRANSITIONS=574} [2023-11-17 16:09:57,963 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 387 predicate places. [2023-11-17 16:09:57,963 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 574 transitions, 9906 flow [2023-11-17 16:09:57,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 68.45238095238095) internal successors, (2875), 42 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:57,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:57,964 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:57,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-17 16:09:58,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:58,165 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 16:09:58,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1561202754, now seen corresponding path program 41 times [2023-11-17 16:09:58,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:58,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451287869] [2023-11-17 16:09:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:58,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:58,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:58,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451287869] [2023-11-17 16:09:58,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451287869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:58,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016434785] [2023-11-17 16:09:58,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:09:58,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:58,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:58,628 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 16:09:58,631 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 16:09:58,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:09:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:58,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-17 16:09:58,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:58,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:59,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:59,110 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 52 treesize of output 89 [2023-11-17 16:09:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:59,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016434785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:59,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:59,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 28 [2023-11-17 16:09:59,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106273309] [2023-11-17 16:09:59,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:59,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:09:59,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:09:59,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:09:59,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 231 [2023-11-17 16:09:59,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 574 transitions, 9906 flow. Second operand has 30 states, 30 states have (on average 67.66666666666667) internal successors, (2030), 30 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:59,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:59,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 231 [2023-11-17 16:09:59,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:00,558 INFO L124 PetriNetUnfolderBase]: 1571/2720 cut-off events. [2023-11-17 16:10:00,559 INFO L125 PetriNetUnfolderBase]: For 135767/135767 co-relation queries the response was YES. [2023-11-17 16:10:00,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28936 conditions, 2720 events. 1571/2720 cut-off events. For 135767/135767 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15632 event pairs, 259 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 28803. Up to 2497 conditions per place. [2023-11-17 16:10:00,592 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 536 selfloop transitions, 109 changer transitions 2/647 dead transitions. [2023-11-17 16:10:00,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 647 transitions, 13482 flow [2023-11-17 16:10:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:10:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:10:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1830 transitions. [2023-11-17 16:10:00,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3046953046953047 [2023-11-17 16:10:00,594 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1830 transitions. [2023-11-17 16:10:00,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1830 transitions. [2023-11-17 16:10:00,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:00,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1830 transitions. [2023-11-17 16:10:00,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 70.38461538461539) internal successors, (1830), 26 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:00,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 231.0) internal successors, (6237), 27 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:00,600 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 231.0) internal successors, (6237), 27 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:00,600 INFO L175 Difference]: Start difference. First operand has 408 places, 574 transitions, 9906 flow. Second operand 26 states and 1830 transitions. [2023-11-17 16:10:00,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 647 transitions, 13482 flow [2023-11-17 16:10:00,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 647 transitions, 12352 flow, removed 522 selfloop flow, removed 19 redundant places. [2023-11-17 16:10:00,947 INFO L231 Difference]: Finished difference. Result has 422 places, 612 transitions, 11103 flow [2023-11-17 16:10:00,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=8776, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11103, PETRI_PLACES=422, PETRI_TRANSITIONS=612} [2023-11-17 16:10:00,948 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 401 predicate places. [2023-11-17 16:10:00,949 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 612 transitions, 11103 flow [2023-11-17 16:10:00,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 67.66666666666667) internal successors, (2030), 30 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:00,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:00,949 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:00,956 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 16:10:01,156 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,SelfDestructingSolverStorable45 [2023-11-17 16:10:01,156 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 16:10:01,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:01,156 INFO L85 PathProgramCache]: Analyzing trace with hash 989747948, now seen corresponding path program 42 times [2023-11-17 16:10:01,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:01,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905204347] [2023-11-17 16:10:01,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:01,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:01,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:01,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905204347] [2023-11-17 16:10:01,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905204347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:01,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850689841] [2023-11-17 16:10:01,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:10:01,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:01,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:01,601 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 16:10:01,602 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 16:10:01,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:10:01,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:01,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-17 16:10:01,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:01,849 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 16:10:01,882 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 16:10:01,910 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 16:10:02,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:02,141 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 15 treesize of output 14 [2023-11-17 16:10:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:02,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:02,410 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1295) c_~A~0.base))) (= (select .cse0 (+ c_~A~0.offset 8)) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* c_~N~0 4) (- 4))))))) is different from false [2023-11-17 16:10:02,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:02,464 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 56 treesize of output 45 [2023-11-17 16:10:02,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:02,481 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 98 treesize of output 91 [2023-11-17 16:10:02,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:02,489 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 83 treesize of output 69 [2023-11-17 16:10:02,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:02,497 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 35 treesize of output 33 [2023-11-17 16:10:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:02,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850689841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:02,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:02,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 41 [2023-11-17 16:10:02,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248813164] [2023-11-17 16:10:02,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:02,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 16:10:02,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 16:10:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1538, Unknown=1, NotChecked=80, Total=1806 [2023-11-17 16:10:02,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:10:02,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 612 transitions, 11103 flow. Second operand has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:02,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:02,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:10:02,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:04,553 INFO L124 PetriNetUnfolderBase]: 1772/3038 cut-off events. [2023-11-17 16:10:04,554 INFO L125 PetriNetUnfolderBase]: For 183507/183507 co-relation queries the response was YES. [2023-11-17 16:10:04,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35206 conditions, 3038 events. 1772/3038 cut-off events. For 183507/183507 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17702 event pairs, 259 based on Foata normal form. 2/3038 useless extension candidates. Maximal degree in co-relation 35064. Up to 2482 conditions per place. [2023-11-17 16:10:04,605 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 532 selfloop transitions, 211 changer transitions 9/752 dead transitions. [2023-11-17 16:10:04,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 752 transitions, 17529 flow [2023-11-17 16:10:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:10:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:10:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2099 transitions. [2023-11-17 16:10:04,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27535091171454806 [2023-11-17 16:10:04,608 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2099 transitions. [2023-11-17 16:10:04,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2099 transitions. [2023-11-17 16:10:04,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:04,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2099 transitions. [2023-11-17 16:10:04,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 63.60606060606061) internal successors, (2099), 33 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:04,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 231.0) internal successors, (7854), 34 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:04,616 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 231.0) internal successors, (7854), 34 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:04,616 INFO L175 Difference]: Start difference. First operand has 422 places, 612 transitions, 11103 flow. Second operand 33 states and 2099 transitions. [2023-11-17 16:10:04,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 752 transitions, 17529 flow [2023-11-17 16:10:05,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 752 transitions, 14662 flow, removed 1384 selfloop flow, removed 13 redundant places. [2023-11-17 16:10:05,050 INFO L231 Difference]: Finished difference. Result has 452 places, 690 transitions, 13064 flow [2023-11-17 16:10:05,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=9320, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=13064, PETRI_PLACES=452, PETRI_TRANSITIONS=690} [2023-11-17 16:10:05,051 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2023-11-17 16:10:05,051 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 690 transitions, 13064 flow [2023-11-17 16:10:05,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:05,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:05,051 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:05,058 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 16:10:05,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-17 16:10:05,257 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 16:10:05,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash -138706926, now seen corresponding path program 43 times [2023-11-17 16:10:05,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:05,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096349437] [2023-11-17 16:10:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:05,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:05,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096349437] [2023-11-17 16:10:05,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096349437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208336895] [2023-11-17 16:10:05,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:10:05,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:05,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:05,699 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 16:10:05,720 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 16:10:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:05,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 16:10:05,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:10:05,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:06,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:06,107 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 52 treesize of output 89 [2023-11-17 16:10:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:10:06,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208336895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:06,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:06,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 24 [2023-11-17 16:10:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558157382] [2023-11-17 16:10:06,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:06,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:10:06,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:10:06,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:10:06,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 231 [2023-11-17 16:10:06,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 690 transitions, 13064 flow. Second operand has 26 states, 26 states have (on average 75.73076923076923) internal successors, (1969), 26 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:06,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:06,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 231 [2023-11-17 16:10:06,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:07,682 INFO L124 PetriNetUnfolderBase]: 1867/3209 cut-off events. [2023-11-17 16:10:07,682 INFO L125 PetriNetUnfolderBase]: For 234984/234984 co-relation queries the response was YES. [2023-11-17 16:10:07,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37957 conditions, 3209 events. 1867/3209 cut-off events. For 234984/234984 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 18953 event pairs, 291 based on Foata normal form. 2/3205 useless extension candidates. Maximal degree in co-relation 37803. Up to 2734 conditions per place. [2023-11-17 16:10:07,718 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 559 selfloop transitions, 210 changer transitions 6/775 dead transitions. [2023-11-17 16:10:07,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 775 transitions, 17392 flow [2023-11-17 16:10:07,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:10:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:10:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1969 transitions. [2023-11-17 16:10:07,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34095238095238095 [2023-11-17 16:10:07,720 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1969 transitions. [2023-11-17 16:10:07,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1969 transitions. [2023-11-17 16:10:07,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:07,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1969 transitions. [2023-11-17 16:10:07,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 78.76) internal successors, (1969), 25 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:07,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 231.0) internal successors, (6006), 26 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:07,726 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 231.0) internal successors, (6006), 26 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:07,726 INFO L175 Difference]: Start difference. First operand has 452 places, 690 transitions, 13064 flow. Second operand 25 states and 1969 transitions. [2023-11-17 16:10:07,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 775 transitions, 17392 flow [2023-11-17 16:10:08,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 775 transitions, 15326 flow, removed 999 selfloop flow, removed 16 redundant places. [2023-11-17 16:10:08,333 INFO L231 Difference]: Finished difference. Result has 464 places, 735 transitions, 14051 flow [2023-11-17 16:10:08,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=11176, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=14051, PETRI_PLACES=464, PETRI_TRANSITIONS=735} [2023-11-17 16:10:08,334 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 443 predicate places. [2023-11-17 16:10:08,334 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 735 transitions, 14051 flow [2023-11-17 16:10:08,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 75.73076923076923) internal successors, (1969), 26 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:08,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:08,335 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:08,341 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 16:10:08,540 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,SelfDestructingSolverStorable47 [2023-11-17 16:10:08,541 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 16:10:08,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:08,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2066402278, now seen corresponding path program 44 times [2023-11-17 16:10:08,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:08,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535008858] [2023-11-17 16:10:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:08,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:09,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:09,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535008858] [2023-11-17 16:10:09,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535008858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:09,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747578344] [2023-11-17 16:10:09,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:10:09,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:09,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:09,205 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 16:10:09,208 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 16:10:09,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:10:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:09,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-17 16:10:09,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:09,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:10:09,355 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 16:10:09,484 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 16:10:09,530 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 16:10:09,562 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 16:10:09,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:10:09,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:09,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 16:10:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:09,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:10,139 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1364 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1364) c_~A~0.base))) (= (+ (select .cse0 (+ c_~A~0.offset 8)) c_~counter~0 (select .cse0 (+ c_~A~0.offset 4))) (let ((.cse1 (* c_~N~0 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 (- 4))) (select .cse0 (+ c_~A~0.offset .cse1 (- 8)))))))) is different from false [2023-11-17 16:10:10,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:10,198 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 75 [2023-11-17 16:10:10,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:10,220 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 158 treesize of output 160 [2023-11-17 16:10:10,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:10,241 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 128 treesize of output 116 [2023-11-17 16:10:10,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:10,264 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 52 treesize of output 63 [2023-11-17 16:10:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:10,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747578344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:10,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:10,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-11-17 16:10:10,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878087404] [2023-11-17 16:10:10,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:10,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-17 16:10:10,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:10,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-17 16:10:10,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1712, Unknown=1, NotChecked=84, Total=1980 [2023-11-17 16:10:10,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:10:10,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 735 transitions, 14051 flow. Second operand has 45 states, 45 states have (on average 60.44444444444444) internal successors, (2720), 45 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:10,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:10,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:10:10,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:13,232 INFO L124 PetriNetUnfolderBase]: 1892/3258 cut-off events. [2023-11-17 16:10:13,232 INFO L125 PetriNetUnfolderBase]: For 211971/211971 co-relation queries the response was YES. [2023-11-17 16:10:13,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36959 conditions, 3258 events. 1892/3258 cut-off events. For 211971/211971 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19429 event pairs, 251 based on Foata normal form. 2/3254 useless extension candidates. Maximal degree in co-relation 36801. Up to 2910 conditions per place. [2023-11-17 16:10:13,274 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 655 selfloop transitions, 172 changer transitions 6/833 dead transitions. [2023-11-17 16:10:13,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 833 transitions, 17216 flow [2023-11-17 16:10:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 16:10:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 16:10:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2963 transitions. [2023-11-17 16:10:13,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2729114856774431 [2023-11-17 16:10:13,277 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2963 transitions. [2023-11-17 16:10:13,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2963 transitions. [2023-11-17 16:10:13,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:13,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2963 transitions. [2023-11-17 16:10:13,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 63.04255319148936) internal successors, (2963), 47 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:13,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 231.0) internal successors, (11088), 48 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:13,286 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 231.0) internal successors, (11088), 48 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:13,286 INFO L175 Difference]: Start difference. First operand has 464 places, 735 transitions, 14051 flow. Second operand 47 states and 2963 transitions. [2023-11-17 16:10:13,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 833 transitions, 17216 flow [2023-11-17 16:10:14,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 833 transitions, 14999 flow, removed 995 selfloop flow, removed 16 redundant places. [2023-11-17 16:10:14,110 INFO L231 Difference]: Finished difference. Result has 498 places, 752 transitions, 13219 flow [2023-11-17 16:10:14,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=11870, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=13219, PETRI_PLACES=498, PETRI_TRANSITIONS=752} [2023-11-17 16:10:14,111 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 477 predicate places. [2023-11-17 16:10:14,111 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 752 transitions, 13219 flow [2023-11-17 16:10:14,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 60.44444444444444) internal successors, (2720), 45 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:14,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:14,111 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:14,116 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 16:10:14,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:14,312 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 16:10:14,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:14,312 INFO L85 PathProgramCache]: Analyzing trace with hash -96912254, now seen corresponding path program 45 times [2023-11-17 16:10:14,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:14,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469750631] [2023-11-17 16:10:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:14,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:14,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:14,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469750631] [2023-11-17 16:10:14,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469750631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:14,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16551938] [2023-11-17 16:10:14,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:10:14,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:14,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:14,965 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 16:10:14,990 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 16:10:15,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:10:15,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:15,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-17 16:10:15,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:15,341 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 16:10:15,381 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 16:10:15,419 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 16:10:15,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:10:15,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:15,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 16:10:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:15,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:16,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:16,212 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 56 treesize of output 45 [2023-11-17 16:10:16,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:16,220 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 206 treesize of output 184 [2023-11-17 16:10:16,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:16,227 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 36 treesize of output 34 [2023-11-17 16:10:16,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:16,260 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 42 treesize of output 28 [2023-11-17 16:10:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:16,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16551938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:16,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:16,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-11-17 16:10:16,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846149034] [2023-11-17 16:10:16,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:16,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-17 16:10:16,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:16,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-17 16:10:16,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1935, Unknown=10, NotChecked=0, Total=2162 [2023-11-17 16:10:16,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:10:16,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 752 transitions, 13219 flow. Second operand has 47 states, 47 states have (on average 60.38297872340426) internal successors, (2838), 47 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:16,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:16,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:10:16,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:19,442 INFO L124 PetriNetUnfolderBase]: 1936/3344 cut-off events. [2023-11-17 16:10:19,442 INFO L125 PetriNetUnfolderBase]: For 157481/157481 co-relation queries the response was YES. [2023-11-17 16:10:19,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34373 conditions, 3344 events. 