/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 03:12:52,800 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 03:12:52,850 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-VariableLbe.epf [2023-08-24 03:12:52,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 03:12:52,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 03:12:52,874 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 03:12:52,875 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 03:12:52,875 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 03:12:52,876 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 03:12:52,876 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 03:12:52,876 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 03:12:52,877 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 03:12:52,877 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 03:12:52,877 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 03:12:52,878 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 03:12:52,878 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 03:12:52,878 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 03:12:52,879 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 03:12:52,879 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 03:12:52,879 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 03:12:52,880 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 03:12:52,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 03:12:52,882 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 03:12:52,882 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 03:12:52,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 03:12:52,883 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 03:12:52,883 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 03:12:52,883 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:12:52,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 03:12:52,884 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 03:12:52,885 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 03:12:52,885 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 03:12:52,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 03:12:52,886 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 03:12:52,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 03:12:52,886 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 03:12:53,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 03:12:53,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 03:12:53,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 03:12:53,270 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 03:12:53,270 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 03:12:53,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2023-08-24 03:12:54,429 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 03:12:54,657 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 03:12:54,658 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2023-08-24 03:12:54,664 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f08d3d2/7a68cc30448f4776ac325b198a4d073e/FLAG4d50eabfe [2023-08-24 03:12:54,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f08d3d2/7a68cc30448f4776ac325b198a4d073e [2023-08-24 03:12:54,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 03:12:54,679 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 03:12:54,680 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 03:12:54,680 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 03:12:54,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 03:12:54,684 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a9b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54, skipping insertion in model container [2023-08-24 03:12:54,685 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,707 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 03:12:54,872 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-more-sum-array-hom.wvr.c[2396,2409] [2023-08-24 03:12:54,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:12:54,889 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 03:12:54,907 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-more-sum-array-hom.wvr.c[2396,2409] [2023-08-24 03:12:54,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:12:54,923 INFO L206 MainTranslator]: Completed translation [2023-08-24 03:12:54,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54 WrapperNode [2023-08-24 03:12:54,924 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 03:12:54,925 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 03:12:54,925 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 03:12:54,925 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 03:12:54,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,937 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,955 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2023-08-24 03:12:54,955 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 03:12:54,956 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 03:12:54,956 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 03:12:54,956 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 03:12:54,964 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,967 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,967 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,979 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,982 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,984 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,985 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,987 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 03:12:54,988 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 03:12:54,988 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 03:12:54,989 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 03:12:54,989 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (1/1) ... [2023-08-24 03:12:54,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:12:55,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:12:55,017 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) [2023-08-24 03:12:55,029 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 [2023-08-24 03:12:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 03:12:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 03:12:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 03:12:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 03:12:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 03:12:55,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 03:12:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 03:12:55,055 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 03:12:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 03:12:55,055 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 03:12:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 03:12:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 03:12:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 03:12:55,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 03:12:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 03:12:55,057 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 03:12:55,144 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 03:12:55,147 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 03:12:55,437 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 03:12:55,445 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 03:12:55,445 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 03:12:55,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:12:55 BoogieIcfgContainer [2023-08-24 03:12:55,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 03:12:55,449 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 03:12:55,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 03:12:55,452 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 03:12:55,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:12:54" (1/3) ... [2023-08-24 03:12:55,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157fb98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:12:55, skipping insertion in model container [2023-08-24 03:12:55,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:12:54" (2/3) ... [2023-08-24 03:12:55,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157fb98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:12:55, skipping insertion in model container [2023-08-24 03:12:55,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:12:55" (3/3) ... [2023-08-24 03:12:55,455 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2023-08-24 03:12:55,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 03:12:55,472 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 03:12:55,472 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 03:12:55,583 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 03:12:55,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 155 transitions, 334 flow [2023-08-24 03:12:55,748 INFO L124 PetriNetUnfolderBase]: 12/152 cut-off events. [2023-08-24 03:12:55,750 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 03:12:55,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 152 events. 12/152 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2023-08-24 03:12:55,756 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 155 transitions, 334 flow [2023-08-24 03:12:55,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 302 flow [2023-08-24 03:12:55,768 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 03:12:55,786 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 142 transitions, 302 flow [2023-08-24 03:12:55,790 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 142 transitions, 302 flow [2023-08-24 03:12:55,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 302 flow [2023-08-24 03:12:55,846 INFO L124 PetriNetUnfolderBase]: 12/142 cut-off events. [2023-08-24 03:12:55,846 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 03:12:55,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 12/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 113 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2023-08-24 03:12:55,851 INFO L119 LiptonReduction]: Number of co-enabled transitions 1950 [2023-08-24 03:13:00,104 INFO L134 LiptonReduction]: Checked pairs total: 2032 [2023-08-24 03:13:00,105 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-24 03:13:00,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 03:13:00,122 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=LoopsAndPotentialCycles, 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;@6cb1b7bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 03:13:00,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 03:13:00,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 03:13:00,126 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-08-24 03:13:00,126 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 03:13:00,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:00,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:00,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:00,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash -843473003, now seen corresponding path program 1 times [2023-08-24 03:13:00,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:00,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522723400] [2023-08-24 03:13:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:00,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:00,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:00,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522723400] [2023-08-24 03:13:00,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522723400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:13:00,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:13:00,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 03:13:00,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850251929] [2023-08-24 03:13:00,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:13:00,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 03:13:00,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 03:13:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 03:13:00,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 294 [2023-08-24 03:13:00,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:00,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:00,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 294 [2023-08-24 03:13:00,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:00,947 INFO L124 PetriNetUnfolderBase]: 360/508 cut-off events. [2023-08-24 03:13:00,948 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-24 03:13:00,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1608 event pairs, 39 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-08-24 03:13:00,956 INFO L140 encePairwiseOnDemand]: 289/294 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2023-08-24 03:13:00,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2023-08-24 03:13:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 03:13:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 03:13:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2023-08-24 03:13:00,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954648526077097 [2023-08-24 03:13:00,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2023-08-24 03:13:00,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2023-08-24 03:13:00,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:00,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2023-08-24 03:13:00,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:00,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:00,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,000 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 437 transitions. [2023-08-24 03:13:01,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2023-08-24 03:13:01,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 03:13:01,005 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-08-24 03:13:01,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 03:13:01,010 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-24 03:13:01,010 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-08-24 03:13:01,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:01,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:01,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 03:13:01,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:01,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:01,020 INFO L85 PathProgramCache]: Analyzing trace with hash 137741107, now seen corresponding path program 1 times [2023-08-24 03:13:01,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:01,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926818519] [2023-08-24 03:13:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:01,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:01,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:01,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926818519] [2023-08-24 03:13:01,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926818519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:13:01,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:13:01,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 03:13:01,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361513126] [2023-08-24 03:13:01,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:13:01,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:13:01,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:01,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:13:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 03:13:01,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 294 [2023-08-24 03:13:01,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:01,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 294 [2023-08-24 03:13:01,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:01,305 INFO L124 PetriNetUnfolderBase]: 615/925 cut-off events. [2023-08-24 03:13:01,305 INFO L125 PetriNetUnfolderBase]: For 258/261 co-relation queries the response was YES. [2023-08-24 03:13:01,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 925 events. 615/925 cut-off events. For 258/261 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3911 event pairs, 281 based on Foata normal form. 34/954 useless extension candidates. Maximal degree in co-relation 490. Up to 484 conditions per place. [2023-08-24 03:13:01,311 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 53 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-08-24 03:13:01,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2023-08-24 03:13:01,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:13:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:13:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2023-08-24 03:13:01,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653061224489797 [2023-08-24 03:13:01,314 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2023-08-24 03:13:01,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2023-08-24 03:13:01,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:01,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2023-08-24 03:13:01,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 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) [2023-08-24 03:13:01,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,320 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,320 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 627 transitions. [2023-08-24 03:13:01,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2023-08-24 03:13:01,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 03:13:01,322 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 114 flow [2023-08-24 03:13:01,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-24 03:13:01,323 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-24 03:13:01,323 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 114 flow [2023-08-24 03:13:01,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:01,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:01,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 03:13:01,324 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:01,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:01,325 INFO L85 PathProgramCache]: Analyzing trace with hash -865766179, now seen corresponding path program 1 times [2023-08-24 03:13:01,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:01,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529403031] [2023-08-24 03:13:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:01,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:01,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:01,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529403031] [2023-08-24 03:13:01,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529403031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:13:01,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:13:01,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 03:13:01,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505899013] [2023-08-24 03:13:01,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:13:01,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:13:01,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:01,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:13:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 03:13:01,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 294 [2023-08-24 03:13:01,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:01,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 294 [2023-08-24 03:13:01,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:01,625 INFO L124 PetriNetUnfolderBase]: 567/867 cut-off events. [2023-08-24 03:13:01,625 INFO L125 PetriNetUnfolderBase]: For 554/626 co-relation queries the response was YES. [2023-08-24 03:13:01,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 867 events. 