1936/3344 cut-off events. For 157481/157481 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20127 event pairs, 271 based on Foata normal form. 2/3324 useless extension candidates. Maximal degree in co-relation 34216. Up to 2939 conditions per place. [2023-11-17 16:10:19,482 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 636 selfloop transitions, 213 changer transitions 7/856 dead transitions. [2023-11-17 16:10:19,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 856 transitions, 16405 flow [2023-11-17 16:10:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-17 16:10:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-17 16:10:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3270 transitions. [2023-11-17 16:10:19,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2722277722277722 [2023-11-17 16:10:19,487 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3270 transitions. [2023-11-17 16:10:19,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3270 transitions. [2023-11-17 16:10:19,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:19,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3270 transitions. [2023-11-17 16:10:19,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 62.88461538461539) internal successors, (3270), 52 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:19,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 231.0) internal successors, (12243), 53 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:19,500 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 231.0) internal successors, (12243), 53 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:19,500 INFO L175 Difference]: Start difference. First operand has 498 places, 752 transitions, 13219 flow. Second operand 52 states and 3270 transitions. [2023-11-17 16:10:19,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 856 transitions, 16405 flow [2023-11-17 16:10:20,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 856 transitions, 15471 flow, removed 371 selfloop flow, removed 35 redundant places. [2023-11-17 16:10:20,029 INFO L231 Difference]: Finished difference. Result has 522 places, 774 transitions, 13911 flow [2023-11-17 16:10:20,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=12379, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=13911, PETRI_PLACES=522, PETRI_TRANSITIONS=774} [2023-11-17 16:10:20,030 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 501 predicate places. [2023-11-17 16:10:20,030 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 774 transitions, 13911 flow [2023-11-17 16:10:20,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 60.38297872340426) internal successors, (2838), 47 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:20,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:20,030 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:20,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-17 16:10:20,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-17 16:10:20,231 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 16:10:20,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1478656956, now seen corresponding path program 46 times [2023-11-17 16:10:20,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:20,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574068610] [2023-11-17 16:10:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:20,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:20,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:20,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574068610] [2023-11-17 16:10:20,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574068610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:20,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235172591] [2023-11-17 16:10:20,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:10:20,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:20,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:20,821 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 16:10:20,823 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 16:10:20,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:10:20,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:20,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-17 16:10:20,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:21,066 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 16:10:21,112 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 16:10:21,153 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 16:10:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:10:21,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:21,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 16:10:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:21,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:21,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:21,884 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 75 [2023-11-17 16:10:21,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:21,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 298 [2023-11-17 16:10:21,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:21,934 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 53 treesize of output 64 [2023-11-17 16:10:22,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:22,128 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 70 treesize of output 58 [2023-11-17 16:10:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:22,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235172591] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:22,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:22,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-11-17 16:10:22,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491312065] [2023-11-17 16:10:22,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:22,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-17 16:10:22,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-17 16:10:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1776, Unknown=10, NotChecked=0, Total=1980 [2023-11-17 16:10:22,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:10:22,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 774 transitions, 13911 flow. Second operand has 45 states, 45 states have (on average 60.44444444444444) internal successors, (2720), 45 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:22,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:22,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:10:22,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:25,230 INFO L124 PetriNetUnfolderBase]: 2029/3518 cut-off events. [2023-11-17 16:10:25,230 INFO L125 PetriNetUnfolderBase]: For 188918/188918 co-relation queries the response was YES. [2023-11-17 16:10:25,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37198 conditions, 3518 events. 2029/3518 cut-off events. For 188918/188918 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 21484 event pairs, 281 based on Foata normal form. 2/3498 useless extension candidates. Maximal degree in co-relation 37032. Up to 3111 conditions per place. [2023-11-17 16:10:25,269 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 676 selfloop transitions, 191 changer transitions 6/873 dead transitions. [2023-11-17 16:10:25,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 873 transitions, 17180 flow [2023-11-17 16:10:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 16:10:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 16:10:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2895 transitions. [2023-11-17 16:10:25,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2724449463579898 [2023-11-17 16:10:25,271 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2895 transitions. [2023-11-17 16:10:25,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2895 transitions. [2023-11-17 16:10:25,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:25,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2895 transitions. [2023-11-17 16:10:25,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 62.93478260869565) internal successors, (2895), 46 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:25,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 231.0) internal successors, (10857), 47 states have internal predecessors, (10857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:25,278 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 231.0) internal successors, (10857), 47 states have internal predecessors, (10857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:25,278 INFO L175 Difference]: Start difference. First operand has 522 places, 774 transitions, 13911 flow. Second operand 46 states and 2895 transitions. [2023-11-17 16:10:25,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 873 transitions, 17180 flow [2023-11-17 16:10:25,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 873 transitions, 16288 flow, removed 341 selfloop flow, removed 37 redundant places. [2023-11-17 16:10:25,857 INFO L231 Difference]: Finished difference. Result has 535 places, 802 transitions, 14597 flow [2023-11-17 16:10:25,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=13019, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=14597, PETRI_PLACES=535, PETRI_TRANSITIONS=802} [2023-11-17 16:10:25,858 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 514 predicate places. [2023-11-17 16:10:25,858 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 802 transitions, 14597 flow [2023-11-17 16:10:25,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 60.44444444444444) internal successors, (2720), 45 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:25,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:25,859 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:25,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-17 16:10:26,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:26,060 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 16:10:26,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash -163516816, now seen corresponding path program 47 times [2023-11-17 16:10:26,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:26,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217169326] [2023-11-17 16:10:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:26,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:26,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217169326] [2023-11-17 16:10:26,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217169326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126252203] [2023-11-17 16:10:26,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:10:26,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:26,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:26,639 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 16:10:26,660 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 16:10:26,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:10:26,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:26,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 16:10:26,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:10:27,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:27,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:27,195 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 52 treesize of output 89 [2023-11-17 16:10:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:10:27,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126252203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:27,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:27,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-11-17 16:10:27,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184349821] [2023-11-17 16:10:27,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:27,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:10:27,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:10:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:10:27,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 231 [2023-11-17 16:10:27,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 802 transitions, 14597 flow. Second operand has 32 states, 32 states have (on average 68.6875) internal successors, (2198), 32 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:27,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:27,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 231 [2023-11-17 16:10:27,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:29,556 INFO L124 PetriNetUnfolderBase]: 2165/3737 cut-off events. [2023-11-17 16:10:29,556 INFO L125 PetriNetUnfolderBase]: For 233507/233507 co-relation queries the response was YES. [2023-11-17 16:10:29,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42118 conditions, 3737 events. 2165/3737 cut-off events. For 233507/233507 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22948 event pairs, 314 based on Foata normal form. 3/3718 useless extension candidates. Maximal degree in co-relation 41946. Up to 3131 conditions per place. [2023-11-17 16:10:29,624 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 608 selfloop transitions, 297 changer transitions 6/911 dead transitions. [2023-11-17 16:10:29,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 911 transitions, 19640 flow [2023-11-17 16:10:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 16:10:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 16:10:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2225 transitions. [2023-11-17 16:10:29,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3107107945817623 [2023-11-17 16:10:29,627 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2225 transitions. [2023-11-17 16:10:29,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2225 transitions. [2023-11-17 16:10:29,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:29,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2225 transitions. [2023-11-17 16:10:29,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 71.7741935483871) internal successors, (2225), 31 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:29,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 231.0) internal successors, (7392), 32 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:29,633 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 231.0) internal successors, (7392), 32 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:29,633 INFO L175 Difference]: Start difference. First operand has 535 places, 802 transitions, 14597 flow. Second operand 31 states and 2225 transitions. [2023-11-17 16:10:29,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 911 transitions, 19640 flow [2023-11-17 16:10:30,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 911 transitions, 18855 flow, removed 324 selfloop flow, removed 32 redundant places. [2023-11-17 16:10:30,449 INFO L231 Difference]: Finished difference. Result has 541 places, 854 transitions, 17342 flow [2023-11-17 16:10:30,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=13812, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17342, PETRI_PLACES=541, PETRI_TRANSITIONS=854} [2023-11-17 16:10:30,450 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 520 predicate places. [2023-11-17 16:10:30,450 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 854 transitions, 17342 flow [2023-11-17 16:10:30,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 68.6875) internal successors, (2198), 32 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:30,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:30,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:30,461 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 16:10:30,658 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,SelfDestructingSolverStorable51 [2023-11-17 16:10:30,658 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 16:10:30,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:30,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1802059122, now seen corresponding path program 48 times [2023-11-17 16:10:30,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:30,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245823553] [2023-11-17 16:10:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:30,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:31,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:31,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245823553] [2023-11-17 16:10:31,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245823553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:31,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855106050] [2023-11-17 16:10:31,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:10:31,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:31,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:31,341 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 16:10:31,362 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 16:10:31,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:10:31,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:31,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:10:31,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:31,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:31,889 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 15 treesize of output 14 [2023-11-17 16:10:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:31,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:32,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:32,134 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 62 treesize of output 117 [2023-11-17 16:10:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:32,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855106050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:32,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:32,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-17 16:10:32,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687377977] [2023-11-17 16:10:32,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:32,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 16:10:32,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:32,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 16:10:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 16:10:32,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:10:32,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 854 transitions, 17342 flow. Second operand has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:32,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:32,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:10:32,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:35,799 INFO L124 PetriNetUnfolderBase]: 2224/3847 cut-off events. [2023-11-17 16:10:35,799 INFO L125 PetriNetUnfolderBase]: For 258633/258633 co-relation queries the response was YES. [2023-11-17 16:10:35,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44586 conditions, 3847 events. 2224/3847 cut-off events. For 258633/258633 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23825 event pairs, 300 based on Foata normal form. 2/3827 useless extension candidates. Maximal degree in co-relation 44405. Up to 3622 conditions per place. [2023-11-17 16:10:35,852 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 828 selfloop transitions, 106 changer transitions 6/940 dead transitions. [2023-11-17 16:10:35,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 940 transitions, 20957 flow [2023-11-17 16:10:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 16:10:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 16:10:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2390 transitions. [2023-11-17 16:10:35,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2722715880610617 [2023-11-17 16:10:35,855 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2390 transitions. [2023-11-17 16:10:35,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2390 transitions. [2023-11-17 16:10:35,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:35,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2390 transitions. [2023-11-17 16:10:35,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 62.89473684210526) internal successors, (2390), 38 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:35,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 231.0) internal successors, (9009), 39 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:35,863 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 231.0) internal successors, (9009), 39 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:35,863 INFO L175 Difference]: Start difference. First operand has 541 places, 854 transitions, 17342 flow. Second operand 38 states and 2390 transitions. [2023-11-17 16:10:35,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 940 transitions, 20957 flow [2023-11-17 16:10:36,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 940 transitions, 18480 flow, removed 1151 selfloop flow, removed 18 redundant places. [2023-11-17 16:10:36,900 INFO L231 Difference]: Finished difference. Result has 569 places, 883 transitions, 16435 flow [2023-11-17 16:10:36,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=14895, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16435, PETRI_PLACES=569, PETRI_TRANSITIONS=883} [2023-11-17 16:10:36,901 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 548 predicate places. [2023-11-17 16:10:36,902 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 883 transitions, 16435 flow [2023-11-17 16:10:36,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:36,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:36,902 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:36,907 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 16:10:37,102 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,SelfDestructingSolverStorable52 [2023-11-17 16:10:37,103 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 16:10:37,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:37,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1250628722, now seen corresponding path program 49 times [2023-11-17 16:10:37,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:37,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900969178] [2023-11-17 16:10:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:37,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:37,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:37,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900969178] [2023-11-17 16:10:37,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900969178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:37,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360792063] [2023-11-17 16:10:37,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:10:37,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:37,676 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 16:10:37,678 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 16:10:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:37,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 16:10:37,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:10:38,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:38,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:38,277 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 62 treesize of output 95 [2023-11-17 16:10:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:10:38,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360792063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:38,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:38,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-11-17 16:10:38,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64923512] [2023-11-17 16:10:38,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:38,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:10:38,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:38,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:10:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:10:38,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:10:38,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 883 transitions, 16435 flow. Second operand has 35 states, 35 states have (on average 60.74285714285714) internal successors, (2126), 35 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:38,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:38,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:10:38,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:41,031 INFO L124 PetriNetUnfolderBase]: 2366/4070 cut-off events. [2023-11-17 16:10:41,032 INFO L125 PetriNetUnfolderBase]: For 260239/260239 co-relation queries the response was YES. [2023-11-17 16:10:41,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45826 conditions, 4070 events. 2366/4070 cut-off events. For 260239/260239 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25171 event pairs, 339 based on Foata normal form. 3/4037 useless extension candidates. Maximal degree in co-relation 45637. Up to 3697 conditions per place. [2023-11-17 16:10:41,081 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 795 selfloop transitions, 206 changer transitions 5/1006 dead transitions. [2023-11-17 16:10:41,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 1006 transitions, 21510 flow [2023-11-17 16:10:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:10:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:10:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2352 transitions. [2023-11-17 16:10:41,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2751842751842752 [2023-11-17 16:10:41,084 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2352 transitions. [2023-11-17 16:10:41,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2352 transitions. [2023-11-17 16:10:41,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:41,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2352 transitions. [2023-11-17 16:10:41,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 63.567567567567565) internal successors, (2352), 37 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:41,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 231.0) internal successors, (8778), 38 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:41,092 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 231.0) internal successors, (8778), 38 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:41,092 INFO L175 Difference]: Start difference. First operand has 569 places, 883 transitions, 16435 flow. Second operand 37 states and 2352 transitions. [2023-11-17 16:10:41,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 1006 transitions, 21510 flow [2023-11-17 16:10:41,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1006 transitions, 20626 flow, removed 405 selfloop flow, removed 21 redundant places. [2023-11-17 16:10:42,053 INFO L231 Difference]: Finished difference. Result has 599 places, 950 transitions, 18806 flow [2023-11-17 16:10:42,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=15551, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18806, PETRI_PLACES=599, PETRI_TRANSITIONS=950} [2023-11-17 16:10:42,054 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 578 predicate places. [2023-11-17 16:10:42,054 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 950 transitions, 18806 flow [2023-11-17 16:10:42,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 60.74285714285714) internal successors, (2126), 35 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:42,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:42,054 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:42,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-17 16:10:42,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:42,255 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 16:10:42,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:42,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1303144242, now seen corresponding path program 50 times [2023-11-17 16:10:42,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:42,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097850129] [2023-11-17 16:10:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:42,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:42,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:42,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097850129] [2023-11-17 16:10:42,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097850129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:42,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992949644] [2023-11-17 16:10:42,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:10:42,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:42,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:42,806 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 16:10:42,827 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 16:10:42,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:10:42,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:42,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:10:42,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:43,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:43,319 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 15 treesize of output 14 [2023-11-17 16:10:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:43,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:43,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:43,604 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 62 treesize of output 117 [2023-11-17 16:10:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:44,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992949644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:44,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:44,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 16:10:44,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719685512] [2023-11-17 16:10:44,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:44,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 16:10:44,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 16:10:44,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 16:10:44,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:10:44,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 950 transitions, 18806 flow. Second operand has 42 states, 42 states have (on average 60.54761904761905) internal successors, (2543), 42 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:44,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:44,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:10:44,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:47,037 INFO L124 PetriNetUnfolderBase]: 2410/4152 cut-off events. [2023-11-17 16:10:47,038 INFO L125 PetriNetUnfolderBase]: For 288449/288449 co-relation queries the response was YES. [2023-11-17 16:10:47,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48359 conditions, 4152 events. 2410/4152 cut-off events. For 288449/288449 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 25883 event pairs, 352 based on Foata normal form. 2/4120 useless extension candidates. Maximal degree in co-relation 48154. Up to 3989 conditions per place. [2023-11-17 16:10:47,093 INFO L140 encePairwiseOnDemand]: 222/231 looper letters, 939 selfloop transitions, 68 changer transitions 5/1012 dead transitions. [2023-11-17 16:10:47,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1012 transitions, 22186 flow [2023-11-17 16:10:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:10:47,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:10:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2016 transitions. [2023-11-17 16:10:47,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2727272727272727 [2023-11-17 16:10:47,095 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2016 transitions. [2023-11-17 16:10:47,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2016 transitions. [2023-11-17 16:10:47,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:47,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2016 transitions. [2023-11-17 16:10:47,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 63.0) internal successors, (2016), 32 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:47,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 231.0) internal successors, (7623), 33 states have internal predecessors, (7623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:47,100 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 231.0) internal successors, (7623), 33 states have internal predecessors, (7623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:47,100 INFO L175 Difference]: Start difference. First operand has 599 places, 950 transitions, 18806 flow. Second operand 32 states and 2016 transitions. [2023-11-17 16:10:47,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1012 transitions, 22186 flow [2023-11-17 16:10:48,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 1012 transitions, 20286 flow, removed 899 selfloop flow, removed 17 redundant places. [2023-11-17 16:10:48,100 INFO L231 Difference]: Finished difference. Result has 616 places, 960 transitions, 17880 flow [2023-11-17 16:10:48,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=16906, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=950, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17880, PETRI_PLACES=616, PETRI_TRANSITIONS=960} [2023-11-17 16:10:48,101 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 595 predicate places. [2023-11-17 16:10:48,101 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 960 transitions, 17880 flow [2023-11-17 16:10:48,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 60.54761904761905) internal successors, (2543), 42 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:48,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:48,102 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:48,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-17 16:10:48,302 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,SelfDestructingSolverStorable54 [2023-11-17 16:10:48,302 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 16:10:48,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:48,303 INFO L85 PathProgramCache]: Analyzing trace with hash -718861302, now seen corresponding path program 51 times [2023-11-17 16:10:48,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:48,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970545535] [2023-11-17 16:10:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:48,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:48,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:48,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970545535] [2023-11-17 16:10:48,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970545535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:48,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235991747] [2023-11-17 16:10:48,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:10:48,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:48,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:48,844 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 16:10:48,845 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 16:10:48,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:10:48,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:48,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-17 16:10:48,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:49,040 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 16:10:49,076 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 16:10:49,099 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 16:10:49,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:49,327 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 19 treesize of output 16 [2023-11-17 16:10:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:10:49,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:10:49,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235991747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:49,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:49,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 37 [2023-11-17 16:10:49,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041564757] [2023-11-17 16:10:49,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:49,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 16:10:49,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 16:10:49,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2023-11-17 16:10:49,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:10:49,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 960 transitions, 17880 flow. Second operand has 39 states, 39 states have (on average 60.61538461538461) internal successors, (2364), 39 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:49,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:49,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:10:49,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:52,650 INFO L124 PetriNetUnfolderBase]: 2447/4233 cut-off events. [2023-11-17 16:10:52,650 INFO L125 PetriNetUnfolderBase]: For 273005/273005 co-relation queries the response was YES. [2023-11-17 16:10:52,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47453 conditions, 4233 events. 2447/4233 cut-off events. For 273005/273005 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 26592 event pairs, 363 based on Foata normal form. 2/4203 useless extension candidates. Maximal degree in co-relation 47244. Up to 3962 conditions per place. [2023-11-17 16:10:52,821 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 884 selfloop transitions, 135 changer transitions 9/1028 dead transitions. [2023-11-17 16:10:52,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 1028 transitions, 21229 flow [2023-11-17 16:10:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:10:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:10:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2021 transitions. [2023-11-17 16:10:52,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2734036796536797 [2023-11-17 16:10:52,824 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2021 transitions. [2023-11-17 16:10:52,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2021 transitions. [2023-11-17 16:10:52,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:52,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2021 transitions. [2023-11-17 16:10:52,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 63.15625) internal successors, (2021), 32 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:52,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 231.0) internal successors, (7623), 33 states have internal predecessors, (7623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:52,828 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 231.0) internal successors, (7623), 33 states have internal predecessors, (7623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:52,829 INFO L175 Difference]: Start difference. First operand has 616 places, 960 transitions, 17880 flow. Second operand 32 states and 2021 transitions. [2023-11-17 16:10:52,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 1028 transitions, 21229 flow [2023-11-17 16:10:53,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 1028 transitions, 20628 flow, removed 253 selfloop flow, removed 25 redundant places. [2023-11-17 16:10:53,915 INFO L231 Difference]: Finished difference. Result has 627 places, 973 transitions, 18524 flow [2023-11-17 16:10:53,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=17279, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=18524, PETRI_PLACES=627, PETRI_TRANSITIONS=973} [2023-11-17 16:10:53,916 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 606 predicate places. [2023-11-17 16:10:53,916 INFO L495 AbstractCegarLoop]: Abstraction has has 627 places, 973 transitions, 18524 flow [2023-11-17 16:10:53,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 60.61538461538461) internal successors, (2364), 39 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:53,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:53,916 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:53,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-11-17 16:10:54,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-17 16:10:54,117 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 16:10:54,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:54,117 INFO L85 PathProgramCache]: Analyzing trace with hash 210392924, now seen corresponding path program 52 times [2023-11-17 16:10:54,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:54,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503635181] [2023-11-17 16:10:54,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:54,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:54,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:54,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503635181] [2023-11-17 16:10:54,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503635181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:54,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625130284] [2023-11-17 16:10:54,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:10:54,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:54,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:54,826 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 16:10:54,827 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 16:10:54,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:10:54,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:54,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:10:54,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:55,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:55,284 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 15 treesize of output 14 [2023-11-17 16:10:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:55,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:55,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:55,520 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 62 treesize of output 117 [2023-11-17 16:10:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:10:56,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625130284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:56,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:56,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-17 16:10:56,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782488385] [2023-11-17 16:10:56,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:56,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 16:10:56,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:56,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 16:10:56,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 16:10:56,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:10:56,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 973 transitions, 18524 flow. Second operand has 43 states, 43 states have (on average 60.51162790697674) internal successors, (2602), 43 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:56,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:56,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:10:56,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:59,056 INFO L124 PetriNetUnfolderBase]: 2504/4324 cut-off events. [2023-11-17 16:10:59,056 INFO L125 PetriNetUnfolderBase]: For 298206/298206 co-relation queries the response was YES. [2023-11-17 16:10:59,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49468 conditions, 4324 events. 2504/4324 cut-off events. For 298206/298206 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27230 event pairs, 376 based on Foata normal form. 2/4294 useless extension candidates. Maximal degree in co-relation 49253. Up to 4020 conditions per place. [2023-11-17 16:10:59,116 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 874 selfloop transitions, 175 changer transitions 6/1055 dead transitions. [2023-11-17 16:10:59,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 1055 transitions, 22266 flow [2023-11-17 16:10:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:10:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:10:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2334 transitions. [2023-11-17 16:10:59,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2730782730782731 [2023-11-17 16:10:59,118 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2334 transitions. [2023-11-17 16:10:59,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2334 transitions. [2023-11-17 16:10:59,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:59,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2334 transitions. [2023-11-17 16:10:59,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 63.08108108108108) internal successors, (2334), 37 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:59,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 231.0) internal successors, (8778), 38 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:59,124 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 231.0) internal successors, (8778), 38 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:59,124 INFO L175 Difference]: Start difference. First operand has 627 places, 973 transitions, 18524 flow. Second operand 37 states and 2334 transitions. [2023-11-17 16:10:59,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 1055 transitions, 22266 flow [2023-11-17 16:11:00,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 1055 transitions, 21376 flow, removed 393 selfloop flow, removed 21 redundant places. [2023-11-17 16:11:00,355 INFO L231 Difference]: Finished difference. Result has 645 places, 997 transitions, 19257 flow [2023-11-17 16:11:00,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=17634, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=805, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=19257, PETRI_PLACES=645, PETRI_TRANSITIONS=997} [2023-11-17 16:11:00,356 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 624 predicate places. [2023-11-17 16:11:00,356 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 997 transitions, 19257 flow [2023-11-17 16:11:00,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 60.51162790697674) internal successors, (2602), 43 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:00,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:00,357 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:00,364 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 16:11:00,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:00,563 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 16:11:00,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1822083528, now seen corresponding path program 53 times [2023-11-17 16:11:00,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:00,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872899758] [2023-11-17 16:11:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:00,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:01,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:01,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872899758] [2023-11-17 16:11:01,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872899758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:01,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32830072] [2023-11-17 16:11:01,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:11:01,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:01,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:01,034 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 16:11:01,035 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 16:11:01,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:11:01,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:01,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 16:11:01,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:01,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:01,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:01,527 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 62 treesize of output 95 [2023-11-17 16:11:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:01,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32830072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:01,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:01,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-11-17 16:11:01,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316845823] [2023-11-17 16:11:01,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:01,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:11:01,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:01,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:11:01,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:11:01,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 231 [2023-11-17 16:11:01,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 997 transitions, 19257 flow. Second operand has 32 states, 32 states have (on average 68.84375) internal successors, (2203), 32 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:01,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:01,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 231 [2023-11-17 16:11:01,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:04,625 INFO L124 PetriNetUnfolderBase]: 2612/4498 cut-off events. [2023-11-17 16:11:04,626 INFO L125 PetriNetUnfolderBase]: For 369192/369192 co-relation queries the response was YES. [2023-11-17 16:11:04,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54640 conditions, 4498 events. 2612/4498 cut-off events. For 369192/369192 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28409 event pairs, 386 based on Foata normal form. 3/4469 useless extension candidates. Maximal degree in co-relation 54422. Up to 4072 conditions per place. [2023-11-17 16:11:04,689 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 892 selfloop transitions, 190 changer transitions 3/1085 dead transitions. [2023-11-17 16:11:04,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 1085 transitions, 24318 flow [2023-11-17 16:11:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:11:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:11:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2301 transitions. [2023-11-17 16:11:04,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3112824675324675 [2023-11-17 16:11:04,692 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2301 transitions. [2023-11-17 16:11:04,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2301 transitions. [2023-11-17 16:11:04,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:04,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2301 transitions. [2023-11-17 16:11:04,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 71.90625) internal successors, (2301), 32 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:04,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 231.0) internal successors, (7623), 33 states have internal predecessors, (7623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:04,699 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 231.0) internal successors, (7623), 33 states have internal predecessors, (7623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:04,699 INFO L175 Difference]: Start difference. First operand has 645 places, 997 transitions, 19257 flow. Second operand 32 states and 2301 transitions. [2023-11-17 16:11:04,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 1085 transitions, 24318 flow [2023-11-17 16:11:05,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 1085 transitions, 23516 flow, removed 367 selfloop flow, removed 21 redundant places. [2023-11-17 16:11:05,974 INFO L231 Difference]: Finished difference. Result has 662 places, 1023 transitions, 20962 flow [2023-11-17 16:11:05,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=18455, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=20962, PETRI_PLACES=662, PETRI_TRANSITIONS=1023} [2023-11-17 16:11:05,975 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 641 predicate places. [2023-11-17 16:11:05,975 INFO L495 AbstractCegarLoop]: Abstraction has has 662 places, 1023 transitions, 20962 flow [2023-11-17 16:11:05,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 68.84375) internal successors, (2203), 32 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:05,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:05,975 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:05,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-17 16:11:06,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:06,176 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 16:11:06,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1386223566, now seen corresponding path program 54 times [2023-11-17 16:11:06,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:06,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964119936] [2023-11-17 16:11:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:06,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:06,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964119936] [2023-11-17 16:11:06,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964119936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785804082] [2023-11-17 16:11:06,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:11:06,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:06,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:06,695 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 16:11:06,696 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 16:11:06,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:11:06,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:06,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-17 16:11:06,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:06,944 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 16:11:07,002 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 16:11:07,024 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 16:11:07,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:07,210 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 19 treesize of output 16 [2023-11-17 16:11:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:11:07,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:11:07,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785804082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:07,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:07,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 36 [2023-11-17 16:11:07,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079061736] [2023-11-17 16:11:07,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:07,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 16:11:07,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:07,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 16:11:07,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2023-11-17 16:11:07,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:11:07,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 1023 transitions, 20962 flow. Second operand has 38 states, 38 states have (on average 60.578947368421055) internal successors, (2302), 38 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:07,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:07,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:11:07,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:10,812 INFO L124 PetriNetUnfolderBase]: 2638/4556 cut-off events. [2023-11-17 16:11:10,813 INFO L125 PetriNetUnfolderBase]: For 402391/402391 co-relation queries the response was YES. [2023-11-17 16:11:10,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56531 conditions, 4556 events. 