567/867 cut-off events. For 554/626 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3485 event pairs, 328 based on Foata normal form. 106/971 useless extension candidates. Maximal degree in co-relation 1470. Up to 568 conditions per place. [2023-08-24 03:13:01,630 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 52 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-08-24 03:13:01,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 59 transitions, 306 flow [2023-08-24 03:13:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:13:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:13:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 603 transitions. [2023-08-24 03:13:01,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41020408163265304 [2023-08-24 03:13:01,633 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 603 transitions. [2023-08-24 03:13:01,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 603 transitions. [2023-08-24 03:13:01,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:01,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 603 transitions. [2023-08-24 03:13:01,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.6) internal successors, (603), 5 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) [2023-08-24 03:13:01,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,638 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,638 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 114 flow. Second operand 5 states and 603 transitions. [2023-08-24 03:13:01,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 59 transitions, 306 flow [2023-08-24 03:13:01,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 59 transitions, 302 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 03:13:01,642 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 137 flow [2023-08-24 03:13:01,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-24 03:13:01,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-24 03:13:01,645 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 137 flow [2023-08-24 03:13:01,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:01,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:01,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 03:13:01,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:01,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:01,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1410865083, now seen corresponding path program 1 times [2023-08-24 03:13:01,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:01,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995090666] [2023-08-24 03:13:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:01,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:01,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995090666] [2023-08-24 03:13:01,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995090666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:13:01,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:13:01,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 03:13:01,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62055790] [2023-08-24 03:13:01,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:13:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:13:01,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:01,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:13:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 03:13:01,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 294 [2023-08-24 03:13:01,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:01,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 294 [2023-08-24 03:13:01,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:01,900 INFO L124 PetriNetUnfolderBase]: 417/635 cut-off events. [2023-08-24 03:13:01,900 INFO L125 PetriNetUnfolderBase]: For 740/812 co-relation queries the response was YES. [2023-08-24 03:13:01,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1853 conditions, 635 events. 417/635 cut-off events. For 740/812 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2482 event pairs, 221 based on Foata normal form. 86/719 useless extension candidates. Maximal degree in co-relation 1511. Up to 514 conditions per place. [2023-08-24 03:13:01,904 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 24 selfloop transitions, 2 changer transitions 25/53 dead transitions. [2023-08-24 03:13:01,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 291 flow [2023-08-24 03:13:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:13:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:13:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 602 transitions. [2023-08-24 03:13:01,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2023-08-24 03:13:01,906 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 602 transitions. [2023-08-24 03:13:01,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 602 transitions. [2023-08-24 03:13:01,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:01,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 602 transitions. [2023-08-24 03:13:01,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,912 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,912 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 137 flow. Second operand 5 states and 602 transitions. [2023-08-24 03:13:01,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 291 flow [2023-08-24 03:13:01,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 03:13:01,915 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 110 flow [2023-08-24 03:13:01,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-24 03:13:01,916 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-08-24 03:13:01,916 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 110 flow [2023-08-24 03:13:01,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:01,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:01,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:01,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 03:13:01,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:01,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash -496079228, now seen corresponding path program 1 times [2023-08-24 03:13:01,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:01,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138540840] [2023-08-24 03:13:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:01,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:02,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:02,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138540840] [2023-08-24 03:13:02,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138540840] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:02,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569376272] [2023-08-24 03:13:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:02,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:02,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:02,033 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) [2023-08-24 03:13:02,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 03:13:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:02,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:13:02,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:02,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:02,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569376272] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:02,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:13:02,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-08-24 03:13:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712223509] [2023-08-24 03:13:02,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:13:02,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 03:13:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 03:13:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-24 03:13:02,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:13:02,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:02,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:02,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:13:02,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:02,547 INFO L124 PetriNetUnfolderBase]: 544/799 cut-off events. [2023-08-24 03:13:02,547 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2023-08-24 03:13:02,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 799 events. 544/799 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3057 event pairs, 139 based on Foata normal form. 16/814 useless extension candidates. Maximal degree in co-relation 2433. Up to 410 conditions per place. [2023-08-24 03:13:02,554 INFO L140 encePairwiseOnDemand]: 286/294 looper letters, 58 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2023-08-24 03:13:02,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 68 transitions, 396 flow [2023-08-24 03:13:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 03:13:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 03:13:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 801 transitions. [2023-08-24 03:13:02,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892128279883382 [2023-08-24 03:13:02,557 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 801 transitions. [2023-08-24 03:13:02,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 801 transitions. [2023-08-24 03:13:02,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:02,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 801 transitions. [2023-08-24 03:13:02,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 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) [2023-08-24 03:13:02,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:13:02,563 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:13:02,563 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 110 flow. Second operand 7 states and 801 transitions. [2023-08-24 03:13:02,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 68 transitions, 396 flow [2023-08-24 03:13:02,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 68 transitions, 334 flow, removed 29 selfloop flow, removed 8 redundant places. [2023-08-24 03:13:02,569 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 141 flow [2023-08-24 03:13:02,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=141, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-08-24 03:13:02,570 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-08-24 03:13:02,570 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 141 flow [2023-08-24 03:13:02,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:02,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:02,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:02,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:02,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:02,776 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:02,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1751924946, now seen corresponding path program 2 times [2023-08-24 03:13:02,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:02,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298939881] [2023-08-24 03:13:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:02,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298939881] [2023-08-24 03:13:02,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298939881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467798250] [2023-08-24 03:13:02,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:13:02,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:02,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:02,905 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) [2023-08-24 03:13:02,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 03:13:03,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:13:03,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:03,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:13:03,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:03,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:03,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467798250] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:03,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:13:03,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-08-24 03:13:03,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889147409] [2023-08-24 03:13:03,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:13:03,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 03:13:03,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 03:13:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-24 03:13:03,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:13:03,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 141 flow. Second operand has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:03,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:03,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:13:03,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:03,395 INFO L124 PetriNetUnfolderBase]: 736/1083 cut-off events. [2023-08-24 03:13:03,396 INFO L125 PetriNetUnfolderBase]: For 1058/1058 co-relation queries the response was YES. [2023-08-24 03:13:03,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3300 conditions, 1083 events. 736/1083 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4337 event pairs, 221 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 3278. Up to 648 conditions per place. [2023-08-24 03:13:03,403 INFO L140 encePairwiseOnDemand]: 286/294 looper letters, 60 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-08-24 03:13:03,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 73 transitions, 447 flow [2023-08-24 03:13:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 03:13:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 03:13:03,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 797 transitions. [2023-08-24 03:13:03,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872691933916424 [2023-08-24 03:13:03,407 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 797 transitions. [2023-08-24 03:13:03,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 797 transitions. [2023-08-24 03:13:03,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:03,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 797 transitions. [2023-08-24 03:13:03,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:03,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:13:03,413 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:13:03,413 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 141 flow. Second operand 7 states and 797 transitions. [2023-08-24 03:13:03,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 73 transitions, 447 flow [2023-08-24 03:13:03,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 412 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-24 03:13:03,417 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 198 flow [2023-08-24 03:13:03,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-24 03:13:03,418 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-08-24 03:13:03,418 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 198 flow [2023-08-24 03:13:03,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:03,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:03,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:03,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:03,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 03:13:03,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:03,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash 599876626, now seen corresponding path program 3 times [2023-08-24 03:13:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:03,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444225259] [2023-08-24 03:13:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:03,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:03,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:03,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444225259] [2023-08-24 03:13:03,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444225259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:03,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225831850] [2023-08-24 03:13:03,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:13:03,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:03,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:03,735 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) [2023-08-24 03:13:03,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 03:13:03,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:13:03,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:03,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:13:03,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:03,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:03,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225831850] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:03,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:13:03,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-08-24 03:13:03,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235704649] [2023-08-24 03:13:03,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:13:03,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 03:13:03,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:03,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 03:13:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-24 03:13:03,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:13:03,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:03,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:03,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:13:03,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:04,183 INFO L124 PetriNetUnfolderBase]: 840/1246 cut-off events. [2023-08-24 03:13:04,184 INFO L125 PetriNetUnfolderBase]: For 2290/2290 co-relation queries the response was YES. [2023-08-24 03:13:04,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 1246 events. 840/1246 cut-off events. For 2290/2290 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5152 event pairs, 307 based on Foata normal form. 16/1259 useless extension candidates. Maximal degree in co-relation 4355. Up to 903 conditions per place. [2023-08-24 03:13:04,192 INFO L140 encePairwiseOnDemand]: 286/294 looper letters, 58 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2023-08-24 03:13:04,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 527 flow [2023-08-24 03:13:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 03:13:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 03:13:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 798 transitions. [2023-08-24 03:13:04,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2023-08-24 03:13:04,195 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 798 transitions. [2023-08-24 03:13:04,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 798 transitions. [2023-08-24 03:13:04,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:04,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 798 transitions. [2023-08-24 03:13:04,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:04,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:13:04,201 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:13:04,201 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 198 flow. Second operand 7 states and 798 transitions. [2023-08-24 03:13:04,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 527 flow [2023-08-24 03:13:04,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 76 transitions, 486 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-24 03:13:04,206 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 295 flow [2023-08-24 03:13:04,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-24 03:13:04,207 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2023-08-24 03:13:04,207 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 295 flow [2023-08-24 03:13:04,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:04,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:04,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:04,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 03:13:04,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:04,412 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:04,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:04,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1290624674, now seen corresponding path program 4 times [2023-08-24 03:13:04,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:04,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868399303] [2023-08-24 03:13:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:04,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:04,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868399303] [2023-08-24 03:13:04,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868399303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591992166] [2023-08-24 03:13:04,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:13:04,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:04,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:04,534 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) [2023-08-24 03:13:04,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 03:13:04,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:13:04,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:04,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 03:13:04,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:04,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:04,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591992166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:04,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:04,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-08-24 03:13:04,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864489952] [2023-08-24 03:13:04,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:04,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 03:13:04,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 03:13:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-24 03:13:04,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 03:13:04,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 295 flow. Second operand has 13 states, 13 states have (on average 103.76923076923077) internal successors, (1349), 13 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:04,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:04,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 03:13:04,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:05,231 INFO L124 PetriNetUnfolderBase]: 869/1312 cut-off events. [2023-08-24 03:13:05,231 INFO L125 PetriNetUnfolderBase]: For 3495/3495 co-relation queries the response was YES. [2023-08-24 03:13:05,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5094 conditions, 1312 events. 869/1312 cut-off events. For 3495/3495 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5306 event pairs, 166 based on Foata normal form. 18/1329 useless extension candidates. Maximal degree in co-relation 5066. Up to 461 conditions per place. [2023-08-24 03:13:05,241 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 105 selfloop transitions, 70 changer transitions 0/175 dead transitions. [2023-08-24 03:13:05,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 175 transitions, 1382 flow [2023-08-24 03:13:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 03:13:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 03:13:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1839 transitions. [2023-08-24 03:13:05,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3679471788715486 [2023-08-24 03:13:05,248 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1839 transitions. [2023-08-24 03:13:05,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1839 transitions. [2023-08-24 03:13:05,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:05,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1839 transitions. [2023-08-24 03:13:05,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 108.17647058823529) internal successors, (1839), 17 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:05,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:05,262 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:05,262 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 295 flow. Second operand 17 states and 1839 transitions. [2023-08-24 03:13:05,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 175 transitions, 1382 flow [2023-08-24 03:13:05,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 175 transitions, 1262 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-24 03:13:05,272 INFO L231 Difference]: Finished difference. Result has 63 places, 100 transitions, 830 flow [2023-08-24 03:13:05,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=830, PETRI_PLACES=63, PETRI_TRANSITIONS=100} [2023-08-24 03:13:05,275 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2023-08-24 03:13:05,275 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 100 transitions, 830 flow [2023-08-24 03:13:05,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 103.76923076923077) internal successors, (1349), 13 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:05,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:05,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:05,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:05,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:05,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:05,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1330225794, now seen corresponding path program 5 times [2023-08-24 03:13:05,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:05,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864496928] [2023-08-24 03:13:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:05,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:05,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:05,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864496928] [2023-08-24 03:13:05,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864496928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:05,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318621202] [2023-08-24 03:13:05,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:13:05,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:05,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:05,625 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) [2023-08-24 03:13:05,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 03:13:05,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:13:05,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:05,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 03:13:05,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:05,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:05,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318621202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:05,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:05,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 03:13:05,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041312730] [2023-08-24 03:13:05,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:05,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 03:13:05,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:05,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 03:13:05,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-08-24 03:13:05,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 03:13:05,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 100 transitions, 830 flow. Second operand has 15 states, 15 states have (on average 104.0) internal successors, (1560), 15 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:05,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:05,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 03:13:05,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:06,339 INFO L124 PetriNetUnfolderBase]: 850/1272 cut-off events. [2023-08-24 03:13:06,339 INFO L125 PetriNetUnfolderBase]: For 3699/3699 co-relation queries the response was YES. [2023-08-24 03:13:06,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5453 conditions, 1272 events. 850/1272 cut-off events. For 3699/3699 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4982 event pairs, 208 based on Foata normal form. 14/1285 useless extension candidates. Maximal degree in co-relation 5423. Up to 624 conditions per place. [2023-08-24 03:13:06,351 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 87 selfloop transitions, 74 changer transitions 0/161 dead transitions. [2023-08-24 03:13:06,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 161 transitions, 1403 flow [2023-08-24 03:13:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 03:13:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 03:13:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1407 transitions. [2023-08-24 03:13:06,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36813186813186816 [2023-08-24 03:13:06,355 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1407 transitions. [2023-08-24 03:13:06,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1407 transitions. [2023-08-24 03:13:06,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:06,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1407 transitions. [2023-08-24 03:13:06,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 108.23076923076923) internal successors, (1407), 13 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:06,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:06,366 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:06,366 INFO L175 Difference]: Start difference. First operand has 63 places, 100 transitions, 830 flow. Second operand 13 states and 1407 transitions. [2023-08-24 03:13:06,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 161 transitions, 1403 flow [2023-08-24 03:13:06,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 161 transitions, 1268 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-08-24 03:13:06,380 INFO L231 Difference]: Finished difference. Result has 73 places, 118 transitions, 981 flow [2023-08-24 03:13:06,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=981, PETRI_PLACES=73, PETRI_TRANSITIONS=118} [2023-08-24 03:13:06,381 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-08-24 03:13:06,381 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 118 transitions, 981 flow [2023-08-24 03:13:06,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 104.0) internal successors, (1560), 15 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:06,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:06,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:06,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:06,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:06,587 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:06,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:06,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1057462672, now seen corresponding path program 6 times [2023-08-24 03:13:06,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:06,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277431812] [2023-08-24 03:13:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:06,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:06,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:06,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277431812] [2023-08-24 03:13:06,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277431812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:06,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178372742] [2023-08-24 03:13:06,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:13:06,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:06,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:06,686 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) [2023-08-24 03:13:06,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 03:13:06,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:13:06,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:06,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:13:06,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:06,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:06,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178372742] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:06,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:13:06,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-08-24 03:13:06,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53879867] [2023-08-24 03:13:06,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:13:06,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 03:13:06,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 03:13:06,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 03:13:06,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:13:06,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 118 transitions, 981 flow. Second operand has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:06,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:06,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:13:06,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:07,174 INFO L124 PetriNetUnfolderBase]: 809/1205 cut-off events. [2023-08-24 03:13:07,174 INFO L125 PetriNetUnfolderBase]: For 3910/3910 co-relation queries the response was YES. [2023-08-24 03:13:07,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5353 conditions, 1205 events. 809/1205 cut-off events. For 3910/3910 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4736 event pairs, 171 based on Foata normal form. 14/1216 useless extension candidates. Maximal degree in co-relation 5320. Up to 649 conditions per place. [2023-08-24 03:13:07,184 INFO L140 encePairwiseOnDemand]: 286/294 looper letters, 78 selfloop transitions, 50 changer transitions 0/138 dead transitions. [2023-08-24 03:13:07,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 138 transitions, 1277 flow [2023-08-24 03:13:07,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 03:13:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 03:13:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 798 transitions. [2023-08-24 03:13:07,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2023-08-24 03:13:07,187 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 798 transitions. [2023-08-24 03:13:07,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 798 transitions. [2023-08-24 03:13:07,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:07,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 798 transitions. [2023-08-24 03:13:07,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:07,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:13:07,193 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:13:07,193 INFO L175 Difference]: Start difference. First operand has 73 places, 118 transitions, 981 flow. Second operand 7 states and 798 transitions. [2023-08-24 03:13:07,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 138 transitions, 1277 flow [2023-08-24 03:13:07,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 138 transitions, 1196 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-24 03:13:07,208 INFO L231 Difference]: Finished difference. Result has 72 places, 114 transitions, 964 flow [2023-08-24 03:13:07,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=964, PETRI_PLACES=72, PETRI_TRANSITIONS=114} [2023-08-24 03:13:07,209 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-08-24 03:13:07,209 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 114 transitions, 964 flow [2023-08-24 03:13:07,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:07,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:07,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:07,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:07,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:07,419 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:07,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash 560514790, now seen corresponding path program 1 times [2023-08-24 03:13:07,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:07,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731866343] [2023-08-24 03:13:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:07,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:07,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:07,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731866343] [2023-08-24 03:13:07,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731866343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:07,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263038601] [2023-08-24 03:13:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:07,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:07,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:07,531 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) [2023-08-24 03:13:07,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 03:13:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:07,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 03:13:07,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:07,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:07,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263038601] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:07,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:13:07,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 03:13:07,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417924668] [2023-08-24 03:13:07,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:13:07,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:13:07,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:07,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:13:07,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 03:13:07,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 294 [2023-08-24 03:13:07,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 114 transitions, 964 flow. Second operand has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:07,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:07,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 294 [2023-08-24 03:13:07,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:07,843 INFO L124 PetriNetUnfolderBase]: 743/1087 cut-off events. [2023-08-24 03:13:07,844 INFO L125 PetriNetUnfolderBase]: For 3839/3997 co-relation queries the response was YES. [2023-08-24 03:13:07,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5051 conditions, 1087 events. 743/1087 cut-off events. For 3839/3997 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4441 event pairs, 181 based on Foata normal form. 169/1188 useless extension candidates. Maximal degree in co-relation 5017. Up to 842 conditions per place. [2023-08-24 03:13:07,852 INFO L140 encePairwiseOnDemand]: 289/294 looper letters, 106 selfloop transitions, 14 changer transitions 0/132 dead transitions. [2023-08-24 03:13:07,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 132 transitions, 1323 flow [2023-08-24 03:13:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:13:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:13:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 609 transitions. [2023-08-24 03:13:07,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2023-08-24 03:13:07,854 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 609 transitions. [2023-08-24 03:13:07,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 609 transitions. [2023-08-24 03:13:07,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:07,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 609 transitions. [2023-08-24 03:13:07,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:07,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:07,858 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:07,858 INFO L175 Difference]: Start difference. First operand has 72 places, 114 transitions, 964 flow. Second operand 5 states and 609 transitions. [2023-08-24 03:13:07,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 132 transitions, 1323 flow [2023-08-24 03:13:07,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 132 transitions, 1212 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-24 03:13:07,868 INFO L231 Difference]: Finished difference. Result has 71 places, 115 transitions, 922 flow [2023-08-24 03:13:07,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=922, PETRI_PLACES=71, PETRI_TRANSITIONS=115} [2023-08-24 03:13:07,869 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2023-08-24 03:13:07,869 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 115 transitions, 922 flow [2023-08-24 03:13:07,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:07,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:07,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:07,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:08,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:08,075 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:08,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash -930821626, now seen corresponding path program 1 times [2023-08-24 03:13:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:08,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442811904] [2023-08-24 03:13:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:08,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:08,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:08,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442811904] [2023-08-24 03:13:08,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442811904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:08,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980812656] [2023-08-24 03:13:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:08,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:08,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:08,837 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) [2023-08-24 03:13:08,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 03:13:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:08,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 03:13:08,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:13:09,235 INFO L351 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 14 treesize of output 16 [2023-08-24 03:13:09,349 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:13:09,351 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:09,351 INFO L351 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 10 [2023-08-24 03:13:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:09,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:09,662 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:09,662 INFO L351 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 64 treesize of output 48 [2023-08-24 03:13:09,669 INFO L351 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 22 treesize of output 16 [2023-08-24 03:13:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:10,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980812656] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:10,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:10,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-08-24 03:13:10,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776331912] [2023-08-24 03:13:10,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:10,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 03:13:10,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:10,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 03:13:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=554, Unknown=1, NotChecked=0, Total=650 [2023-08-24 03:13:10,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 03:13:10,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 115 transitions, 922 flow. Second operand has 26 states, 26 states have (on average 84.3076923076923) internal successors, (2192), 26 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:10,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:10,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 03:13:10,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:11,905 INFO L124 PetriNetUnfolderBase]: 1393/2046 cut-off events. [2023-08-24 03:13:11,905 INFO L125 PetriNetUnfolderBase]: For 5989/6161 co-relation queries the response was YES. [2023-08-24 03:13:11,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9530 conditions, 2046 events. 