2638/4556 cut-off events. For 402391/402391 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 28966 event pairs, 369 based on Foata normal form. 2/4526 useless extension candidates. Maximal degree in co-relation 56306. Up to 4258 conditions per place. [2023-11-17 16:11:10,877 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 945 selfloop transitions, 133 changer transitions 8/1086 dead transitions. [2023-11-17 16:11:10,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 1086 transitions, 24695 flow [2023-11-17 16:11:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:11:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:11:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2075 transitions. [2023-11-17 16:11:10,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27220254492981766 [2023-11-17 16:11:10,879 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2075 transitions. [2023-11-17 16:11:10,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2075 transitions. [2023-11-17 16:11:10,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:10,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2075 transitions. [2023-11-17 16:11:10,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 62.878787878787875) internal successors, (2075), 33 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:10,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 231.0) internal successors, (7854), 34 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:10,884 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 231.0) internal successors, (7854), 34 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:10,884 INFO L175 Difference]: Start difference. First operand has 662 places, 1023 transitions, 20962 flow. Second operand 33 states and 2075 transitions. [2023-11-17 16:11:10,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 1086 transitions, 24695 flow [2023-11-17 16:11:12,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 1086 transitions, 23266 flow, removed 650 selfloop flow, removed 21 redundant places. [2023-11-17 16:11:12,632 INFO L231 Difference]: Finished difference. Result has 680 places, 1035 transitions, 20774 flow [2023-11-17 16:11:12,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=19535, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=20774, PETRI_PLACES=680, PETRI_TRANSITIONS=1035} [2023-11-17 16:11:12,634 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 659 predicate places. [2023-11-17 16:11:12,634 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 1035 transitions, 20774 flow [2023-11-17 16:11:12,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 60.578947368421055) internal successors, (2302), 38 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:12,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:12,635 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:12,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-11-17 16:11:12,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:12,841 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 16:11:12,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1218105654, now seen corresponding path program 55 times [2023-11-17 16:11:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:12,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450449517] [2023-11-17 16:11:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:12,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:13,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:13,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450449517] [2023-11-17 16:11:13,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450449517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:13,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471577961] [2023-11-17 16:11:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:11:13,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:13,336 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 16:11:13,337 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 16:11:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:13,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 16:11:13,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:11:13,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:13,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:13,898 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 62 treesize of output 95 [2023-11-17 16:11:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:14,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471577961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:14,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:14,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-11-17 16:11:14,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652464367] [2023-11-17 16:11:14,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:14,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:11:14,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:14,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:11:14,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 16:11:14,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 231 [2023-11-17 16:11:14,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 1035 transitions, 20774 flow. Second operand has 34 states, 34 states have (on average 68.6470588235294) internal successors, (2334), 34 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:14,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:14,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 231 [2023-11-17 16:11:14,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:17,236 INFO L124 PetriNetUnfolderBase]: 2787/4820 cut-off events. [2023-11-17 16:11:17,236 INFO L125 PetriNetUnfolderBase]: For 472264/472264 co-relation queries the response was YES. [2023-11-17 16:11:17,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61792 conditions, 4820 events. 2787/4820 cut-off events. For 472264/472264 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31073 event pairs, 396 based on Foata normal form. 3/4791 useless extension candidates. Maximal degree in co-relation 61560. Up to 4219 conditions per place. [2023-11-17 16:11:17,308 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 881 selfloop transitions, 265 changer transitions 8/1154 dead transitions. [2023-11-17 16:11:17,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 712 places, 1154 transitions, 27789 flow [2023-11-17 16:11:17,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 16:11:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 16:11:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2433 transitions. [2023-11-17 16:11:17,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3097784568372804 [2023-11-17 16:11:17,311 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2433 transitions. [2023-11-17 16:11:17,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2433 transitions. [2023-11-17 16:11:17,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:17,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2433 transitions. [2023-11-17 16:11:17,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 71.55882352941177) internal successors, (2433), 34 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:17,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 231.0) internal successors, (8085), 35 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:17,316 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 231.0) internal successors, (8085), 35 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:17,316 INFO L175 Difference]: Start difference. First operand has 680 places, 1035 transitions, 20774 flow. Second operand 34 states and 2433 transitions. [2023-11-17 16:11:17,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 712 places, 1154 transitions, 27789 flow [2023-11-17 16:11:19,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 1154 transitions, 26841 flow, removed 403 selfloop flow, removed 25 redundant places. [2023-11-17 16:11:19,393 INFO L231 Difference]: Finished difference. Result has 698 places, 1093 transitions, 24374 flow [2023-11-17 16:11:19,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=19962, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=24374, PETRI_PLACES=698, PETRI_TRANSITIONS=1093} [2023-11-17 16:11:19,394 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 677 predicate places. [2023-11-17 16:11:19,394 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 1093 transitions, 24374 flow [2023-11-17 16:11:19,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 68.6470588235294) internal successors, (2334), 34 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:19,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:19,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:19,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-17 16:11:19,594 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,SelfDestructingSolverStorable59 [2023-11-17 16:11:19,595 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 16:11:19,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:19,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1438739086, now seen corresponding path program 56 times [2023-11-17 16:11:19,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:19,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581573831] [2023-11-17 16:11:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:19,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:20,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:20,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581573831] [2023-11-17 16:11:20,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581573831] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:20,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000632959] [2023-11-17 16:11:20,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:11:20,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:20,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:20,125 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 16:11:20,127 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 16:11:20,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:11:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:20,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:11:20,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:20,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:20,592 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 15 treesize of output 14 [2023-11-17 16:11:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:20,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:20,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:20,828 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 62 treesize of output 117 [2023-11-17 16:11:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:21,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000632959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:21,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:21,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-17 16:11:21,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327212228] [2023-11-17 16:11:21,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:21,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 16:11:21,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 16:11:21,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 16:11:21,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:11:21,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 1093 transitions, 24374 flow. Second operand has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:21,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:21,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:11:21,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:25,574 INFO L124 PetriNetUnfolderBase]: 2896/5025 cut-off events. [2023-11-17 16:11:25,574 INFO L125 PetriNetUnfolderBase]: For 539161/539161 co-relation queries the response was YES. [2023-11-17 16:11:25,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66084 conditions, 5025 events. 2896/5025 cut-off events. For 539161/539161 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32923 event pairs, 397 based on Foata normal form. 2/4995 useless extension candidates. Maximal degree in co-relation 65842. Up to 4594 conditions per place. [2023-11-17 16:11:25,655 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 1017 selfloop transitions, 181 changer transitions 7/1205 dead transitions. [2023-11-17 16:11:25,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 1205 transitions, 29098 flow [2023-11-17 16:11:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 16:11:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 16:11:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2580 transitions. [2023-11-17 16:11:25,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2724105163129553 [2023-11-17 16:11:25,658 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2580 transitions. [2023-11-17 16:11:25,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2580 transitions. [2023-11-17 16:11:25,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:25,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2580 transitions. [2023-11-17 16:11:25,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 62.926829268292686) internal successors, (2580), 41 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:25,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 231.0) internal successors, (9702), 42 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:25,665 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 231.0) internal successors, (9702), 42 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:25,665 INFO L175 Difference]: Start difference. First operand has 698 places, 1093 transitions, 24374 flow. Second operand 41 states and 2580 transitions. [2023-11-17 16:11:25,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 1205 transitions, 29098 flow [2023-11-17 16:11:27,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 1205 transitions, 26007 flow, removed 1467 selfloop flow, removed 21 redundant places. [2023-11-17 16:11:27,743 INFO L231 Difference]: Finished difference. Result has 724 places, 1139 transitions, 23606 flow [2023-11-17 16:11:27,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=21305, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=23606, PETRI_PLACES=724, PETRI_TRANSITIONS=1139} [2023-11-17 16:11:27,744 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 703 predicate places. [2023-11-17 16:11:27,744 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 1139 transitions, 23606 flow [2023-11-17 16:11:27,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:27,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:27,745 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:27,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-11-17 16:11:27,945 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,SelfDestructingSolverStorable60 [2023-11-17 16:11:27,945 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 16:11:27,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:27,946 INFO L85 PathProgramCache]: Analyzing trace with hash -228631038, now seen corresponding path program 57 times [2023-11-17 16:11:27,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:27,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300167656] [2023-11-17 16:11:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:27,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:28,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:28,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300167656] [2023-11-17 16:11:28,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300167656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209067706] [2023-11-17 16:11:28,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:11:28,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:28,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:28,416 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 16:11:28,418 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 16:11:28,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:11:28,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:28,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-17 16:11:28,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:28,707 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 16:11:28,744 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 16:11:28,774 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 16:11:29,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:11:29,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:29,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 16:11:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:29,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:29,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:29,514 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 56 treesize of output 45 [2023-11-17 16:11:29,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:29,523 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 98 treesize of output 91 [2023-11-17 16:11:29,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:29,536 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 83 treesize of output 69 [2023-11-17 16:11:29,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:29,547 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 35 treesize of output 33 [2023-11-17 16:11:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:29,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209067706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:29,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:29,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2023-11-17 16:11:29,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071358817] [2023-11-17 16:11:29,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:29,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-17 16:11:29,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:29,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-17 16:11:29,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1847, Unknown=8, NotChecked=0, Total=2070 [2023-11-17 16:11:29,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:11:29,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 1139 transitions, 23606 flow. Second operand has 46 states, 46 states have (on average 60.32608695652174) internal successors, (2775), 46 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:29,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:29,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:11:29,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:33,744 INFO L124 PetriNetUnfolderBase]: 2906/5057 cut-off events. [2023-11-17 16:11:33,744 INFO L125 PetriNetUnfolderBase]: For 514980/514980 co-relation queries the response was YES. [2023-11-17 16:11:33,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63541 conditions, 5057 events. 2906/5057 cut-off events. For 514980/514980 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33246 event pairs, 395 based on Foata normal form. 2/5025 useless extension candidates. Maximal degree in co-relation 63295. Up to 4778 conditions per place. [2023-11-17 16:11:33,819 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 1046 selfloop transitions, 153 changer transitions 9/1208 dead transitions. [2023-11-17 16:11:33,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 1208 transitions, 26796 flow [2023-11-17 16:11:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 16:11:33,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 16:11:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2757 transitions. [2023-11-17 16:11:33,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2712514757969303 [2023-11-17 16:11:33,821 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2757 transitions. [2023-11-17 16:11:33,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2757 transitions. [2023-11-17 16:11:33,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:33,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2757 transitions. [2023-11-17 16:11:33,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 62.65909090909091) internal successors, (2757), 44 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:33,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 231.0) internal successors, (10395), 45 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:33,827 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 231.0) internal successors, (10395), 45 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:33,827 INFO L175 Difference]: Start difference. First operand has 724 places, 1139 transitions, 23606 flow. Second operand 44 states and 2757 transitions. [2023-11-17 16:11:33,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 1208 transitions, 26796 flow [2023-11-17 16:11:36,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 744 places, 1208 transitions, 25920 flow, removed 392 selfloop flow, removed 23 redundant places. [2023-11-17 16:11:36,069 INFO L231 Difference]: Finished difference. Result has 748 places, 1148 transitions, 23443 flow [2023-11-17 16:11:36,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=22730, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=992, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=23443, PETRI_PLACES=748, PETRI_TRANSITIONS=1148} [2023-11-17 16:11:36,071 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 727 predicate places. [2023-11-17 16:11:36,071 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 1148 transitions, 23443 flow [2023-11-17 16:11:36,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 60.32608695652174) internal successors, (2775), 46 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:36,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:36,071 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:36,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-11-17 16:11:36,271 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,SelfDestructingSolverStorable61 [2023-11-17 16:11:36,272 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 16:11:36,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:36,272 INFO L85 PathProgramCache]: Analyzing trace with hash 618945218, now seen corresponding path program 58 times [2023-11-17 16:11:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:36,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986610743] [2023-11-17 16:11:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:36,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:36,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986610743] [2023-11-17 16:11:36,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986610743] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:36,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137385993] [2023-11-17 16:11:36,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:11:36,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:36,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:36,981 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 16:11:36,997 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 16:11:37,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:11:37,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:37,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:11:37,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:37,478 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:37,479 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 15 treesize of output 14 [2023-11-17 16:11:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:37,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:37,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:37,721 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 62 treesize of output 117 [2023-11-17 16:11:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:38,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137385993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:38,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:38,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-17 16:11:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847088358] [2023-11-17 16:11:38,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:38,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 16:11:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 16:11:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 16:11:38,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:11:38,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 1148 transitions, 23443 flow. Second operand has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:38,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:38,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:11:38,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:42,387 INFO L124 PetriNetUnfolderBase]: 2963/5161 cut-off events. [2023-11-17 16:11:42,387 INFO L125 PetriNetUnfolderBase]: For 532601/532601 co-relation queries the response was YES. [2023-11-17 16:11:42,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65299 conditions, 5161 events. 2963/5161 cut-off events. For 532601/532601 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 34133 event pairs, 393 based on Foata normal form. 2/5129 useless extension candidates. Maximal degree in co-relation 65048. Up to 4809 conditions per place. [2023-11-17 16:11:42,465 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 1062 selfloop transitions, 161 changer transitions 9/1232 dead transitions. [2023-11-17 16:11:42,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 1232 transitions, 27876 flow [2023-11-17 16:11:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 16:11:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 16:11:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2397 transitions. [2023-11-17 16:11:42,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27306903622693096 [2023-11-17 16:11:42,467 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2397 transitions. [2023-11-17 16:11:42,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2397 transitions. [2023-11-17 16:11:42,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:42,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2397 transitions. [2023-11-17 16:11:42,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 63.078947368421055) internal successors, (2397), 38 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:42,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 231.0) internal successors, (9009), 39 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:42,473 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 231.0) internal successors, (9009), 39 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:42,473 INFO L175 Difference]: Start difference. First operand has 748 places, 1148 transitions, 23443 flow. Second operand 38 states and 2397 transitions. [2023-11-17 16:11:42,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 1232 transitions, 27876 flow [2023-11-17 16:11:44,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 1232 transitions, 27475 flow, removed 140 selfloop flow, removed 31 redundant places. [2023-11-17 16:11:44,626 INFO L231 Difference]: Finished difference. Result has 760 places, 1170 transitions, 24555 flow [2023-11-17 16:11:44,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=23044, PETRI_DIFFERENCE_MINUEND_PLACES=716, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=998, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=24555, PETRI_PLACES=760, PETRI_TRANSITIONS=1170} [2023-11-17 16:11:44,627 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 739 predicate places. [2023-11-17 16:11:44,627 INFO L495 AbstractCegarLoop]: Abstraction has has 760 places, 1170 transitions, 24555 flow [2023-11-17 16:11:44,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:44,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:44,628 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:44,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-11-17 16:11:44,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:44,835 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 16:11:44,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash -360290798, now seen corresponding path program 59 times [2023-11-17 16:11:44,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:44,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41667225] [2023-11-17 16:11:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:44,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:45,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:45,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41667225] [2023-11-17 16:11:45,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41667225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:45,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687969668] [2023-11-17 16:11:45,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:11:45,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:45,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:45,510 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 16:11:45,512 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 16:11:45,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:11:45,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:45,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-17 16:11:45,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:45,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:11:45,685 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 16:11:45,770 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 16:11:45,801 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 16:11:45,830 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 16:11:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:46,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:46,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687969668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:46,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:46,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 35 [2023-11-17 16:11:46,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758396602] [2023-11-17 16:11:46,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:46,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:11:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:46,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:11:46,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2023-11-17 16:11:46,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:11:46,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 1170 transitions, 24555 flow. Second operand has 37 states, 37 states have (on average 60.54054054054054) internal successors, (2240), 37 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:46,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:46,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:11:46,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:49,994 INFO L124 PetriNetUnfolderBase]: 3020/5262 cut-off events. [2023-11-17 16:11:49,994 INFO L125 PetriNetUnfolderBase]: For 615134/615134 co-relation queries the response was YES. [2023-11-17 16:11:50,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69926 conditions, 5262 events. 