1393/2046 cut-off events. For 5989/6161 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8971 event pairs, 156 based on Foata normal form. 138/2180 useless extension candidates. Maximal degree in co-relation 8332. Up to 1232 conditions per place. [2023-08-24 03:13:11,928 INFO L140 encePairwiseOnDemand]: 283/294 looper letters, 219 selfloop transitions, 140 changer transitions 7/372 dead transitions. [2023-08-24 03:13:11,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 372 transitions, 3576 flow [2023-08-24 03:13:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 03:13:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 03:13:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1205 transitions. [2023-08-24 03:13:11,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31527995813710097 [2023-08-24 03:13:11,932 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1205 transitions. [2023-08-24 03:13:11,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1205 transitions. [2023-08-24 03:13:11,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:11,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1205 transitions. [2023-08-24 03:13:11,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 92.6923076923077) internal successors, (1205), 13 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:11,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:11,940 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:11,940 INFO L175 Difference]: Start difference. First operand has 71 places, 115 transitions, 922 flow. Second operand 13 states and 1205 transitions. [2023-08-24 03:13:11,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 372 transitions, 3576 flow [2023-08-24 03:13:11,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 372 transitions, 3539 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 03:13:11,964 INFO L231 Difference]: Finished difference. Result has 86 places, 228 transitions, 2335 flow [2023-08-24 03:13:11,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2335, PETRI_PLACES=86, PETRI_TRANSITIONS=228} [2023-08-24 03:13:11,966 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2023-08-24 03:13:11,966 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 228 transitions, 2335 flow [2023-08-24 03:13:11,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.3076923076923) internal successors, (2192), 26 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:11,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:11,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:11,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:12,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 03:13:12,184 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:12,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1482607534, now seen corresponding path program 1 times [2023-08-24 03:13:12,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:12,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445417559] [2023-08-24 03:13:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:12,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:12,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445417559] [2023-08-24 03:13:12,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445417559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99257848] [2023-08-24 03:13:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:12,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:12,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:12,825 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) [2023-08-24 03:13:12,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 03:13:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:12,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:13:12,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:12,964 INFO L351 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 11 treesize of output 7 [2023-08-24 03:13:13,002 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:13,051 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:13,083 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:13,154 INFO L351 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 22 treesize of output 10 [2023-08-24 03:13:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:13,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99257848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:13,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:13,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 17 [2023-08-24 03:13:13,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510758906] [2023-08-24 03:13:13,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:13,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 03:13:13,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:13,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 03:13:13,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-24 03:13:13,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:13:13,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 228 transitions, 2335 flow. Second operand has 19 states, 19 states have (on average 90.6842105263158) internal successors, (1723), 19 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:13,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:13,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:13:13,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:13,948 INFO L124 PetriNetUnfolderBase]: 2135/3106 cut-off events. [2023-08-24 03:13:13,948 INFO L125 PetriNetUnfolderBase]: For 14228/14434 co-relation queries the response was YES. [2023-08-24 03:13:13,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16820 conditions, 3106 events. 2135/3106 cut-off events. For 14228/14434 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 14495 event pairs, 207 based on Foata normal form. 181/3223 useless extension candidates. Maximal degree in co-relation 16408. Up to 2044 conditions per place. [2023-08-24 03:13:13,971 INFO L140 encePairwiseOnDemand]: 283/294 looper letters, 222 selfloop transitions, 194 changer transitions 1/429 dead transitions. [2023-08-24 03:13:13,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 429 transitions, 5039 flow [2023-08-24 03:13:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:13:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:13:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 792 transitions. [2023-08-24 03:13:13,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2023-08-24 03:13:13,974 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 792 transitions. [2023-08-24 03:13:13,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 792 transitions. [2023-08-24 03:13:13,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:13,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 792 transitions. [2023-08-24 03:13:13,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:13,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:13,979 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:13,979 INFO L175 Difference]: Start difference. First operand has 86 places, 228 transitions, 2335 flow. Second operand 8 states and 792 transitions. [2023-08-24 03:13:13,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 429 transitions, 5039 flow [2023-08-24 03:13:14,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 429 transitions, 4811 flow, removed 113 selfloop flow, removed 1 redundant places. [2023-08-24 03:13:14,027 INFO L231 Difference]: Finished difference. Result has 96 places, 337 transitions, 3972 flow [2023-08-24 03:13:14,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3972, PETRI_PLACES=96, PETRI_TRANSITIONS=337} [2023-08-24 03:13:14,028 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-08-24 03:13:14,028 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 337 transitions, 3972 flow [2023-08-24 03:13:14,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.6842105263158) internal successors, (1723), 19 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:14,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:14,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:14,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 03:13:14,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 03:13:14,236 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:14,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:14,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1084770934, now seen corresponding path program 2 times [2023-08-24 03:13:14,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:14,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805814946] [2023-08-24 03:13:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:14,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:14,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:14,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805814946] [2023-08-24 03:13:14,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805814946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:14,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098283525] [2023-08-24 03:13:14,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:13:14,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:14,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:14,948 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) [2023-08-24 03:13:14,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 03:13:15,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:13:15,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:15,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 03:13:15,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:15,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:13:15,235 INFO L351 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 14 treesize of output 16 [2023-08-24 03:13:15,285 INFO L351 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 22 treesize of output 10 [2023-08-24 03:13:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:15,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:15,399 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_527 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_527) c_~A~0.base) c_~A~0.offset)) 4294967296) (mod c_~sum1~0 4294967296))) is different from false [2023-08-24 03:13:15,411 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:15,412 INFO L351 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 56 treesize of output 44 [2023-08-24 03:13:15,416 INFO L351 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 18 treesize of output 16 [2023-08-24 03:13:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-24 03:13:15,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098283525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:15,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:15,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2023-08-24 03:13:15,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313744976] [2023-08-24 03:13:15,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:15,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 03:13:15,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:15,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 03:13:15,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=337, Unknown=1, NotChecked=38, Total=462 [2023-08-24 03:13:15,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:13:15,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 337 transitions, 3972 flow. Second operand has 22 states, 22 states have (on average 90.45454545454545) internal successors, (1990), 22 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:15,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:15,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:13:15,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:16,626 INFO L124 PetriNetUnfolderBase]: 2525/3674 cut-off events. [2023-08-24 03:13:16,627 INFO L125 PetriNetUnfolderBase]: For 22710/22968 co-relation queries the response was YES. [2023-08-24 03:13:16,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22025 conditions, 3674 events. 2525/3674 cut-off events. For 22710/22968 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 17713 event pairs, 226 based on Foata normal form. 227/3828 useless extension candidates. Maximal degree in co-relation 21645. Up to 2027 conditions per place. [2023-08-24 03:13:16,702 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 192 selfloop transitions, 278 changer transitions 1/483 dead transitions. [2023-08-24 03:13:16,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 483 transitions, 6338 flow [2023-08-24 03:13:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:13:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:13:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 792 transitions. [2023-08-24 03:13:16,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2023-08-24 03:13:16,705 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 792 transitions. [2023-08-24 03:13:16,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 792 transitions. [2023-08-24 03:13:16,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:16,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 792 transitions. [2023-08-24 03:13:16,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:16,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:16,711 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:16,711 INFO L175 Difference]: Start difference. First operand has 96 places, 337 transitions, 3972 flow. Second operand 8 states and 792 transitions. [2023-08-24 03:13:16,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 483 transitions, 6338 flow [2023-08-24 03:13:16,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 483 transitions, 6175 flow, removed 55 selfloop flow, removed 2 redundant places. [2023-08-24 03:13:16,792 INFO L231 Difference]: Finished difference. Result has 104 places, 397 transitions, 5437 flow [2023-08-24 03:13:16,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=3809, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5437, PETRI_PLACES=104, PETRI_TRANSITIONS=397} [2023-08-24 03:13:16,793 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2023-08-24 03:13:16,794 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 397 transitions, 5437 flow [2023-08-24 03:13:16,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 90.45454545454545) internal successors, (1990), 22 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:16,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:16,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:16,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:17,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 03:13:17,000 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:17,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1022520044, now seen corresponding path program 3 times [2023-08-24 03:13:17,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:17,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080473257] [2023-08-24 03:13:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:17,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:17,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:17,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080473257] [2023-08-24 03:13:17,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080473257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:17,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268847271] [2023-08-24 03:13:17,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:13:17,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:17,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:17,645 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) [2023-08-24 03:13:17,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 03:13:17,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:13:17,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:17,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 03:13:17,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:17,850 INFO L351 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 22 treesize of output 10 [2023-08-24 03:13:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:17,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:17,939 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:17,940 INFO L351 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 28 treesize of output 21 [2023-08-24 03:13:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:18,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268847271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:18,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:18,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 14 [2023-08-24 03:13:18,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501388618] [2023-08-24 03:13:18,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:18,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 03:13:18,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:18,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 03:13:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-08-24 03:13:18,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:13:18,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 397 transitions, 5437 flow. Second operand has 16 states, 16 states have (on average 91.1875) internal successors, (1459), 16 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:18,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:18,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:13:18,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:19,113 INFO L124 PetriNetUnfolderBase]: 2945/4241 cut-off events. [2023-08-24 03:13:19,114 INFO L125 PetriNetUnfolderBase]: For 34302/34630 co-relation queries the response was YES. [2023-08-24 03:13:19,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28662 conditions, 4241 events. 2945/4241 cut-off events. For 34302/34630 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 20613 event pairs, 403 based on Foata normal form. 297/4431 useless extension candidates. Maximal degree in co-relation 28263. Up to 3562 conditions per place. [2023-08-24 03:13:19,155 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 371 selfloop transitions, 146 changer transitions 1/530 dead transitions. [2023-08-24 03:13:19,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 530 transitions, 7992 flow [2023-08-24 03:13:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:13:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:13:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 784 transitions. [2023-08-24 03:13:19,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-24 03:13:19,159 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 784 transitions. [2023-08-24 03:13:19,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 784 transitions. [2023-08-24 03:13:19,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:19,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 784 transitions. [2023-08-24 03:13:19,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:19,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:19,164 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:19,164 INFO L175 Difference]: Start difference. First operand has 104 places, 397 transitions, 5437 flow. Second operand 8 states and 784 transitions. [2023-08-24 03:13:19,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 530 transitions, 7992 flow [2023-08-24 03:13:19,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 530 transitions, 7789 flow, removed 46 selfloop flow, removed 3 redundant places. [2023-08-24 03:13:19,305 INFO L231 Difference]: Finished difference. Result has 112 places, 471 transitions, 6836 flow [2023-08-24 03:13:19,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=5254, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6836, PETRI_PLACES=112, PETRI_TRANSITIONS=471} [2023-08-24 03:13:19,306 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2023-08-24 03:13:19,306 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 471 transitions, 6836 flow [2023-08-24 03:13:19,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.1875) internal successors, (1459), 16 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:19,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:19,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:19,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:19,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 03:13:19,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:19,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1824941946, now seen corresponding path program 2 times [2023-08-24 03:13:19,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:19,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879420195] [2023-08-24 03:13:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:19,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:20,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:20,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879420195] [2023-08-24 03:13:20,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879420195] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:20,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677581347] [2023-08-24 03:13:20,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:13:20,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:20,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:20,365 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) [2023-08-24 03:13:20,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 03:13:20,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:13:20,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:20,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 03:13:20,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:20,787 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:13:20,790 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:20,790 INFO L351 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 10 [2023-08-24 03:13:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:20,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:20,892 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:20,892 INFO L351 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 28 treesize of output 21 [2023-08-24 03:13:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:21,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677581347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:21,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:21,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 27 [2023-08-24 03:13:21,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994634326] [2023-08-24 03:13:21,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:21,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 03:13:21,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 03:13:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2023-08-24 03:13:21,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 03:13:21,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 471 transitions, 6836 flow. Second operand has 29 states, 29 states have (on average 74.37931034482759) internal successors, (2157), 29 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:21,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:21,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 03:13:21,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:22,434 INFO L124 PetriNetUnfolderBase]: 3197/4644 cut-off events. [2023-08-24 03:13:22,435 INFO L125 PetriNetUnfolderBase]: For 34952/34952 co-relation queries the response was YES. [2023-08-24 03:13:22,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31492 conditions, 4644 events. 3197/4644 cut-off events. For 34952/34952 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22216 event pairs, 498 based on Foata normal form. 1/4644 useless extension candidates. Maximal degree in co-relation 31078. Up to 4102 conditions per place. [2023-08-24 03:13:22,481 INFO L140 encePairwiseOnDemand]: 283/294 looper letters, 442 selfloop transitions, 126 changer transitions 1/569 dead transitions. [2023-08-24 03:13:22,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 569 transitions, 8983 flow [2023-08-24 03:13:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 03:13:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 03:13:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1031 transitions. [2023-08-24 03:13:22,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2697540554683412 [2023-08-24 03:13:22,484 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1031 transitions. [2023-08-24 03:13:22,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1031 transitions. [2023-08-24 03:13:22,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:22,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1031 transitions. [2023-08-24 03:13:22,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 79.3076923076923) internal successors, (1031), 13 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:22,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:22,490 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:22,490 INFO L175 Difference]: Start difference. First operand has 112 places, 471 transitions, 6836 flow. Second operand 13 states and 1031 transitions. [2023-08-24 03:13:22,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 569 transitions, 8983 flow [2023-08-24 03:13:22,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 569 transitions, 8673 flow, removed 34 selfloop flow, removed 4 redundant places. [2023-08-24 03:13:22,698 INFO L231 Difference]: Finished difference. Result has 127 places, 515 transitions, 7660 flow [2023-08-24 03:13:22,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=6566, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7660, PETRI_PLACES=127, PETRI_TRANSITIONS=515} [2023-08-24 03:13:22,700 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-08-24 03:13:22,700 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 515 transitions, 7660 flow [2023-08-24 03:13:22,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 74.37931034482759) internal successors, (2157), 29 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:22,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:22,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:22,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:22,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 03:13:22,906 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:22,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:22,907 INFO L85 PathProgramCache]: Analyzing trace with hash -385810400, now seen corresponding path program 4 times [2023-08-24 03:13:22,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:22,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950184136] [2023-08-24 03:13:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:22,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:23,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:23,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950184136] [2023-08-24 03:13:23,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950184136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:23,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98151672] [2023-08-24 03:13:23,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:13:23,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:23,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:23,249 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) [2023-08-24 03:13:23,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 03:13:23,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:13:23,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:23,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:13:23,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:23,408 INFO L351 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 11 treesize of output 7 [2023-08-24 03:13:23,445 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:23,514 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:23,555 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:23,601 INFO L351 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 22 treesize of output 10 [2023-08-24 03:13:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:23,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:23,730 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_664 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_664) c_~A~0.base))) (= (mod (+ (select .cse0 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4))) c_~sum1~0) 4294967296) (mod (+ (select .cse0 c_~A~0.offset) c_~sum3~0 c_~sum2~0) 4294967296)))) is different from false [2023-08-24 03:13:23,743 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_663 (Array Int Int)) (v_ArrVal_664 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_663) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_664) c_~A~0.base))) (= (mod (+ c_~sum1~0 (select .cse0 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) 4294967296) (mod (+ c_~sum3~0 (select .cse0 c_~A~0.offset) c_~sum2~0) 4294967296)))) is different from false [2023-08-24 03:13:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98151672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:23,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:23,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 18 [2023-08-24 03:13:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737434690] [2023-08-24 03:13:23,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:23,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 03:13:23,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:23,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 03:13:23,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=226, Unknown=2, NotChecked=66, Total=380 [2023-08-24 03:13:23,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:13:23,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 515 transitions, 7660 flow. Second operand has 20 states, 20 states have (on average 91.05) internal successors, (1821), 20 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:23,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:23,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:13:23,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:24,663 INFO L124 PetriNetUnfolderBase]: 3219/4661 cut-off events. [2023-08-24 03:13:24,663 INFO L125 PetriNetUnfolderBase]: For 44435/44824 co-relation queries the response was YES. [2023-08-24 03:13:24,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33213 conditions, 4661 events. 3219/4661 cut-off events. For 44435/44824 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23256 event pairs, 459 based on Foata normal form. 340/4881 useless extension candidates. Maximal degree in co-relation 32779. Up to 4137 conditions per place. [2023-08-24 03:13:24,697 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 424 selfloop transitions, 124 changer transitions 1/562 dead transitions. [2023-08-24 03:13:24,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 562 transitions, 9131 flow [2023-08-24 03:13:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:13:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:13:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 781 transitions. [2023-08-24 03:13:24,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3320578231292517 [2023-08-24 03:13:24,702 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 781 transitions. [2023-08-24 03:13:24,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 781 transitions. [2023-08-24 03:13:24,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:24,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 781 transitions. [2023-08-24 03:13:24,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:24,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:24,706 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:24,706 INFO L175 Difference]: Start difference. First operand has 127 places, 515 transitions, 7660 flow. Second operand 8 states and 781 transitions. [2023-08-24 03:13:24,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 562 transitions, 9131 flow [2023-08-24 03:13:24,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 562 transitions, 9013 flow, removed 58 selfloop flow, removed 1 redundant places. [2023-08-24 03:13:24,863 INFO L231 Difference]: Finished difference. Result has 135 places, 523 transitions, 7950 flow [2023-08-24 03:13:24,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=7562, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7950, PETRI_PLACES=135, PETRI_TRANSITIONS=523} [2023-08-24 03:13:24,864 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2023-08-24 03:13:24,864 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 523 transitions, 7950 flow [2023-08-24 03:13:24,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 91.05) internal successors, (1821), 20 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:24,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:24,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:24,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:25,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 03:13:25,065 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:25,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:25,066 INFO L85 PathProgramCache]: Analyzing trace with hash -713549884, now seen corresponding path program 3 times [2023-08-24 03:13:25,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:25,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351472409] [2023-08-24 03:13:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:25,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:25,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:25,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351472409] [2023-08-24 03:13:25,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351472409] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:25,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549480050] [2023-08-24 03:13:25,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:13:25,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:25,673 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) [2023-08-24 03:13:25,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 03:13:25,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:13:25,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:25,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 03:13:25,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:26,100 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:13:26,103 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:26,103 INFO L351 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 10 [2023-08-24 03:13:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:26,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:26,227 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:26,228 INFO L351 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 28 treesize of output 21 [2023-08-24 03:13:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:26,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549480050] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:26,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:26,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2023-08-24 03:13:26,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852005789] [2023-08-24 03:13:26,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:26,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 03:13:26,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 03:13:26,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-08-24 03:13:26,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 03:13:26,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 523 transitions, 7950 flow. Second operand has 26 states, 26 states have (on average 84.42307692307692) internal successors, (2195), 26 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:26,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:26,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 03:13:26,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:28,032 INFO L124 PetriNetUnfolderBase]: 3449/5034 cut-off events. [2023-08-24 03:13:28,032 INFO L125 PetriNetUnfolderBase]: For 42007/42007 co-relation queries the response was YES. [2023-08-24 03:13:28,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35010 conditions, 5034 events. 3449/5034 cut-off events. For 42007/42007 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24639 event pairs, 594 based on Foata normal form. 1/5035 useless extension candidates. Maximal degree in co-relation 34572. Up to 4430 conditions per place. [2023-08-24 03:13:28,072 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 469 selfloop transitions, 150 changer transitions 2/621 dead transitions. [2023-08-24 03:13:28,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 621 transitions, 10060 flow [2023-08-24 03:13:28,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 03:13:28,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 03:13:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1352 transitions. [2023-08-24 03:13:28,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30657596371882084 [2023-08-24 03:13:28,075 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1352 transitions. [2023-08-24 03:13:28,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1352 transitions. [2023-08-24 03:13:28,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:28,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1352 transitions. [2023-08-24 03:13:28,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 90.13333333333334) internal successors, (1352), 15 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:28,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:28,083 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:28,083 INFO L175 Difference]: Start difference. First operand has 135 places, 523 transitions, 7950 flow. Second operand 15 states and 1352 transitions. [2023-08-24 03:13:28,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 621 transitions, 10060 flow [2023-08-24 03:13:28,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 621 transitions, 9761 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-24 03:13:28,254 INFO L231 Difference]: Finished difference. Result has 149 places, 547 transitions, 8381 flow [2023-08-24 03:13:28,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=7671, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8381, PETRI_PLACES=149, PETRI_TRANSITIONS=547} [2023-08-24 03:13:28,255 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2023-08-24 03:13:28,255 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 547 transitions, 8381 flow [2023-08-24 03:13:28,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.42307692307692) internal successors, (2195), 26 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:28,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:28,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:28,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-24 03:13:28,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:28,458 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:28,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash -252953414, now seen corresponding path program 4 times [2023-08-24 03:13:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178042786] [2023-08-24 03:13:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:28,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:28,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:28,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178042786] [2023-08-24 03:13:28,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178042786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:28,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499535029] [2023-08-24 03:13:28,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:13:28,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:28,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:28,954 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) [2023-08-24 03:13:28,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 03:13:29,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:13:29,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:29,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 03:13:29,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:29,312 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:29,312 INFO L351 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 15 [2023-08-24 03:13:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:29,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:29,500 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:29,500 INFO L351 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 28 treesize of output 21 [2023-08-24 03:13:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:29,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499535029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:29,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:29,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 24 [2023-08-24 03:13:29,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053904960] [2023-08-24 03:13:29,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:29,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 03:13:29,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:29,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 03:13:29,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2023-08-24 03:13:29,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 03:13:29,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 547 transitions, 8381 flow. Second operand has 26 states, 26 states have (on average 84.65384615384616) internal successors, (2201), 26 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:29,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:29,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 03:13:29,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:32,750 INFO L124 PetriNetUnfolderBase]: 4303/6241 cut-off events. [2023-08-24 03:13:32,750 INFO L125 PetriNetUnfolderBase]: For 52388/52388 co-relation queries the response was YES. [2023-08-24 03:13:32,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43055 conditions, 6241 events. 