3020/5262 cut-off events. For 615134/615134 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 34907 event pairs, 437 based on Foata normal form. 2/5230 useless extension candidates. Maximal degree in co-relation 69668. Up to 4913 conditions per place. [2023-11-17 16:11:50,075 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 1057 selfloop transitions, 162 changer transitions 2/1221 dead transitions. [2023-11-17 16:11:50,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 783 places, 1221 transitions, 29251 flow [2023-11-17 16:11:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:11:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:11:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1514 transitions. [2023-11-17 16:11:50,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2730880230880231 [2023-11-17 16:11:50,077 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1514 transitions. [2023-11-17 16:11:50,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1514 transitions. [2023-11-17 16:11:50,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:50,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1514 transitions. [2023-11-17 16:11:50,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 63.083333333333336) internal successors, (1514), 24 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:50,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 231.0) internal successors, (5775), 25 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:50,081 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 231.0) internal successors, (5775), 25 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:50,081 INFO L175 Difference]: Start difference. First operand has 760 places, 1170 transitions, 24555 flow. Second operand 24 states and 1514 transitions. [2023-11-17 16:11:50,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 783 places, 1221 transitions, 29251 flow [2023-11-17 16:11:52,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 1221 transitions, 28535 flow, removed 302 selfloop flow, removed 26 redundant places. [2023-11-17 16:11:52,731 INFO L231 Difference]: Finished difference. Result has 762 places, 1187 transitions, 25705 flow [2023-11-17 16:11:52,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=23839, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1018, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=25705, PETRI_PLACES=762, PETRI_TRANSITIONS=1187} [2023-11-17 16:11:52,732 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 741 predicate places. [2023-11-17 16:11:52,733 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 1187 transitions, 25705 flow [2023-11-17 16:11:52,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 60.54054054054054) internal successors, (2240), 37 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:52,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:52,733 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:52,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-17 16:11:52,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:52,937 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 16:11:52,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:52,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1909133560, now seen corresponding path program 60 times [2023-11-17 16:11:52,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:52,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396236937] [2023-11-17 16:11:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:52,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:53,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:53,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396236937] [2023-11-17 16:11:53,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396236937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:53,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855452818] [2023-11-17 16:11:53,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:11:53,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:53,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:53,522 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 16:11:53,523 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 16:11:53,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:11:53,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:53,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-17 16:11:53,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:54,034 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:54,035 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 17 treesize of output 14 [2023-11-17 16:11:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:54,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:54,412 INFO L349 Elim1Store]: treesize reduction 38, result has 67.0 percent of original size [2023-11-17 16:11:54,413 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 54 treesize of output 87 [2023-11-17 16:11:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:54,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855452818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:54,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:54,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-17 16:11:54,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556687659] [2023-11-17 16:11:54,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:54,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 16:11:54,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 16:11:54,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 16:11:54,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:11:54,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 1187 transitions, 25705 flow. Second operand has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:54,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:54,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:11:54,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:03,204 INFO L124 PetriNetUnfolderBase]: 3471/5986 cut-off events. [2023-11-17 16:12:03,205 INFO L125 PetriNetUnfolderBase]: For 886500/886500 co-relation queries the response was YES. [2023-11-17 16:12:03,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93258 conditions, 5986 events. 3471/5986 cut-off events. For 886500/886500 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 40244 event pairs, 452 based on Foata normal form. 5/5957 useless extension candidates. Maximal degree in co-relation 92994. Up to 5024 conditions per place. [2023-11-17 16:12:03,308 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 1150 selfloop transitions, 364 changer transitions 37/1551 dead transitions. [2023-11-17 16:12:03,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 851 places, 1551 transitions, 45260 flow [2023-11-17 16:12:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-17 16:12:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2023-11-17 16:12:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 5693 transitions. [2023-11-17 16:12:03,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2738335738335738 [2023-11-17 16:12:03,312 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 5693 transitions. [2023-11-17 16:12:03,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 5693 transitions. [2023-11-17 16:12:03,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:03,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 5693 transitions. [2023-11-17 16:12:03,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 63.25555555555555) internal successors, (5693), 90 states have internal predecessors, (5693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:03,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 231.0) internal successors, (21021), 91 states have internal predecessors, (21021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:03,334 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 231.0) internal successors, (21021), 91 states have internal predecessors, (21021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:03,334 INFO L175 Difference]: Start difference. First operand has 762 places, 1187 transitions, 25705 flow. Second operand 90 states and 5693 transitions. [2023-11-17 16:12:03,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 851 places, 1551 transitions, 45260 flow [2023-11-17 16:12:07,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 834 places, 1551 transitions, 43583 flow, removed 763 selfloop flow, removed 17 redundant places. [2023-11-17 16:12:07,145 INFO L231 Difference]: Finished difference. Result has 864 places, 1388 transitions, 38753 flow [2023-11-17 16:12:07,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=24269, PETRI_DIFFERENCE_MINUEND_PLACES=745, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=975, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=38753, PETRI_PLACES=864, PETRI_TRANSITIONS=1388} [2023-11-17 16:12:07,146 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 843 predicate places. [2023-11-17 16:12:07,146 INFO L495 AbstractCegarLoop]: Abstraction has has 864 places, 1388 transitions, 38753 flow [2023-11-17 16:12:07,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:07,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:07,147 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:07,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-17 16:12:07,347 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,SelfDestructingSolverStorable64 [2023-11-17 16:12:07,347 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 16:12:07,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash -262775740, now seen corresponding path program 61 times [2023-11-17 16:12:07,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:07,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250240374] [2023-11-17 16:12:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:07,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:07,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:07,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250240374] [2023-11-17 16:12:07,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250240374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:07,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307771602] [2023-11-17 16:12:07,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:12:07,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:07,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:07,988 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 16:12:07,990 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 16:12:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:08,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 16:12:08,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:08,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:08,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:08,601 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 52 treesize of output 89 [2023-11-17 16:12:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:12:08,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307771602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:08,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:08,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-11-17 16:12:08,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47174694] [2023-11-17 16:12:08,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:08,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:12:08,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:12:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 16:12:08,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:12:08,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 1388 transitions, 38753 flow. Second operand has 35 states, 35 states have (on average 60.74285714285714) internal successors, (2126), 35 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:08,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:08,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:12:08,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:13,773 INFO L124 PetriNetUnfolderBase]: 3551/6132 cut-off events. [2023-11-17 16:12:13,773 INFO L125 PetriNetUnfolderBase]: For 1077757/1077757 co-relation queries the response was YES. [2023-11-17 16:12:13,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100434 conditions, 6132 events. 3551/6132 cut-off events. For 1077757/1077757 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 41433 event pairs, 474 based on Foata normal form. 2/6100 useless extension candidates. Maximal degree in co-relation 100141. Up to 5817 conditions per place. [2023-11-17 16:12:13,918 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 1327 selfloop transitions, 159 changer transitions 2/1488 dead transitions. [2023-11-17 16:12:13,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 891 places, 1488 transitions, 46050 flow [2023-11-17 16:12:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 16:12:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 16:12:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1964 transitions. [2023-11-17 16:12:13,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2742633710375646 [2023-11-17 16:12:13,920 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1964 transitions. [2023-11-17 16:12:13,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1964 transitions. [2023-11-17 16:12:13,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:13,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1964 transitions. [2023-11-17 16:12:13,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 63.354838709677416) internal successors, (1964), 31 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:13,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 231.0) internal successors, (7392), 32 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:13,925 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 231.0) internal successors, (7392), 32 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:13,925 INFO L175 Difference]: Start difference. First operand has 864 places, 1388 transitions, 38753 flow. Second operand 31 states and 1964 transitions. [2023-11-17 16:12:13,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 891 places, 1488 transitions, 46050 flow [2023-11-17 16:12:20,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 863 places, 1488 transitions, 33980 flow, removed 5968 selfloop flow, removed 28 redundant places. [2023-11-17 16:12:20,739 INFO L231 Difference]: Finished difference. Result has 871 places, 1438 transitions, 30496 flow [2023-11-17 16:12:20,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=27091, PETRI_DIFFERENCE_MINUEND_PLACES=833, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=30496, PETRI_PLACES=871, PETRI_TRANSITIONS=1438} [2023-11-17 16:12:20,740 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 850 predicate places. [2023-11-17 16:12:20,741 INFO L495 AbstractCegarLoop]: Abstraction has has 871 places, 1438 transitions, 30496 flow [2023-11-17 16:12:20,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 60.74285714285714) internal successors, (2126), 35 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:20,741 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:20,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-17 16:12:20,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-11-17 16:12:20,942 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 16:12:20,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash -100819224, now seen corresponding path program 62 times [2023-11-17 16:12:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:20,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786605044] [2023-11-17 16:12:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:20,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:21,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:21,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786605044] [2023-11-17 16:12:21,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786605044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:21,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135658256] [2023-11-17 16:12:21,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:12:21,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:21,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:21,638 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 16:12:21,640 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 16:12:21,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:12:21,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:21,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-17 16:12:21,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:21,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:12:21,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:12:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:12:22,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:22,278 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1965 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1965) c_~A~0.base))) (= (let ((.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 4)) c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse1)))) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 (+ c_~A~0.offset 8)))))) is different from false [2023-11-17 16:12:22,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:22,321 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 104 treesize of output 132 [2023-11-17 16:12:22,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:22,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-11-17 16:12:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:12:22,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135658256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:22,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:22,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-11-17 16:12:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848825359] [2023-11-17 16:12:22,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:22,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:12:22,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:12:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1128, Unknown=1, NotChecked=68, Total=1332 [2023-11-17 16:12:22,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 231 [2023-11-17 16:12:22,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 871 places, 1438 transitions, 30496 flow. Second operand has 37 states, 37 states have (on average 63.5945945945946) internal successors, (2353), 37 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:22,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:22,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 231 [2023-11-17 16:12:22,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:27,503 INFO L124 PetriNetUnfolderBase]: 3681/6332 cut-off events. [2023-11-17 16:12:27,503 INFO L125 PetriNetUnfolderBase]: For 998861/998861 co-relation queries the response was YES. [2023-11-17 16:12:27,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90938 conditions, 6332 events. 3681/6332 cut-off events. For 998861/998861 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42566 event pairs, 452 based on Foata normal form. 1/6295 useless extension candidates. Maximal degree in co-relation 90642. Up to 5543 conditions per place. [2023-11-17 16:12:27,616 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 1152 selfloop transitions, 377 changer transitions 1/1530 dead transitions. [2023-11-17 16:12:27,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 1530 transitions, 37402 flow [2023-11-17 16:12:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:12:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:12:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1987 transitions. [2023-11-17 16:12:27,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2867243867243867 [2023-11-17 16:12:27,618 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1987 transitions. [2023-11-17 16:12:27,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1987 transitions. [2023-11-17 16:12:27,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:27,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1987 transitions. [2023-11-17 16:12:27,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 66.23333333333333) internal successors, (1987), 30 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:27,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 231.0) internal successors, (7161), 31 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:27,624 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 231.0) internal successors, (7161), 31 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:27,624 INFO L175 Difference]: Start difference. First operand has 871 places, 1438 transitions, 30496 flow. Second operand 30 states and 1987 transitions. [2023-11-17 16:12:27,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 1530 transitions, 37402 flow [2023-11-17 16:12:32,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 884 places, 1530 transitions, 35448 flow, removed 930 selfloop flow, removed 16 redundant places. [2023-11-17 16:12:32,700 INFO L231 Difference]: Finished difference. Result has 892 places, 1493 transitions, 33335 flow [2023-11-17 16:12:32,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=28614, PETRI_DIFFERENCE_MINUEND_PLACES=855, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1085, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=33335, PETRI_PLACES=892, PETRI_TRANSITIONS=1493} [2023-11-17 16:12:32,701 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 871 predicate places. [2023-11-17 16:12:32,701 INFO L495 AbstractCegarLoop]: Abstraction has has 892 places, 1493 transitions, 33335 flow [2023-11-17 16:12:32,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 63.5945945945946) internal successors, (2353), 37 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:32,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:32,701 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:32,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-11-17 16:12:32,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:32,902 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 16:12:32,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:32,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1149962270, now seen corresponding path program 63 times [2023-11-17 16:12:32,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:32,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562563571] [2023-11-17 16:12:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:32,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:33,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:33,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562563571] [2023-11-17 16:12:33,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562563571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:33,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258837415] [2023-11-17 16:12:33,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:12:33,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:33,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:33,413 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 16:12:33,415 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 16:12:33,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:12:33,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:33,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-17 16:12:33,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:33,661 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 16:12:33,691 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 16:12:33,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:12:33,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:12:33,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:33,920 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 17 treesize of output 14 [2023-11-17 16:12:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:34,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:34,200 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2001 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2001) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))))) is different from false [2023-11-17 16:12:34,204 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2001 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2001) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4))) (let ((.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse1)) (select .cse0 (+ c_~A~0.offset .cse1 4)) c_~counter~0))))) is different from false [2023-11-17 16:12:34,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:34,301 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 48 treesize of output 36 [2023-11-17 16:12:34,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 138 treesize of output 122 [2023-11-17 16:12:34,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-17 16:12:34,308 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 50 treesize of output 46 [2023-11-17 16:12:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-11-17 16:12:34,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258837415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:34,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:34,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 41 [2023-11-17 16:12:34,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200514934] [2023-11-17 16:12:34,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:34,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 16:12:34,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 16:12:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1433, Unknown=15, NotChecked=158, Total=1806 [2023-11-17 16:12:34,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:12:34,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 892 places, 1493 transitions, 33335 flow. Second operand has 43 states, 43 states have (on average 60.395348837209305) internal successors, (2597), 43 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:34,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:34,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:12:34,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:40,405 INFO L124 PetriNetUnfolderBase]: 3748/6460 cut-off events. [2023-11-17 16:12:40,405 INFO L125 PetriNetUnfolderBase]: For 1027408/1027408 co-relation queries the response was YES. [2023-11-17 16:12:40,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92433 conditions, 6460 events. 3748/6460 cut-off events. For 1027408/1027408 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 43777 event pairs, 405 based on Foata normal form. 1/6429 useless extension candidates. Maximal degree in co-relation 92128. Up to 5586 conditions per place. [2023-11-17 16:12:40,528 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 1144 selfloop transitions, 440 changer transitions 8/1592 dead transitions. [2023-11-17 16:12:40,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 932 places, 1592 transitions, 39250 flow [2023-11-17 16:12:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 16:12:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 16:12:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2570 transitions. [2023-11-17 16:12:40,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27135466159856403 [2023-11-17 16:12:40,531 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2570 transitions. [2023-11-17 16:12:40,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2570 transitions. [2023-11-17 16:12:40,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:40,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2570 transitions. [2023-11-17 16:12:40,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 62.68292682926829) internal successors, (2570), 41 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:40,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 231.0) internal successors, (9702), 42 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:40,540 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 231.0) internal successors, (9702), 42 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:40,540 INFO L175 Difference]: Start difference. First operand has 892 places, 1493 transitions, 33335 flow. Second operand 41 states and 2570 transitions. [2023-11-17 16:12:40,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 932 places, 1592 transitions, 39250 flow [2023-11-17 16:12:47,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 914 places, 1592 transitions, 35475 flow, removed 1760 selfloop flow, removed 18 redundant places. [2023-11-17 16:12:47,755 INFO L231 Difference]: Finished difference. Result has 921 places, 1535 transitions, 32852 flow [2023-11-17 16:12:47,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=29836, PETRI_DIFFERENCE_MINUEND_PLACES=874, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=32852, PETRI_PLACES=921, PETRI_TRANSITIONS=1535} [2023-11-17 16:12:47,756 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 900 predicate places. [2023-11-17 16:12:47,757 INFO L495 AbstractCegarLoop]: Abstraction has has 921 places, 1535 transitions, 32852 flow [2023-11-17 16:12:47,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 60.395348837209305) internal successors, (2597), 43 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:47,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:47,757 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:47,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-11-17 16:12:47,963 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,SelfDestructingSolverStorable67 [2023-11-17 16:12:47,964 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 16:12:47,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash 227454524, now seen corresponding path program 64 times [2023-11-17 16:12:47,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:47,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956399390] [2023-11-17 16:12:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:47,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:48,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:48,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956399390] [2023-11-17 16:12:48,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956399390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:48,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880000869] [2023-11-17 16:12:48,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:12:48,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:48,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:48,403 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 16:12:48,404 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 16:12:48,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:12:48,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:48,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-17 16:12:48,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:48,573 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 14 treesize of output 12 [2023-11-17 16:12:48,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:12:48,698 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 16:12:48,730 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 16:12:48,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:12:48,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:48,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 16:12:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:49,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:49,276 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2038 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2038) c_~A~0.base))) (= (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 (+ c_~A~0.offset 8))) (let ((.cse1 (* c_~N~0 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 (- 8))) c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse1 (- 4)))))))) is different from false [2023-11-17 16:12:49,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:49,333 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 75 [2023-11-17 16:12:49,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:49,352 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 326 treesize of output 298 [2023-11-17 16:12:49,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:49,370 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 70 treesize of output 58 [2023-11-17 16:12:49,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:49,429 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 53 treesize of output 64 [2023-11-17 16:12:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:49,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880000869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:49,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:49,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-11-17 16:12:49,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903731958] [2023-11-17 16:12:49,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:49,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 16:12:49,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 16:12:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1629, Unknown=1, NotChecked=82, Total=1892 [2023-11-17 16:12:49,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:12:49,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 921 places, 1535 transitions, 32852 flow. Second operand has 44 states, 44 states have (on average 60.38636363636363) internal successors, (2657), 44 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:49,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:49,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:12:49,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:55,260 INFO L124 PetriNetUnfolderBase]: 3794/6539 cut-off events. [2023-11-17 16:12:55,260 INFO L125 PetriNetUnfolderBase]: For 929626/929626 co-relation queries the response was YES. [2023-11-17 16:12:55,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89543 conditions, 6539 events. 