4303/6241 cut-off events. For 52388/52388 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31310 event pairs, 562 based on Foata normal form. 2/6243 useless extension candidates. Maximal degree in co-relation 42582. Up to 4251 conditions per place. [2023-08-24 03:13:32,886 INFO L140 encePairwiseOnDemand]: 281/294 looper letters, 456 selfloop transitions, 543 changer transitions 11/1010 dead transitions. [2023-08-24 03:13:32,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1010 transitions, 15412 flow [2023-08-24 03:13:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-24 03:13:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-24 03:13:32,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4467 transitions. [2023-08-24 03:13:32,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30387755102040814 [2023-08-24 03:13:32,891 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4467 transitions. [2023-08-24 03:13:32,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4467 transitions. [2023-08-24 03:13:32,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:32,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4467 transitions. [2023-08-24 03:13:32,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 89.34) internal successors, (4467), 50 states have internal predecessors, (4467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:32,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 294.0) internal successors, (14994), 51 states have internal predecessors, (14994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:32,913 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 294.0) internal successors, (14994), 51 states have internal predecessors, (14994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:32,914 INFO L175 Difference]: Start difference. First operand has 149 places, 547 transitions, 8381 flow. Second operand 50 states and 4467 transitions. [2023-08-24 03:13:32,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1010 transitions, 15412 flow [2023-08-24 03:13:33,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 1010 transitions, 15093 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-08-24 03:13:33,213 INFO L231 Difference]: Finished difference. Result has 206 places, 844 transitions, 13551 flow [2023-08-24 03:13:33,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=8150, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=13551, PETRI_PLACES=206, PETRI_TRANSITIONS=844} [2023-08-24 03:13:33,214 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2023-08-24 03:13:33,214 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 844 transitions, 13551 flow [2023-08-24 03:13:33,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.65384615384616) internal successors, (2201), 26 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:33,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:33,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:33,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-24 03:13:33,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:33,420 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:33,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1569067930, now seen corresponding path program 5 times [2023-08-24 03:13:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:33,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86312324] [2023-08-24 03:13:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:33,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:34,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86312324] [2023-08-24 03:13:34,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86312324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751496448] [2023-08-24 03:13:34,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:13:34,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:34,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:34,258 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) [2023-08-24 03:13:34,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 03:13:34,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:13:34,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:34,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 03:13:34,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:34,457 INFO L351 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 11 treesize of output 7 [2023-08-24 03:13:34,519 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:34,584 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:34,639 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:34,845 INFO L351 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 22 treesize of output 10 [2023-08-24 03:13:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:34,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:35,381 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:35,381 INFO L351 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 66 treesize of output 55 [2023-08-24 03:13:35,398 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:35,398 INFO L351 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 478 treesize of output 462 [2023-08-24 03:13:35,420 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:35,420 INFO L351 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 222 treesize of output 198 [2023-08-24 03:13:35,443 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:35,444 INFO L351 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 91 treesize of output 92 [2023-08-24 03:13:35,464 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:35,469 INFO L351 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 98 treesize of output 91 [2023-08-24 03:13:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:37,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751496448] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:37,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:37,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 29 [2023-08-24 03:13:37,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254206957] [2023-08-24 03:13:37,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:37,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 03:13:37,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:37,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 03:13:37,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=764, Unknown=5, NotChecked=0, Total=930 [2023-08-24 03:13:37,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 03:13:37,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 844 transitions, 13551 flow. Second operand has 31 states, 31 states have (on average 74.2258064516129) internal successors, (2301), 31 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) [2023-08-24 03:13:37,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:37,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 03:13:37,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:40,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:13:42,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:13:49,366 INFO L124 PetriNetUnfolderBase]: 4921/7158 cut-off events. [2023-08-24 03:13:49,366 INFO L125 PetriNetUnfolderBase]: For 69000/69000 co-relation queries the response was YES. [2023-08-24 03:13:49,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53305 conditions, 7158 events. 4921/7158 cut-off events. For 69000/69000 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 36819 event pairs, 677 based on Foata normal form. 4/7162 useless extension candidates. Maximal degree in co-relation 52766. Up to 6048 conditions per place. [2023-08-24 03:13:49,435 INFO L140 encePairwiseOnDemand]: 281/294 looper letters, 821 selfloop transitions, 257 changer transitions 3/1081 dead transitions. [2023-08-24 03:13:49,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 1081 transitions, 18596 flow [2023-08-24 03:13:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 03:13:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 03:13:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2149 transitions. [2023-08-24 03:13:49,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2707231040564374 [2023-08-24 03:13:49,438 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2149 transitions. [2023-08-24 03:13:49,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2149 transitions. [2023-08-24 03:13:49,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:49,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2149 transitions. [2023-08-24 03:13:49,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 79.5925925925926) internal successors, (2149), 27 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:49,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 294.0) internal successors, (8232), 28 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:49,449 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 294.0) internal successors, (8232), 28 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:49,449 INFO L175 Difference]: Start difference. First operand has 206 places, 844 transitions, 13551 flow. Second operand 27 states and 2149 transitions. [2023-08-24 03:13:49,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 1081 transitions, 18596 flow [2023-08-24 03:13:49,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1081 transitions, 16269 flow, removed 1035 selfloop flow, removed 7 redundant places. [2023-08-24 03:13:49,968 INFO L231 Difference]: Finished difference. Result has 236 places, 933 transitions, 13644 flow [2023-08-24 03:13:49,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=11705, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13644, PETRI_PLACES=236, PETRI_TRANSITIONS=933} [2023-08-24 03:13:49,968 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2023-08-24 03:13:49,969 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 933 transitions, 13644 flow [2023-08-24 03:13:49,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 74.2258064516129) internal successors, (2301), 31 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) [2023-08-24 03:13:49,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:49,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:49,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:50,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:50,170 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:50,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1342128478, now seen corresponding path program 5 times [2023-08-24 03:13:50,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:50,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40933012] [2023-08-24 03:13:50,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:50,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:50,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40933012] [2023-08-24 03:13:50,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40933012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:50,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861904649] [2023-08-24 03:13:50,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:13:50,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:50,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:50,901 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) [2023-08-24 03:13:50,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 03:13:51,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:13:51,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:51,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:13:51,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:51,087 INFO L351 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 11 treesize of output 7 [2023-08-24 03:13:51,135 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:51,185 INFO L351 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 6 treesize of output 5 [2023-08-24 03:13:51,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:13:51,396 INFO L351 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 14 treesize of output 16 [2023-08-24 03:13:51,412 INFO L351 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 22 treesize of output 10 [2023-08-24 03:13:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:51,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:51,529 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_850 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_850) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) 4294967296))) is different from false [2023-08-24 03:13:51,580 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_850 (Array Int Int))) (= (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_850) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) 4294967296))) is different from false [2023-08-24 03:13:51,644 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_849 (Array Int Int)) (v_ArrVal_850 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_849))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ c_~sum1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_850) c_~A~0.base) c_~A~0.offset)) 4294967296)))) is different from false [2023-08-24 03:13:51,661 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_849 (Array Int Int)) (v_ArrVal_848 (Array Int Int)) (v_ArrVal_850 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_848) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_849))) (= (mod (+ c_~sum1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_850) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296) (mod (+ c_~sum3~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|) c_~sum2~0) 4294967296)))) is different from false [2023-08-24 03:13:51,677 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:51,677 INFO L351 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 59 treesize of output 48 [2023-08-24 03:13:51,684 INFO L351 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 6838 treesize of output 6454 [2023-08-24 03:13:51,697 INFO L351 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 93 treesize of output 87 [2023-08-24 03:13:51,702 INFO L351 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 186 treesize of output 178 [2023-08-24 03:13:51,721 INFO L351 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 94 treesize of output 82 [2023-08-24 03:13:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 03:13:53,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861904649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:53,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:53,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-24 03:13:53,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852043841] [2023-08-24 03:13:53,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:53,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 03:13:53,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 03:13:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=393, Unknown=11, NotChecked=180, Total=702 [2023-08-24 03:13:53,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:13:53,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 933 transitions, 13644 flow. Second operand has 27 states, 27 states have (on average 90.0) internal successors, (2430), 27 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:53,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:53,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:13:53,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:55,125 INFO L124 PetriNetUnfolderBase]: 4990/7274 cut-off events. [2023-08-24 03:13:55,125 INFO L125 PetriNetUnfolderBase]: For 75262/75669 co-relation queries the response was YES. [2023-08-24 03:13:55,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53874 conditions, 7274 events. 