3794/6539 cut-off events. For 929626/929626 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44537 event pairs, 484 based on Foata normal form. 2/6505 useless extension candidates. Maximal degree in co-relation 89234. Up to 6309 conditions per place. [2023-11-17 16:12:55,381 INFO L140 encePairwiseOnDemand]: 222/231 looper letters, 1494 selfloop transitions, 105 changer transitions 3/1602 dead transitions. [2023-11-17 16:12:55,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 950 places, 1602 transitions, 37780 flow [2023-11-17 16:12:55,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 16:12:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 16:12:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1955 transitions. [2023-11-17 16:12:55,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27300656332914397 [2023-11-17 16:12:55,383 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1955 transitions. [2023-11-17 16:12:55,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1955 transitions. [2023-11-17 16:12:55,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:55,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1955 transitions. [2023-11-17 16:12:55,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 63.064516129032256) internal successors, (1955), 31 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:55,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 231.0) internal successors, (7392), 32 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:55,388 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 231.0) internal successors, (7392), 32 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:55,388 INFO L175 Difference]: Start difference. First operand has 921 places, 1535 transitions, 32852 flow. Second operand 31 states and 1955 transitions. [2023-11-17 16:12:55,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 950 places, 1602 transitions, 37780 flow [2023-11-17 16:13:01,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 920 places, 1602 transitions, 35912 flow, removed 756 selfloop flow, removed 30 redundant places. [2023-11-17 16:13:01,771 INFO L231 Difference]: Finished difference. Result has 927 places, 1556 transitions, 32364 flow [2023-11-17 16:13:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=30984, PETRI_DIFFERENCE_MINUEND_PLACES=890, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=32364, PETRI_PLACES=927, PETRI_TRANSITIONS=1556} [2023-11-17 16:13:01,772 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 906 predicate places. [2023-11-17 16:13:01,772 INFO L495 AbstractCegarLoop]: Abstraction has has 927 places, 1556 transitions, 32364 flow [2023-11-17 16:13:01,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 60.38636363636363) internal successors, (2657), 44 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:01,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:01,773 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:01,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-11-17 16:13:01,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-17 16:13:01,973 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 16:13:01,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:01,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1038943946, now seen corresponding path program 65 times [2023-11-17 16:13:01,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:01,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259519938] [2023-11-17 16:13:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:02,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:02,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259519938] [2023-11-17 16:13:02,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259519938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:02,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535575003] [2023-11-17 16:13:02,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:13:02,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:02,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:02,492 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 16:13:02,494 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 16:13:02,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:13:02,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:02,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-17 16:13:02,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:13:02,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2023-11-17 16:13:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:13:02,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:03,086 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2071 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2071) c_~A~0.base))) (= (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 8)) (select .cse0 (+ c_~A~0.offset 4)))))) is different from false [2023-11-17 16:13:03,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:13:03,173 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 106 treesize of output 125 [2023-11-17 16:13:03,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:13:03,189 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 31 treesize of output 43 [2023-11-17 16:13:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:13:03,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535575003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:03,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:03,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-11-17 16:13:03,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218250736] [2023-11-17 16:13:03,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:03,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:13:03,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:13:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1129, Unknown=2, NotChecked=68, Total=1332 [2023-11-17 16:13:03,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 231 [2023-11-17 16:13:03,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 927 places, 1556 transitions, 32364 flow. Second operand has 37 states, 37 states have (on average 67.5945945945946) internal successors, (2501), 37 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:03,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:03,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 231 [2023-11-17 16:13:03,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:08,527 INFO L124 PetriNetUnfolderBase]: 3973/6820 cut-off events. [2023-11-17 16:13:08,527 INFO L125 PetriNetUnfolderBase]: For 997094/997094 co-relation queries the response was YES. [2023-11-17 16:13:08,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95023 conditions, 6820 events. 3973/6820 cut-off events. For 997094/997094 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 46415 event pairs, 441 based on Foata normal form. 2/6784 useless extension candidates. Maximal degree in co-relation 94711. Up to 6217 conditions per place. [2023-11-17 16:13:08,663 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 1392 selfloop transitions, 264 changer transitions 2/1658 dead transitions. [2023-11-17 16:13:08,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 953 places, 1658 transitions, 40064 flow [2023-11-17 16:13:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:13:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:13:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1906 transitions. [2023-11-17 16:13:08,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30559563892897224 [2023-11-17 16:13:08,665 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1906 transitions. [2023-11-17 16:13:08,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1906 transitions. [2023-11-17 16:13:08,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:08,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1906 transitions. [2023-11-17 16:13:08,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 70.5925925925926) internal successors, (1906), 27 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:08,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 231.0) internal successors, (6468), 28 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:08,669 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 231.0) internal successors, (6468), 28 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:08,669 INFO L175 Difference]: Start difference. First operand has 927 places, 1556 transitions, 32364 flow. Second operand 27 states and 1906 transitions. [2023-11-17 16:13:08,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 953 places, 1658 transitions, 40064 flow [2023-11-17 16:13:14,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 1658 transitions, 39211 flow, removed 386 selfloop flow, removed 17 redundant places. [2023-11-17 16:13:14,528 INFO L231 Difference]: Finished difference. Result has 946 places, 1611 transitions, 35904 flow [2023-11-17 16:13:14,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=31511, PETRI_DIFFERENCE_MINUEND_PLACES=910, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=35904, PETRI_PLACES=946, PETRI_TRANSITIONS=1611} [2023-11-17 16:13:14,530 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 925 predicate places. [2023-11-17 16:13:14,530 INFO L495 AbstractCegarLoop]: Abstraction has has 946 places, 1611 transitions, 35904 flow [2023-11-17 16:13:14,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 67.5945945945946) internal successors, (2501), 37 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:14,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:14,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:14,535 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 16:13:14,730 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,SelfDestructingSolverStorable69 [2023-11-17 16:13:14,731 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 16:13:14,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:14,731 INFO L85 PathProgramCache]: Analyzing trace with hash 366525960, now seen corresponding path program 66 times [2023-11-17 16:13:14,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:14,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784147584] [2023-11-17 16:13:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:14,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:15,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:15,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784147584] [2023-11-17 16:13:15,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784147584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:15,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966039200] [2023-11-17 16:13:15,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:13:15,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:15,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:15,378 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 16:13:15,379 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 16:13:15,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:13:15,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:15,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-17 16:13:15,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:15,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:13:15,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:13:15,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:13:15,909 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 15 treesize of output 14 [2023-11-17 16:13:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:15,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:16,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:13:16,230 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 110 treesize of output 157 [2023-11-17 16:13:16,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:13:16,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 89 [2023-11-17 16:13:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:17,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966039200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:17,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:17,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-11-17 16:13:17,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728830107] [2023-11-17 16:13:17,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:17,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-17 16:13:17,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:17,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-17 16:13:17,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1786, Unknown=3, NotChecked=0, Total=1980 [2023-11-17 16:13:17,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 231 [2023-11-17 16:13:17,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 946 places, 1611 transitions, 35904 flow. Second operand has 45 states, 45 states have (on average 63.44444444444444) internal successors, (2855), 45 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:17,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:17,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 231 [2023-11-17 16:13:17,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:22,955 INFO L124 PetriNetUnfolderBase]: 4059/6969 cut-off events. [2023-11-17 16:13:22,955 INFO L125 PetriNetUnfolderBase]: For 1127493/1127493 co-relation queries the response was YES. [2023-11-17 16:13:23,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100115 conditions, 6969 events. 4059/6969 cut-off events. For 1127493/1127493 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 47787 event pairs, 511 based on Foata normal form. 1/6936 useless extension candidates. Maximal degree in co-relation 99792. Up to 6530 conditions per place. [2023-11-17 16:13:23,206 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 1446 selfloop transitions, 245 changer transitions 3/1694 dead transitions. [2023-11-17 16:13:23,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 975 places, 1694 transitions, 41931 flow [2023-11-17 16:13:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:13:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:13:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1988 transitions. [2023-11-17 16:13:23,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2868686868686869 [2023-11-17 16:13:23,209 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1988 transitions. [2023-11-17 16:13:23,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1988 transitions. [2023-11-17 16:13:23,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:23,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1988 transitions. [2023-11-17 16:13:23,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 66.26666666666667) internal successors, (1988), 30 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:23,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 231.0) internal successors, (7161), 31 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:23,216 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 231.0) internal successors, (7161), 31 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:23,216 INFO L175 Difference]: Start difference. First operand has 946 places, 1611 transitions, 35904 flow. Second operand 30 states and 1988 transitions. [2023-11-17 16:13:23,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 975 places, 1694 transitions, 41931 flow [2023-11-17 16:13:30,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 960 places, 1694 transitions, 38876 flow, removed 1424 selfloop flow, removed 15 redundant places. [2023-11-17 16:13:30,493 INFO L231 Difference]: Finished difference. Result has 964 places, 1648 transitions, 35563 flow [2023-11-17 16:13:30,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=32855, PETRI_DIFFERENCE_MINUEND_PLACES=931, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=35563, PETRI_PLACES=964, PETRI_TRANSITIONS=1648} [2023-11-17 16:13:30,495 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 943 predicate places. [2023-11-17 16:13:30,495 INFO L495 AbstractCegarLoop]: Abstraction has has 964 places, 1648 transitions, 35563 flow [2023-11-17 16:13:30,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 63.44444444444444) internal successors, (2855), 45 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:30,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:30,495 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:30,500 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 16:13:30,695 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,SelfDestructingSolverStorable70 [2023-11-17 16:13:30,696 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 16:13:30,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash 567506608, now seen corresponding path program 67 times [2023-11-17 16:13:30,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:30,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231493870] [2023-11-17 16:13:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:31,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:31,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231493870] [2023-11-17 16:13:31,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231493870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:31,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820880303] [2023-11-17 16:13:31,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:13:31,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:31,142 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 16:13:31,143 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 16:13:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:31,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 16:13:31,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:31,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:31,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:13:31,742 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 52 treesize of output 89 [2023-11-17 16:13:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:13:31,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820880303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:31,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:31,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-11-17 16:13:31,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318166913] [2023-11-17 16:13:31,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:31,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 16:13:31,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:31,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 16:13:31,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 16:13:31,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 231 [2023-11-17 16:13:31,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 964 places, 1648 transitions, 35563 flow. Second operand has 34 states, 34 states have (on average 68.6470588235294) internal successors, (2334), 34 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:31,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:31,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 231 [2023-11-17 16:13:31,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:38,033 INFO L124 PetriNetUnfolderBase]: 4302/7378 cut-off events. [2023-11-17 16:13:38,033 INFO L125 PetriNetUnfolderBase]: For 1186958/1186958 co-relation queries the response was YES. [2023-11-17 16:13:38,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106954 conditions, 7378 events. 4302/7378 cut-off events. For 1186958/1186958 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 50654 event pairs, 519 based on Foata normal form. 2/7346 useless extension candidates. Maximal degree in co-relation 106627. Up to 6838 conditions per place. [2023-11-17 16:13:38,188 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 1584 selfloop transitions, 238 changer transitions 2/1824 dead transitions. [2023-11-17 16:13:38,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 992 places, 1824 transitions, 46092 flow [2023-11-17 16:13:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:13:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:13:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2070 transitions. [2023-11-17 16:13:38,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30900134348410213 [2023-11-17 16:13:38,190 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2070 transitions. [2023-11-17 16:13:38,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2070 transitions. [2023-11-17 16:13:38,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:38,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2070 transitions. [2023-11-17 16:13:38,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 71.37931034482759) internal successors, (2070), 29 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:38,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 231.0) internal successors, (6930), 30 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:38,195 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 231.0) internal successors, (6930), 30 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:38,195 INFO L175 Difference]: Start difference. First operand has 964 places, 1648 transitions, 35563 flow. Second operand 29 states and 2070 transitions. [2023-11-17 16:13:38,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 992 places, 1824 transitions, 46092 flow [2023-11-17 16:13:46,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 976 places, 1824 transitions, 44882 flow, removed 540 selfloop flow, removed 16 redundant places. [2023-11-17 16:13:46,572 INFO L231 Difference]: Finished difference. Result has 986 places, 1757 transitions, 40191 flow [2023-11-17 16:13:46,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=34384, PETRI_DIFFERENCE_MINUEND_PLACES=948, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=40191, PETRI_PLACES=986, PETRI_TRANSITIONS=1757} [2023-11-17 16:13:46,574 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 965 predicate places. [2023-11-17 16:13:46,574 INFO L495 AbstractCegarLoop]: Abstraction has has 986 places, 1757 transitions, 40191 flow [2023-11-17 16:13:46,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 68.6470588235294) internal successors, (2334), 34 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:46,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:46,574 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:46,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:46,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:46,775 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 16:13:46,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:46,775 INFO L85 PathProgramCache]: Analyzing trace with hash 376325390, now seen corresponding path program 68 times [2023-11-17 16:13:46,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:46,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491205836] [2023-11-17 16:13:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:46,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:47,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491205836] [2023-11-17 16:13:47,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491205836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065145373] [2023-11-17 16:13:47,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:13:47,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:47,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:47,261 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 16:13:47,263 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 16:13:47,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:13:47,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:47,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 16:13:47,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:47,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:13:47,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:13:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:13:47,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:47,878 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2169 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2169) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 8)) (select .cse0 (+ c_~A~0.offset 4))) (let ((.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse1 4)) (select .cse0 (+ c_~A~0.offset .cse1))))))) is different from false [2023-11-17 16:13:47,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:13:47,921 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 104 treesize of output 132 [2023-11-17 16:13:47,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:13:47,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-11-17 16:13:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:13:48,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065145373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:48,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:48,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-11-17 16:13:48,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903003564] [2023-11-17 16:13:48,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:48,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:13:48,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:48,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:13:48,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1128, Unknown=1, NotChecked=68, Total=1332 [2023-11-17 16:13:48,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 231 [2023-11-17 16:13:48,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 986 places, 1757 transitions, 40191 flow. Second operand has 37 states, 37 states have (on average 63.45945945945946) internal successors, (2348), 37 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:48,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:48,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 231 [2023-11-17 16:13:48,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:55,352 INFO L124 PetriNetUnfolderBase]: 4389/7532 cut-off events. [2023-11-17 16:13:55,352 INFO L125 PetriNetUnfolderBase]: For 1298020/1298020 co-relation queries the response was YES. [2023-11-17 16:13:55,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111763 conditions, 7532 events. 4389/7532 cut-off events. For 1298020/1298020 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 52288 event pairs, 474 based on Foata normal form. 1/7499 useless extension candidates. Maximal degree in co-relation 111425. Up to 6637 conditions per place. [2023-11-17 16:13:55,625 INFO L140 encePairwiseOnDemand]: 220/231 looper letters, 1470 selfloop transitions, 360 changer transitions 1/1831 dead transitions. [2023-11-17 16:13:55,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1018 places, 1831 transitions, 46419 flow [2023-11-17 16:13:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:13:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:13:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2187 transitions. [2023-11-17 16:13:55,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28689492325855964 [2023-11-17 16:13:55,627 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2187 transitions. [2023-11-17 16:13:55,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2187 transitions. [2023-11-17 16:13:55,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:55,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2187 transitions. [2023-11-17 16:13:55,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 66.27272727272727) internal successors, (2187), 33 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:55,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 231.0) internal successors, (7854), 34 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:55,632 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 231.0) internal successors, (7854), 34 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:55,632 INFO L175 Difference]: Start difference. First operand has 986 places, 1757 transitions, 40191 flow. Second operand 33 states and 2187 transitions. [2023-11-17 16:13:55,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1018 places, 1831 transitions, 46419 flow [2023-11-17 16:14:04,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1009 places, 1831 transitions, 44828 flow, removed 764 selfloop flow, removed 9 redundant places. [2023-11-17 16:14:05,030 INFO L231 Difference]: Finished difference. Result has 1011 places, 1775 transitions, 40891 flow [2023-11-17 16:14:05,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=38600, PETRI_DIFFERENCE_MINUEND_PLACES=977, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=40891, PETRI_PLACES=1011, PETRI_TRANSITIONS=1775} [2023-11-17 16:14:05,032 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 990 predicate places. [2023-11-17 16:14:05,032 INFO L495 AbstractCegarLoop]: Abstraction has has 1011 places, 1775 transitions, 40891 flow [2023-11-17 16:14:05,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 63.45945945945946) internal successors, (2348), 37 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:05,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:05,033 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:05,037 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 16:14:05,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:05,233 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 16:14:05,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:05,233 INFO L85 PathProgramCache]: Analyzing trace with hash 774088968, now seen corresponding path program 69 times [2023-11-17 16:14:05,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:05,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130282426] [2023-11-17 16:14:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:05,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:05,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:05,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130282426] [2023-11-17 16:14:05,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130282426] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:05,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067137134] [2023-11-17 16:14:05,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:14:05,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:05,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:05,853 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 16:14:05,855 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 16:14:06,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:14:06,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:06,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-17 16:14:06,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:06,085 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 16:14:06,127 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 16:14:06,153 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 16:14:06,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:14:06,408 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 19 treesize of output 16 [2023-11-17 16:14:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:14:06,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:14:06,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067137134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:06,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:06,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 38 [2023-11-17 16:14:06,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653457141] [2023-11-17 16:14:06,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:06,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 16:14:06,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:06,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 16:14:06,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 16:14:06,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:14:06,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1011 places, 1775 transitions, 40891 flow. Second operand has 40 states, 40 states have (on average 60.475) internal successors, (2419), 40 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:06,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:14:06,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:14,402 INFO L124 PetriNetUnfolderBase]: 4406/7581 cut-off events. [2023-11-17 16:14:14,402 INFO L125 PetriNetUnfolderBase]: For 1302932/1302932 co-relation queries the response was YES. [2023-11-17 16:14:14,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111694 conditions, 7581 events. 4406/7581 cut-off events. For 1302932/1302932 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 52788 event pairs, 622 based on Foata normal form. 1/7548 useless extension candidates. Maximal degree in co-relation 111353. Up to 7239 conditions per place. [2023-11-17 16:14:14,549 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 1620 selfloop transitions, 193 changer transitions 5/1818 dead transitions. [2023-11-17 16:14:14,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1038 places, 1818 transitions, 45475 flow [2023-11-17 16:14:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:14:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:14:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1745 transitions. [2023-11-17 16:14:14,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2697897340754484 [2023-11-17 16:14:14,551 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1745 transitions. [2023-11-17 16:14:14,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1745 transitions. [2023-11-17 16:14:14,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:14,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1745 transitions. [2023-11-17 16:14:14,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 62.32142857142857) internal successors, (1745), 28 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:14,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 231.0) internal successors, (6699), 29 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:14,555 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 231.0) internal successors, (6699), 29 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:14,555 INFO L175 Difference]: Start difference. First operand has 1011 places, 1775 transitions, 40891 flow. Second operand 28 states and 1745 transitions. [2023-11-17 16:14:14,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1038 places, 1818 transitions, 45475 flow [2023-11-17 16:14:23,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1017 places, 1818 transitions, 44232 flow, removed 476 selfloop flow, removed 21 redundant places. [2023-11-17 16:14:23,057 INFO L231 Difference]: Finished difference. Result has 1022 places, 1790 transitions, 40871 flow [2023-11-17 16:14:23,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=39648, PETRI_DIFFERENCE_MINUEND_PLACES=990, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=40871, PETRI_PLACES=1022, PETRI_TRANSITIONS=1790} [2023-11-17 16:14:23,059 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1001 predicate places. [2023-11-17 16:14:23,059 INFO L495 AbstractCegarLoop]: Abstraction has has 1022 places, 1790 transitions, 40871 flow [2023-11-17 16:14:23,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 60.475) internal successors, (2419), 40 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:23,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:23,060 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:23,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-11-17 16:14:23,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:23,261 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 16:14:23,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:23,261 INFO L85 PathProgramCache]: Analyzing trace with hash -411488948, now seen corresponding path program 70 times [2023-11-17 16:14:23,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:23,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692670285] [2023-11-17 16:14:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:23,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:23,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:23,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692670285] [2023-11-17 16:14:23,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692670285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:23,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940790694] [2023-11-17 16:14:23,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:14:23,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:23,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:23,927 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 16:14:23,928 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 16:14:24,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:14:24,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:24,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:14:24,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:24,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:14:24,471 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 15 treesize of output 14 [2023-11-17 16:14:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:24,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:24,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:14:24,725 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 55 treesize of output 111 [2023-11-17 16:14:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:25,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940790694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:25,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:25,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-11-17 16:14:25,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192465696] [2023-11-17 16:14:25,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:25,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 16:14:25,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:25,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 16:14:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 16:14:25,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:14:25,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1022 places, 1790 transitions, 40871 flow. Second operand has 42 states, 42 states have (on average 60.38095238095238) internal successors, (2536), 42 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:25,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:14:25,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:32,729 INFO L124 PetriNetUnfolderBase]: 4527/7788 cut-off events. [2023-11-17 16:14:32,729 INFO L125 PetriNetUnfolderBase]: For 1375600/1375600 co-relation queries the response was YES. [2023-11-17 16:14:32,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116490 conditions, 7788 events. 4527/7788 cut-off events. For 1375600/1375600 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 54502 event pairs, 508 based on Foata normal form. 2/7756 useless extension candidates. Maximal degree in co-relation 116145. Up to 7201 conditions per place. [2023-11-17 16:14:32,896 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 1628 selfloop transitions, 269 changer transitions 4/1901 dead transitions. [2023-11-17 16:14:32,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 1901 transitions, 48355 flow [2023-11-17 16:14:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 16:14:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 16:14:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2462 transitions. [2023-11-17 16:14:32,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2732822732822733 [2023-11-17 16:14:32,899 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2462 transitions. [2023-11-17 16:14:32,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2462 transitions. [2023-11-17 16:14:32,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:32,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2462 transitions. [2023-11-17 16:14:32,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 63.12820512820513) internal successors, (2462), 39 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:32,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 231.0) internal successors, (9240), 40 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:32,904 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 231.0) internal successors, (9240), 40 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:32,904 INFO L175 Difference]: Start difference. First operand has 1022 places, 1790 transitions, 40871 flow. Second operand 39 states and 2462 transitions. [2023-11-17 16:14:32,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 1901 transitions, 48355 flow [2023-11-17 16:14:42,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1038 places, 1901 transitions, 47154 flow, removed 481 selfloop flow, removed 21 redundant places. [2023-11-17 16:14:42,842 INFO L231 Difference]: Finished difference. Result has 1044 places, 1837 transitions, 43051 flow [2023-11-17 16:14:42,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=40064, PETRI_DIFFERENCE_MINUEND_PLACES=1000, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=43051, PETRI_PLACES=1044, PETRI_TRANSITIONS=1837} [2023-11-17 16:14:42,844 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1023 predicate places. [2023-11-17 16:14:42,844 INFO L495 AbstractCegarLoop]: Abstraction has has 1044 places, 1837 transitions, 43051 flow [2023-11-17 16:14:42,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 60.38095238095238) internal successors, (2536), 42 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:42,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:42,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:42,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-11-17 16:14:43,045 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,SelfDestructingSolverStorable74 [2023-11-17 16:14:43,046 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 16:14:43,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:43,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1330579890, now seen corresponding path program 71 times [2023-11-17 16:14:43,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:43,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474829744] [2023-11-17 16:14:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:43,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:43,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:43,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474829744] [2023-11-17 16:14:43,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474829744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:43,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394339173] [2023-11-17 16:14:43,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:14:43,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:43,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:43,596 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 16:14:43,597 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 16:14:43,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:14:43,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:43,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 16:14:43,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:43,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:14:43,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:14:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:44,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:44,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:14:44,346 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 104 treesize of output 132 [2023-11-17 16:14:44,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:14:44,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-11-17 16:14:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:14:44,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394339173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:44,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:44,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-11-17 16:14:44,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564236203] [2023-11-17 16:14:44,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:44,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 16:14:44,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 16:14:44,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1334, Unknown=6, NotChecked=0, Total=1482 [2023-11-17 16:14:44,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:14:44,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1044 places, 1837 transitions, 43051 flow. Second operand has 39 states, 39 states have (on average 60.56410256410256) internal successors, (2362), 39 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:44,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:44,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:14:44,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:52,037 INFO L124 PetriNetUnfolderBase]: 4664/8027 cut-off events. [2023-11-17 16:14:52,037 INFO L125 PetriNetUnfolderBase]: For 1484102/1484102 co-relation queries the response was YES. [2023-11-17 16:14:52,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122514 conditions, 8027 events. 4664/8027 cut-off events. For 1484102/1484102 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 56553 event pairs, 575 based on Foata normal form. 2/7995 useless extension candidates. Maximal degree in co-relation 122163. Up to 7173 conditions per place. [2023-11-17 16:14:52,214 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 1547 selfloop transitions, 383 changer transitions 1/1931 dead transitions. [2023-11-17 16:14:52,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1069 places, 1931 transitions, 50113 flow [2023-11-17 16:14:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:14:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:14:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1653 transitions. [2023-11-17 16:14:52,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27522477522477523 [2023-11-17 16:14:52,216 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1653 transitions. [2023-11-17 16:14:52,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1653 transitions. [2023-11-17 16:14:52,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:52,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1653 transitions. [2023-11-17 16:14:52,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 63.57692307692308) internal successors, (1653), 26 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:52,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 231.0) internal successors, (6237), 27 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:52,220 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 231.0) internal successors, (6237), 27 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:52,220 INFO L175 Difference]: Start difference. First operand has 1044 places, 1837 transitions, 43051 flow. Second operand 26 states and 1653 transitions. [2023-11-17 16:14:52,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1069 places, 1931 transitions, 50113 flow [2023-11-17 16:15:01,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1040 places, 1931 transitions, 49030 flow, removed 431 selfloop flow, removed 29 redundant places. [2023-11-17 16:15:01,108 INFO L231 Difference]: Finished difference. Result has 1047 places, 1882 transitions, 45172 flow [2023-11-17 16:15:01,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=41968, PETRI_DIFFERENCE_MINUEND_PLACES=1015, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=45172, PETRI_PLACES=1047, PETRI_TRANSITIONS=1882} [2023-11-17 16:15:01,109 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1026 predicate places. [2023-11-17 16:15:01,110 INFO L495 AbstractCegarLoop]: Abstraction has has 1047 places, 1882 transitions, 45172 flow [2023-11-17 16:15:01,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 60.56410256410256) internal successors, (2362), 39 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:01,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:01,110 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:01,115 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 16:15:01,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:01,311 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 16:15:01,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:01,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1759229804, now seen corresponding path program 72 times [2023-11-17 16:15:01,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:01,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703877571] [2023-11-17 16:15:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:01,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:01,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:01,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703877571] [2023-11-17 16:15:01,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703877571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:15:01,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616942679] [2023-11-17 16:15:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:15:01,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:01,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:15:01,872 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 16:15:01,873 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 16:15:02,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-17 16:15:02,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:15:02,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-17 16:15:02,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:15:02,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:15:02,362 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 19 treesize of output 16 [2023-11-17 16:15:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:15:02,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:15:02,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:15:02,616 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 35 treesize of output 43 [2023-11-17 16:15:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:15:02,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616942679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:15:02,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:15:02,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 35 [2023-11-17 16:15:02,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532630935] [2023-11-17 16:15:02,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:15:02,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:15:02,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:02,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:15:02,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2023-11-17 16:15:02,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:15:02,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 1882 transitions, 45172 flow. Second operand has 37 states, 37 states have (on average 60.7027027027027) internal successors, (2246), 37 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:02,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:02,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:15:02,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:10,937 INFO L124 PetriNetUnfolderBase]: 4716/8118 cut-off events. [2023-11-17 16:15:10,938 INFO L125 PetriNetUnfolderBase]: For 1510150/1510150 co-relation queries the response was YES. [2023-11-17 16:15:11,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124896 conditions, 8118 events. 4716/8118 cut-off events. For 1510150/1510150 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 57336 event pairs, 670 based on Foata normal form. 1/8085 useless extension candidates. Maximal degree in co-relation 124539. Up to 7662 conditions per place. [2023-11-17 16:15:11,118 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 1685 selfloop transitions, 265 changer transitions 6/1956 dead transitions. [2023-11-17 16:15:11,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1083 places, 1956 transitions, 50893 flow [2023-11-17 16:15:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:15:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:15:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2319 transitions. [2023-11-17 16:15:11,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27132327132327133 [2023-11-17 16:15:11,120 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2319 transitions. [2023-11-17 16:15:11,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2319 transitions. [2023-11-17 16:15:11,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:11,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2319 transitions. [2023-11-17 16:15:11,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 62.67567567567568) internal successors, (2319), 37 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:11,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 231.0) internal successors, (8778), 38 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:11,125 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 231.0) internal successors, (8778), 38 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:11,125 INFO L175 Difference]: Start difference. First operand has 1047 places, 1882 transitions, 45172 flow. Second operand 37 states and 2319 transitions. [2023-11-17 16:15:11,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1083 places, 1956 transitions, 50893 flow [2023-11-17 16:15:20,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1069 places, 1956 transitions, 49604 flow, removed 498 selfloop flow, removed 14 redundant places. [2023-11-17 16:15:20,742 INFO L231 Difference]: Finished difference. Result has 1075 places, 1912 transitions, 46138 flow [2023-11-17 16:15:20,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=43891, PETRI_DIFFERENCE_MINUEND_PLACES=1033, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=46138, PETRI_PLACES=1075, PETRI_TRANSITIONS=1912} [2023-11-17 16:15:20,745 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1054 predicate places. [2023-11-17 16:15:20,745 INFO L495 AbstractCegarLoop]: Abstraction has has 1075 places, 1912 transitions, 46138 flow [2023-11-17 16:15:20,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 60.7027027027027) internal successors, (2246), 37 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:20,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:20,745 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:20,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-11-17 16:15:20,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:20,951 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 16:15:20,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1632717720, now seen corresponding path program 73 times [2023-11-17 16:15:20,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:20,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907208455] [2023-11-17 16:15:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:20,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:21,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:21,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907208455] [2023-11-17 16:15:21,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907208455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:15:21,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634174433] [2023-11-17 16:15:21,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:15:21,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:21,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:15:21,371 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 16:15:21,373 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 16:15:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:21,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 16:15:21,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:15:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:15:21,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:15:21,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:15:21,797 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 52 treesize of output 89 [2023-11-17 16:15:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:15:21,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634174433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:15:21,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:15:21,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 22 [2023-11-17 16:15:21,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281654889] [2023-11-17 16:15:21,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:15:21,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:15:21,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:15:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:15:21,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 231 [2023-11-17 16:15:21,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1075 places, 1912 transitions, 46138 flow. Second operand has 24 states, 24 states have (on average 75.83333333333333) internal successors, (1820), 24 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 16:15:21,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:21,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 231 [2023-11-17 16:15:21,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:30,125 INFO L124 PetriNetUnfolderBase]: 4754/8182 cut-off events. [2023-11-17 16:15:30,125 INFO L125 PetriNetUnfolderBase]: For 1570449/1570449 co-relation queries the response was YES. [2023-11-17 16:15:30,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126643 conditions, 8182 events. 