4990/7274 cut-off events. For 75262/75669 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 39106 event pairs, 572 based on Foata normal form. 336/7432 useless extension candidates. Maximal degree in co-relation 53549. Up to 6197 conditions per place. [2023-08-24 03:13:55,189 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 764 selfloop transitions, 206 changer transitions 2/996 dead transitions. [2023-08-24 03:13:55,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 996 transitions, 16184 flow [2023-08-24 03:13:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:13:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:13:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 882 transitions. [2023-08-24 03:13:55,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-24 03:13:55,191 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 882 transitions. [2023-08-24 03:13:55,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 882 transitions. [2023-08-24 03:13:55,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:55,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 882 transitions. [2023-08-24 03:13:55,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.0) internal successors, (882), 9 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:55,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:55,194 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:55,194 INFO L175 Difference]: Start difference. First operand has 236 places, 933 transitions, 13644 flow. Second operand 9 states and 882 transitions. [2023-08-24 03:13:55,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 996 transitions, 16184 flow [2023-08-24 03:13:55,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 996 transitions, 15788 flow, removed 80 selfloop flow, removed 13 redundant places. [2023-08-24 03:13:55,597 INFO L231 Difference]: Finished difference. Result has 232 places, 946 transitions, 13904 flow [2023-08-24 03:13:55,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=13248, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13904, PETRI_PLACES=232, PETRI_TRANSITIONS=946} [2023-08-24 03:13:55,597 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2023-08-24 03:13:55,598 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 946 transitions, 13904 flow [2023-08-24 03:13:55,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.0) internal successors, (2430), 27 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:55,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:55,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:55,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 03:13:55,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:55,799 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:13:55,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:13:55,800 INFO L85 PathProgramCache]: Analyzing trace with hash -491606162, now seen corresponding path program 6 times [2023-08-24 03:13:55,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:13:55,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744766679] [2023-08-24 03:13:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:13:55,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:13:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:13:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:13:56,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:13:56,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744766679] [2023-08-24 03:13:56,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744766679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:13:56,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269242099] [2023-08-24 03:13:56,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:13:56,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:13:56,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:13:56,393 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) [2023-08-24 03:13:56,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 03:13:56,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:13:56,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:13:56,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 03:13:56,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:13:56,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:13:56,691 INFO L351 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 14 treesize of output 16 [2023-08-24 03:13:56,738 INFO L351 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 22 treesize of output 10 [2023-08-24 03:13:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:13:56,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:13:56,946 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_895 (Array Int Int))) (= (mod c_~sum1~0 4294967296) (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_895) c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork1_~i~1 4)))) 4294967296))) is different from false [2023-08-24 03:13:56,961 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:13:56,961 INFO L351 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 64 treesize of output 48 [2023-08-24 03:13:56,966 INFO L351 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 22 treesize of output 16 [2023-08-24 03:13:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-24 03:13:57,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269242099] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:13:57,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:13:57,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-08-24 03:13:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232767306] [2023-08-24 03:13:57,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:13:57,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 03:13:57,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:13:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 03:13:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=361, Unknown=1, NotChecked=40, Total=506 [2023-08-24 03:13:57,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:13:57,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 946 transitions, 13904 flow. Second operand has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 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) [2023-08-24 03:13:57,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:13:57,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:13:57,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:13:59,413 INFO L124 PetriNetUnfolderBase]: 5151/7506 cut-off events. [2023-08-24 03:13:59,413 INFO L125 PetriNetUnfolderBase]: For 81116/81600 co-relation queries the response was YES. [2023-08-24 03:13:59,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56384 conditions, 7506 events. 5151/7506 cut-off events. For 81116/81600 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 40603 event pairs, 685 based on Foata normal form. 367/7683 useless extension candidates. Maximal degree in co-relation 56081. Up to 6535 conditions per place. [2023-08-24 03:13:59,539 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 761 selfloop transitions, 229 changer transitions 1/1015 dead transitions. [2023-08-24 03:13:59,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1015 transitions, 16643 flow [2023-08-24 03:13:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:13:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:13:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 784 transitions. [2023-08-24 03:13:59,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-24 03:13:59,547 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 784 transitions. [2023-08-24 03:13:59,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 784 transitions. [2023-08-24 03:13:59,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:13:59,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 784 transitions. [2023-08-24 03:13:59,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:59,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:59,551 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:13:59,551 INFO L175 Difference]: Start difference. First operand has 232 places, 946 transitions, 13904 flow. Second operand 8 states and 784 transitions. [2023-08-24 03:13:59,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1015 transitions, 16643 flow [2023-08-24 03:13:59,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 1015 transitions, 16214 flow, removed 28 selfloop flow, removed 6 redundant places. [2023-08-24 03:13:59,966 INFO L231 Difference]: Finished difference. Result has 235 places, 965 transitions, 14417 flow [2023-08-24 03:13:59,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=13475, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14417, PETRI_PLACES=235, PETRI_TRANSITIONS=965} [2023-08-24 03:13:59,967 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2023-08-24 03:13:59,967 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 965 transitions, 14417 flow [2023-08-24 03:13:59,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 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) [2023-08-24 03:13:59,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:13:59,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:13:59,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 03:14:00,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:00,169 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:14:00,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:00,169 INFO L85 PathProgramCache]: Analyzing trace with hash 742006878, now seen corresponding path program 7 times [2023-08-24 03:14:00,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:00,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722119988] [2023-08-24 03:14:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:00,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:00,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722119988] [2023-08-24 03:14:00,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722119988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:00,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244580076] [2023-08-24 03:14:00,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:14:00,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:00,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:00,762 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) [2023-08-24 03:14:00,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 03:14:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:00,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:14:00,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:00,914 INFO L351 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 11 treesize of output 7 [2023-08-24 03:14:00,947 INFO L351 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 6 treesize of output 5 [2023-08-24 03:14:00,991 INFO L351 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 6 treesize of output 5 [2023-08-24 03:14:01,058 INFO L351 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 6 treesize of output 5 [2023-08-24 03:14:01,111 INFO L351 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 22 treesize of output 10 [2023-08-24 03:14:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:01,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:01,292 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_944 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_944) c_~A~0.base))) (= (mod (+ (select .cse0 c_~A~0.offset) c_~sum1~0) 4294967296) (mod (+ c_~sum3~0 (select .cse0 (+ c_~A~0.offset (* c_thread2Thread1of1ForFork1_~i~1 4))) c_~sum2~0) 4294967296)))) is different from false [2023-08-24 03:14:01,298 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_944 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_944) c_~A~0.base) c_~A~0.offset))) (= (mod (+ .cse0 c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ .cse0 c_~sum1~0) 4294967296)))) is different from false [2023-08-24 03:14:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:01,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244580076] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:01,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:01,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 21 [2023-08-24 03:14:01,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821967617] [2023-08-24 03:14:01,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:01,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 03:14:01,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:01,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 03:14:01,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=324, Unknown=2, NotChecked=78, Total=506 [2023-08-24 03:14:01,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:14:01,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 965 transitions, 14417 flow. Second operand has 23 states, 23 states have (on average 90.65217391304348) internal successors, (2085), 23 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:01,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:01,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:14:01,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:03,270 INFO L124 PetriNetUnfolderBase]: 5360/7798 cut-off events. [2023-08-24 03:14:03,271 INFO L125 PetriNetUnfolderBase]: For 91571/92088 co-relation queries the response was YES. [2023-08-24 03:14:03,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59214 conditions, 7798 events. 5360/7798 cut-off events. For 91571/92088 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42327 event pairs, 670 based on Foata normal form. 401/8001 useless extension candidates. Maximal degree in co-relation 58819. Up to 7030 conditions per place. [2023-08-24 03:14:03,348 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 819 selfloop transitions, 174 changer transitions 1/1018 dead transitions. [2023-08-24 03:14:03,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1018 transitions, 16974 flow [2023-08-24 03:14:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:14:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:14:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 779 transitions. [2023-08-24 03:14:03,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312074829931973 [2023-08-24 03:14:03,350 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 779 transitions. [2023-08-24 03:14:03,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 779 transitions. [2023-08-24 03:14:03,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:14:03,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 779 transitions. [2023-08-24 03:14:03,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.375) internal successors, (779), 8 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:03,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:03,354 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:03,354 INFO L175 Difference]: Start difference. First operand has 235 places, 965 transitions, 14417 flow. Second operand 8 states and 779 transitions. [2023-08-24 03:14:03,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 1018 transitions, 16974 flow [2023-08-24 03:14:03,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1018 transitions, 16543 flow, removed 48 selfloop flow, removed 5 redundant places. [2023-08-24 03:14:03,877 INFO L231 Difference]: Finished difference. Result has 240 places, 981 transitions, 14680 flow [2023-08-24 03:14:03,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=13994, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14680, PETRI_PLACES=240, PETRI_TRANSITIONS=981} [2023-08-24 03:14:03,878 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2023-08-24 03:14:03,879 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 981 transitions, 14680 flow [2023-08-24 03:14:03,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 90.65217391304348) internal successors, (2085), 23 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:03,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:14:03,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:14:03,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 03:14:04,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:04,081 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:14:04,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:04,081 INFO L85 PathProgramCache]: Analyzing trace with hash -500303968, now seen corresponding path program 6 times [2023-08-24 03:14:04,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:04,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520775325] [2023-08-24 03:14:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:04,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:04,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:04,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520775325] [2023-08-24 03:14:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520775325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:04,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718945622] [2023-08-24 03:14:04,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:14:04,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:04,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:04,968 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) [2023-08-24 03:14:04,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 03:14:05,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:14:05,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:14:05,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 03:14:05,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:05,140 INFO L351 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 11 treesize of output 7 [2023-08-24 03:14:05,200 INFO L351 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 6 treesize of output 5 [2023-08-24 03:14:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:14:05,388 INFO L351 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 14 treesize of output 16 [2023-08-24 03:14:05,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:14:05,487 INFO L351 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 14 treesize of output 16 [2023-08-24 03:14:05,665 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:14:05,667 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:05,667 INFO L351 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 10 [2023-08-24 03:14:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:05,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:06,305 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:06,305 INFO L351 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 60 treesize of output 49 [2023-08-24 03:14:06,317 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 03:14:06,317 INFO L351 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 490 treesize of output 446 [2023-08-24 03:14:06,326 INFO L351 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 216 treesize of output 192 [2023-08-24 03:14:06,331 INFO L351 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 192 treesize of output 180 [2023-08-24 03:14:06,346 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 03:14:06,346 INFO L351 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 96 treesize of output 87 [2023-08-24 03:14:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:08,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718945622] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:08,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:08,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-24 03:14:08,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559950846] [2023-08-24 03:14:08,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:08,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 03:14:08,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:08,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 03:14:08,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1024, Unknown=29, NotChecked=0, Total=1190 [2023-08-24 03:14:08,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 03:14:08,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 981 transitions, 14680 flow. Second operand has 35 states, 35 states have (on average 73.97142857142858) internal successors, (2589), 35 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:08,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:08,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 03:14:08,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:16,396 INFO L124 PetriNetUnfolderBase]: 6753/9979 cut-off events. [2023-08-24 03:14:16,396 INFO L125 PetriNetUnfolderBase]: For 107932/107932 co-relation queries the response was YES. [2023-08-24 03:14:16,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72561 conditions, 9979 events. 