4754/8182 cut-off events. For 1570449/1570449 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 57839 event pairs, 670 based on Foata normal form. 1/8149 useless extension candidates. Maximal degree in co-relation 126279. Up to 7902 conditions per place. [2023-11-17 16:15:30,404 INFO L140 encePairwiseOnDemand]: 223/231 looper letters, 1808 selfloop transitions, 138 changer transitions 1/1947 dead transitions. [2023-11-17 16:15:30,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1090 places, 1947 transitions, 51775 flow [2023-11-17 16:15:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:15:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:15:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1329 transitions. [2023-11-17 16:15:30,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384262796027502 [2023-11-17 16:15:30,406 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1329 transitions. [2023-11-17 16:15:30,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1329 transitions. [2023-11-17 16:15:30,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:30,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1329 transitions. [2023-11-17 16:15:30,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 78.17647058823529) internal successors, (1329), 17 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:30,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 231.0) internal successors, (4158), 18 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:30,408 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 231.0) internal successors, (4158), 18 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:30,408 INFO L175 Difference]: Start difference. First operand has 1075 places, 1912 transitions, 46138 flow. Second operand 17 states and 1329 transitions. [2023-11-17 16:15:30,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1090 places, 1947 transitions, 51775 flow [2023-11-17 16:15:42,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1066 places, 1947 transitions, 50706 flow, removed 444 selfloop flow, removed 24 redundant places. [2023-11-17 16:15:42,047 INFO L231 Difference]: Finished difference. Result has 1071 places, 1924 transitions, 46401 flow [2023-11-17 16:15:42,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=45069, PETRI_DIFFERENCE_MINUEND_PLACES=1050, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=46401, PETRI_PLACES=1071, PETRI_TRANSITIONS=1924} [2023-11-17 16:15:42,049 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1050 predicate places. [2023-11-17 16:15:42,049 INFO L495 AbstractCegarLoop]: Abstraction has has 1071 places, 1924 transitions, 46401 flow [2023-11-17 16:15:42,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 75.83333333333333) internal successors, (1820), 24 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 16:15:42,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:15:42,050 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:15:42,055 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 16:15:42,252 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,SelfDestructingSolverStorable77 [2023-11-17 16:15:42,253 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 16:15:42,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:15:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1814378930, now seen corresponding path program 74 times [2023-11-17 16:15:42,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:15:42,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269829184] [2023-11-17 16:15:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:15:42,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:15:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:15:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:42,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:15:42,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269829184] [2023-11-17 16:15:42,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269829184] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:15:42,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739194768] [2023-11-17 16:15:42,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:15:42,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:15:42,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:15:42,819 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 16:15:42,833 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 16:15:43,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:15:43,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:15:43,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 16:15:43,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:15:43,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:15:43,334 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 15 treesize of output 14 [2023-11-17 16:15:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:43,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:15:43,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:15:43,591 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 55 treesize of output 111 [2023-11-17 16:15:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:15:44,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739194768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:15:44,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:15:44,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-17 16:15:44,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213869680] [2023-11-17 16:15:44,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:15:44,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 16:15:44,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:15:44,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 16:15:44,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 16:15:44,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:15:44,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1071 places, 1924 transitions, 46401 flow. Second operand has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:44,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:15:44,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:15:44,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:15:52,652 INFO L124 PetriNetUnfolderBase]: 4795/8268 cut-off events. [2023-11-17 16:15:52,653 INFO L125 PetriNetUnfolderBase]: For 1583133/1583133 co-relation queries the response was YES. [2023-11-17 16:15:52,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128011 conditions, 8268 events. 4795/8268 cut-off events. For 1583133/1583133 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 58788 event pairs, 689 based on Foata normal form. 2/8236 useless extension candidates. Maximal degree in co-relation 127643. Up to 7702 conditions per place. [2023-11-17 16:15:52,840 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 1700 selfloop transitions, 297 changer transitions 6/2003 dead transitions. [2023-11-17 16:15:52,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1114 places, 2003 transitions, 52599 flow [2023-11-17 16:15:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 16:15:52,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 16:15:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2757 transitions. [2023-11-17 16:15:52,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2712514757969303 [2023-11-17 16:15:52,842 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2757 transitions. [2023-11-17 16:15:52,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2757 transitions. [2023-11-17 16:15:52,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:15:52,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2757 transitions. [2023-11-17 16:15:52,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 62.65909090909091) internal successors, (2757), 44 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:52,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 231.0) internal successors, (10395), 45 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:52,849 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 231.0) internal successors, (10395), 45 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:15:52,849 INFO L175 Difference]: Start difference. First operand has 1071 places, 1924 transitions, 46401 flow. Second operand 44 states and 2757 transitions. [2023-11-17 16:15:52,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1114 places, 2003 transitions, 52599 flow [2023-11-17 16:16:03,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1104 places, 2003 transitions, 51974 flow, removed 257 selfloop flow, removed 10 redundant places. [2023-11-17 16:16:03,718 INFO L231 Difference]: Finished difference. Result has 1110 places, 1947 transitions, 48301 flow [2023-11-17 16:16:03,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=45778, PETRI_DIFFERENCE_MINUEND_PLACES=1061, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=48301, PETRI_PLACES=1110, PETRI_TRANSITIONS=1947} [2023-11-17 16:16:03,720 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1089 predicate places. [2023-11-17 16:16:03,721 INFO L495 AbstractCegarLoop]: Abstraction has has 1110 places, 1947 transitions, 48301 flow [2023-11-17 16:16:03,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 60.41860465116279) internal successors, (2598), 43 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:03,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:16:03,721 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:16:03,727 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 16:16:03,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-11-17 16:16:03,927 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 16:16:03,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:16:03,927 INFO L85 PathProgramCache]: Analyzing trace with hash 934279134, now seen corresponding path program 75 times [2023-11-17 16:16:03,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:16:03,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752145583] [2023-11-17 16:16:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:16:03,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:16:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:16:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:16:04,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:16:04,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752145583] [2023-11-17 16:16:04,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752145583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:16:04,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805783432] [2023-11-17 16:16:04,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:16:04,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:04,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:16:04,369 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 16:16:04,370 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 16:16:04,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:16:04,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:16:04,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-17 16:16:04,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:16:04,685 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 16:16:04,719 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 16:16:04,748 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 16:16:05,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:16:05,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:16:05,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 16:16:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:16:05,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:16:05,376 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2401 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2401) c_~A~0.base))) (= (select .cse0 (+ c_~A~0.offset (* c_~N~0 4) (- 8))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset 4)))))) is different from false [2023-11-17 16:16:05,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:16:05,431 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 56 treesize of output 45 [2023-11-17 16:16:05,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:16:05,437 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 98 treesize of output 91 [2023-11-17 16:16:05,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:16:05,444 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 83 treesize of output 69 [2023-11-17 16:16:05,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:16:05,452 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 35 treesize of output 33 [2023-11-17 16:16:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:16:05,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805783432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:16:05,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:16:05,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2023-11-17 16:16:05,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677015368] [2023-11-17 16:16:05,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:16:05,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-17 16:16:05,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:16:05,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-17 16:16:05,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1772, Unknown=1, NotChecked=86, Total=2070 [2023-11-17 16:16:05,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 231 [2023-11-17 16:16:05,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1110 places, 1947 transitions, 48301 flow. Second operand has 46 states, 46 states have (on average 60.41304347826087) internal successors, (2779), 46 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:05,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:16:05,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 231 [2023-11-17 16:16:05,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:16:14,966 INFO L124 PetriNetUnfolderBase]: 4896/8448 cut-off events. [2023-11-17 16:16:14,966 INFO L125 PetriNetUnfolderBase]: For 1741559/1741559 co-relation queries the response was YES. [2023-11-17 16:16:15,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135902 conditions, 8448 events. 4896/8448 cut-off events. For 1741559/1741559 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 60383 event pairs, 697 based on Foata normal form. 3/8417 useless extension candidates. Maximal degree in co-relation 135527. Up to 8085 conditions per place. [2023-11-17 16:16:15,169 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 1885 selfloop transitions, 164 changer transitions 10/2059 dead transitions. [2023-11-17 16:16:15,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1152 places, 2059 transitions, 56966 flow [2023-11-17 16:16:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-17 16:16:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-17 16:16:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2721 transitions. [2023-11-17 16:16:15,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27393536695862275 [2023-11-17 16:16:15,171 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2721 transitions. [2023-11-17 16:16:15,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2721 transitions. [2023-11-17 16:16:15,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:16:15,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2721 transitions. [2023-11-17 16:16:15,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 63.27906976744186) internal successors, (2721), 43 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:15,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 231.0) internal successors, (10164), 44 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:15,178 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 231.0) internal successors, (10164), 44 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:15,178 INFO L175 Difference]: Start difference. First operand has 1110 places, 1947 transitions, 48301 flow. Second operand 43 states and 2721 transitions. [2023-11-17 16:16:15,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1152 places, 2059 transitions, 56966 flow [2023-11-17 16:16:28,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1115 places, 2059 transitions, 55248 flow, removed 718 selfloop flow, removed 37 redundant places. [2023-11-17 16:16:28,194 INFO L231 Difference]: Finished difference. Result has 1123 places, 1981 transitions, 50490 flow [2023-11-17 16:16:28,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=46847, PETRI_DIFFERENCE_MINUEND_PLACES=1073, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1805, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=50490, PETRI_PLACES=1123, PETRI_TRANSITIONS=1981} [2023-11-17 16:16:28,196 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1102 predicate places. [2023-11-17 16:16:28,196 INFO L495 AbstractCegarLoop]: Abstraction has has 1123 places, 1981 transitions, 50490 flow [2023-11-17 16:16:28,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 60.41304347826087) internal successors, (2779), 46 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:28,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:16:28,196 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:16:28,201 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 16:16:28,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:28,397 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 16:16:28,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:16:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1535079446, now seen corresponding path program 76 times [2023-11-17 16:16:28,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:16:28,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575871565] [2023-11-17 16:16:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:16:28,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:16:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:16:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:16:28,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:16:28,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575871565] [2023-11-17 16:16:28,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575871565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:16:28,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446516899] [2023-11-17 16:16:28,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:16:28,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:28,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:16:28,899 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 16:16:28,900 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 16:16:29,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:16:29,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:16:29,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-17 16:16:29,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:16:29,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:16:29,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 16:16:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:16:29,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:16:29,592 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2434 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2434) c_~A~0.base))) (= (let ((.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 4)) c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse1)))) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 8)) (select .cse0 (+ c_~A~0.offset 4)))))) is different from false [2023-11-17 16:16:29,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:16:29,634 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 104 treesize of output 132 [2023-11-17 16:16:29,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:16:29,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-11-17 16:16:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:16:29,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446516899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:16:29,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:16:29,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-11-17 16:16:29,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591612260] [2023-11-17 16:16:29,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:16:29,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 16:16:29,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:16:29,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 16:16:29,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1274, Unknown=1, NotChecked=72, Total=1482 [2023-11-17 16:16:29,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 231 [2023-11-17 16:16:29,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1123 places, 1981 transitions, 50490 flow. Second operand has 39 states, 39 states have (on average 63.56410256410256) internal successors, (2479), 39 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:29,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:16:29,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 231 [2023-11-17 16:16:29,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:16:39,091 INFO L124 PetriNetUnfolderBase]: 4941/8525 cut-off events. [2023-11-17 16:16:39,092 INFO L125 PetriNetUnfolderBase]: For 1832903/1832903 co-relation queries the response was YES. [2023-11-17 16:16:39,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138536 conditions, 8525 events. 4941/8525 cut-off events. For 1832903/1832903 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 61110 event pairs, 553 based on Foata normal form. 2/8491 useless extension candidates. Maximal degree in co-relation 138155. Up to 7509 conditions per place. [2023-11-17 16:16:39,298 INFO L140 encePairwiseOnDemand]: 221/231 looper letters, 1667 selfloop transitions, 359 changer transitions 1/2027 dead transitions. [2023-11-17 16:16:39,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1145 places, 2027 transitions, 55982 flow [2023-11-17 16:16:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:16:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:16:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1589 transitions. [2023-11-17 16:16:39,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2866161616161616 [2023-11-17 16:16:39,301 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1589 transitions. [2023-11-17 16:16:39,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1589 transitions. [2023-11-17 16:16:39,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:16:39,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1589 transitions. [2023-11-17 16:16:39,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 66.20833333333333) internal successors, (1589), 24 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:39,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 231.0) internal successors, (5775), 25 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:39,305 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 231.0) internal successors, (5775), 25 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:16:39,305 INFO L175 Difference]: Start difference. First operand has 1123 places, 1981 transitions, 50490 flow. Second operand 24 states and 1589 transitions. [2023-11-17 16:16:39,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1145 places, 2027 transitions, 55982 flow Received shutdown request... [2023-11-17 16:16:40,615 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:16:40,621 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 16:16:40,632 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 16:16:40,632 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:16:40,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:16:40,820 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-11-17 16:16:40,823 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:16:40,823 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:16:40,823 INFO L445 BasicCegarLoop]: Path program histogram: [76, 1, 1, 1, 1, 1] [2023-11-17 16:16:40,826 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:16:40,826 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:16:40,828 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:16:40 BasicIcfg [2023-11-17 16:16:40,828 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:16:40,828 INFO L158 Benchmark]: Toolchain (without parser) took 496337.10ms. Allocated memory was 255.9MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 206.7MB in the beginning and 2.5GB in the end (delta: -2.3GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. [2023-11-17 16:16:40,829 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 135.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:16:40,829 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.53ms. Allocated memory is still 255.9MB. Free memory was 206.2MB in the beginning and 194.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:16:40,829 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.54ms. Allocated memory is still 255.9MB. Free memory was 194.7MB in the beginning and 192.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:16:40,829 INFO L158 Benchmark]: Boogie Preprocessor took 26.05ms. Allocated memory is still 255.9MB. Free memory was 192.6MB in the beginning and 191.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:16:40,829 INFO L158 Benchmark]: RCFGBuilder took 647.19ms. Allocated memory is still 255.9MB. Free memory was 191.0MB in the beginning and 160.6MB in the end (delta: 30.4MB). Peak memory consumption was 30.4MB. Max. memory is 8.0GB. [2023-11-17 16:16:40,829 INFO L158 Benchmark]: TraceAbstraction took 495325.62ms. Allocated memory was 255.9MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 159.5MB in the beginning and 2.5GB in the end (delta: -2.3GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-11-17 16:16:40,830 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 135.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 274.53ms. Allocated memory is still 255.9MB. Free memory was 206.2MB in the beginning and 194.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 53.54ms. Allocated memory is still 255.9MB. Free memory was 194.7MB in the beginning and 192.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.05ms. Allocated memory is still 255.9MB. Free memory was 192.6MB in the beginning and 191.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 647.19ms. Allocated memory is still 255.9MB. Free memory was 191.0MB in the beginning and 160.6MB in the end (delta: 30.4MB). Peak memory consumption was 30.4MB. Max. memory is 8.0GB. * TraceAbstraction took 495325.62ms. Allocated memory was 255.9MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 159.5MB in the beginning and 2.5GB in the end (delta: -2.3GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 107 PlacesBefore, 21 PlacesAfterwards, 109 TransitionsBefore, 17 TransitionsAfterwards, 648 CoEnabledTransitionPairs, 7 FixpointIterations, 67 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 111 TotalNumberOfCompositions, 693 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 681, independent: 671, independent conditional: 0, independent unconditional: 671, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 458, independent: 453, independent conditional: 0, independent unconditional: 453, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 458, independent: 453, independent conditional: 0, independent unconditional: 453, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 20, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 681, independent: 218, independent conditional: 0, independent unconditional: 218, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 458, unknown conditional: 0, unknown unconditional: 458] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 136 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: 495.2s, OverallIterations: 81, TraceHistogramMax: 3, PathProgramHistogramMax: 76, EmptinessCheckTime: 0.0s, AutomataDifference: 372.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6199 SdHoareTripleChecker+Valid, 39.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6199 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 33.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2274 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1772 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 76837 IncrementalHoareTripleChecker+Invalid, 80883 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1772 mSolverCounterUnsat, 0 mSDtfsCounter, 76837 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5260 GetRequests, 1845 SyntacticMatches, 41 SemanticMatches, 3374 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 46290 ImplicationChecksByTransitivity, 72.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50490occurred in iteration=80, InterpolantAutomatonStates: 2007, 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: 1.2s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 90.8s InterpolantComputationTime, 3370 NumberOfCodeBlocks, 3370 NumberOfCodeBlocksAsserted, 263 NumberOfCheckSat, 4796 ConstructedInterpolants, 76 QuantifiedInterpolants, 60978 SizeOfPredicates, 857 NumberOfNonLiveVariables, 16215 ConjunctsInSsa, 3477 ConjunctsInUnsatCore, 237 InterpolantComputations, 5 PerfectInterpolantSequences, 480/3137 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