6753/9979 cut-off events. For 107932/107932 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 56262 event pairs, 923 based on Foata normal form. 5/9970 useless extension candidates. Maximal degree in co-relation 72253. Up to 6309 conditions per place. [2023-08-24 03:14:16,496 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 741 selfloop transitions, 564 changer transitions 5/1310 dead transitions. [2023-08-24 03:14:16,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 1310 transitions, 21323 flow [2023-08-24 03:14:16,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 03:14:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 03:14:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1577 transitions. [2023-08-24 03:14:16,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.282312925170068 [2023-08-24 03:14:16,503 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1577 transitions. [2023-08-24 03:14:16,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1577 transitions. [2023-08-24 03:14:16,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:14:16,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1577 transitions. [2023-08-24 03:14:16,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.0) internal successors, (1577), 19 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:16,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 294.0) internal successors, (5880), 20 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:16,510 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 294.0) internal successors, (5880), 20 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:16,510 INFO L175 Difference]: Start difference. First operand has 240 places, 981 transitions, 14680 flow. Second operand 19 states and 1577 transitions. [2023-08-24 03:14:16,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 1310 transitions, 21323 flow [2023-08-24 03:14:17,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1310 transitions, 21062 flow, removed 50 selfloop flow, removed 3 redundant places. [2023-08-24 03:14:17,328 INFO L231 Difference]: Finished difference. Result has 265 places, 1114 transitions, 18442 flow [2023-08-24 03:14:17,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=14419, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=438, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=18442, PETRI_PLACES=265, PETRI_TRANSITIONS=1114} [2023-08-24 03:14:17,329 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2023-08-24 03:14:17,329 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 1114 transitions, 18442 flow [2023-08-24 03:14:17,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 73.97142857142858) internal successors, (2589), 35 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:17,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:14:17,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:14:17,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 03:14:17,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-24 03:14:17,535 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:14:17,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1140397668, now seen corresponding path program 8 times [2023-08-24 03:14:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:17,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763798952] [2023-08-24 03:14:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:17,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:18,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:18,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763798952] [2023-08-24 03:14:18,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763798952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:18,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798718173] [2023-08-24 03:14:18,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:14:18,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:18,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:18,132 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) [2023-08-24 03:14:18,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 03:14:18,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:14:18,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:14:18,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 03:14:18,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:18,391 INFO L351 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 22 treesize of output 10 [2023-08-24 03:14:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:18,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:18,497 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:18,497 INFO L351 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 28 treesize of output 21 [2023-08-24 03:14:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:18,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798718173] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:18,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:18,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 16 [2023-08-24 03:14:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453617938] [2023-08-24 03:14:18,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:18,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 03:14:18,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:18,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 03:14:18,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-08-24 03:14:18,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:14:18,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 1114 transitions, 18442 flow. Second operand has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:18,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:18,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:14:18,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:21,326 INFO L124 PetriNetUnfolderBase]: 6418/9499 cut-off events. [2023-08-24 03:14:21,326 INFO L125 PetriNetUnfolderBase]: For 146872/147676 co-relation queries the response was YES. [2023-08-24 03:14:21,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77607 conditions, 9499 events. 6418/9499 cut-off events. For 146872/147676 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 55524 event pairs, 1087 based on Foata normal form. 599/9827 useless extension candidates. Maximal degree in co-relation 77280. Up to 8829 conditions per place. [2023-08-24 03:14:21,441 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 972 selfloop transitions, 155 changer transitions 1/1156 dead transitions. [2023-08-24 03:14:21,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 1156 transitions, 21198 flow [2023-08-24 03:14:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:14:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:14:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 778 transitions. [2023-08-24 03:14:21,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307823129251701 [2023-08-24 03:14:21,446 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 778 transitions. [2023-08-24 03:14:21,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 778 transitions. [2023-08-24 03:14:21,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:14:21,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 778 transitions. [2023-08-24 03:14:21,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.25) internal successors, (778), 8 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:21,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:21,454 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:21,454 INFO L175 Difference]: Start difference. First operand has 265 places, 1114 transitions, 18442 flow. Second operand 8 states and 778 transitions. [2023-08-24 03:14:21,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 1156 transitions, 21198 flow [2023-08-24 03:14:22,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1156 transitions, 20481 flow, removed 275 selfloop flow, removed 4 redundant places. [2023-08-24 03:14:22,304 INFO L231 Difference]: Finished difference. Result has 270 places, 1120 transitions, 18204 flow [2023-08-24 03:14:22,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=17725, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=959, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18204, PETRI_PLACES=270, PETRI_TRANSITIONS=1120} [2023-08-24 03:14:22,306 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2023-08-24 03:14:22,306 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 1120 transitions, 18204 flow [2023-08-24 03:14:22,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:22,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:14:22,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:14:22,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 03:14:22,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 03:14:22,512 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:14:22,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:22,512 INFO L85 PathProgramCache]: Analyzing trace with hash 857972372, now seen corresponding path program 9 times [2023-08-24 03:14:22,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:22,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694179308] [2023-08-24 03:14:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:22,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:23,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:23,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694179308] [2023-08-24 03:14:23,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694179308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:23,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589308503] [2023-08-24 03:14:23,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:14:23,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:23,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:23,178 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) [2023-08-24 03:14:23,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 03:14:23,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:14:23,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:14:23,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 03:14:23,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:23,422 INFO L351 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 22 treesize of output 10 [2023-08-24 03:14:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:23,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:23,556 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:23,557 INFO L351 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 28 treesize of output 21 [2023-08-24 03:14:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:23,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589308503] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:23,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:23,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 15 [2023-08-24 03:14:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987850732] [2023-08-24 03:14:23,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:23,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 03:14:23,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 03:14:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-08-24 03:14:23,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:14:23,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1120 transitions, 18204 flow. Second operand has 17 states, 17 states have (on average 91.52941176470588) internal successors, (1556), 17 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:23,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:23,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:14:23,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:26,653 INFO L124 PetriNetUnfolderBase]: 6489/9613 cut-off events. [2023-08-24 03:14:26,654 INFO L125 PetriNetUnfolderBase]: For 136732/137553 co-relation queries the response was YES. [2023-08-24 03:14:26,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77105 conditions, 9613 events. 6489/9613 cut-off events. For 136732/137553 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 56398 event pairs, 1118 based on Foata normal form. 608/9946 useless extension candidates. Maximal degree in co-relation 76773. Up to 8760 conditions per place. [2023-08-24 03:14:26,762 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 955 selfloop transitions, 197 changer transitions 1/1181 dead transitions. [2023-08-24 03:14:26,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 1181 transitions, 21312 flow [2023-08-24 03:14:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:14:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:14:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 781 transitions. [2023-08-24 03:14:26,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3320578231292517 [2023-08-24 03:14:26,763 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 781 transitions. [2023-08-24 03:14:26,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 781 transitions. [2023-08-24 03:14:26,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:14:26,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 781 transitions. [2023-08-24 03:14:26,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:26,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:26,766 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:26,766 INFO L175 Difference]: Start difference. First operand has 270 places, 1120 transitions, 18204 flow. Second operand 8 states and 781 transitions. [2023-08-24 03:14:26,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 1181 transitions, 21312 flow [2023-08-24 03:14:27,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1181 transitions, 20913 flow, removed 46 selfloop flow, removed 5 redundant places. [2023-08-24 03:14:27,603 INFO L231 Difference]: Finished difference. Result has 274 places, 1134 transitions, 18628 flow [2023-08-24 03:14:27,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=17805, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=923, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18628, PETRI_PLACES=274, PETRI_TRANSITIONS=1134} [2023-08-24 03:14:27,605 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2023-08-24 03:14:27,605 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 1134 transitions, 18628 flow [2023-08-24 03:14:27,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 91.52941176470588) internal successors, (1556), 17 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:27,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:14:27,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:14:27,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 03:14:27,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 03:14:27,811 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:14:27,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:27,811 INFO L85 PathProgramCache]: Analyzing trace with hash -369171528, now seen corresponding path program 7 times [2023-08-24 03:14:27,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:27,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340660919] [2023-08-24 03:14:27,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:27,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:28,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:28,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340660919] [2023-08-24 03:14:28,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340660919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:28,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504082845] [2023-08-24 03:14:28,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:14:28,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:28,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:28,589 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) [2023-08-24 03:14:28,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 03:14:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:28,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 03:14:28,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:29,051 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:14:29,054 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:29,054 INFO L351 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 10 [2023-08-24 03:14:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:29,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:29,222 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:29,222 INFO L351 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 24 treesize of output 21 [2023-08-24 03:14:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:29,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504082845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:29,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:29,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-24 03:14:29,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869959396] [2023-08-24 03:14:29,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:29,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 03:14:29,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:29,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 03:14:29,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2023-08-24 03:14:29,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 03:14:29,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 1134 transitions, 18628 flow. Second operand has 27 states, 27 states have (on average 84.55555555555556) internal successors, (2283), 27 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:29,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:29,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 03:14:29,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:33,212 INFO L124 PetriNetUnfolderBase]: 7047/10446 cut-off events. [2023-08-24 03:14:33,212 INFO L125 PetriNetUnfolderBase]: For 128282/128282 co-relation queries the response was YES. [2023-08-24 03:14:33,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80389 conditions, 10446 events. 7047/10446 cut-off events. For 128282/128282 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 59470 event pairs, 1272 based on Foata normal form. 2/10434 useless extension candidates. Maximal degree in co-relation 80056. Up to 9404 conditions per place. [2023-08-24 03:14:33,413 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 996 selfloop transitions, 247 changer transitions 5/1248 dead transitions. [2023-08-24 03:14:33,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 1248 transitions, 22415 flow [2023-08-24 03:14:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 03:14:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 03:14:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1525 transitions. [2023-08-24 03:14:33,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051220488195278 [2023-08-24 03:14:33,415 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1525 transitions. [2023-08-24 03:14:33,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1525 transitions. [2023-08-24 03:14:33,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:14:33,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1525 transitions. [2023-08-24 03:14:33,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.70588235294117) internal successors, (1525), 17 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) [2023-08-24 03:14:33,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:33,420 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:33,420 INFO L175 Difference]: Start difference. First operand has 274 places, 1134 transitions, 18628 flow. Second operand 17 states and 1525 transitions. [2023-08-24 03:14:33,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 1248 transitions, 22415 flow [2023-08-24 03:14:34,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1248 transitions, 21858 flow, removed 117 selfloop flow, removed 5 redundant places. [2023-08-24 03:14:34,428 INFO L231 Difference]: Finished difference. Result has 290 places, 1162 transitions, 19202 flow [2023-08-24 03:14:34,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=18079, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=894, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19202, PETRI_PLACES=290, PETRI_TRANSITIONS=1162} [2023-08-24 03:14:34,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2023-08-24 03:14:34,429 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 1162 transitions, 19202 flow [2023-08-24 03:14:34,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.55555555555556) internal successors, (2283), 27 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:34,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:14:34,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:14:34,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 03:14:34,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:34,635 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:14:34,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:34,635 INFO L85 PathProgramCache]: Analyzing trace with hash -818294988, now seen corresponding path program 8 times [2023-08-24 03:14:34,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:34,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129830569] [2023-08-24 03:14:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:34,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:35,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:35,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129830569] [2023-08-24 03:14:35,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129830569] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:35,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724368866] [2023-08-24 03:14:35,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:14:35,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:35,385 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) [2023-08-24 03:14:35,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 03:14:35,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:14:35,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:14:35,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 03:14:35,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:35,843 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:14:35,846 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:35,846 INFO L351 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 10 [2023-08-24 03:14:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:35,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:36,004 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:36,005 INFO L351 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 24 treesize of output 21 [2023-08-24 03:14:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:36,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724368866] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:36,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:36,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-24 03:14:36,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331667513] [2023-08-24 03:14:36,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:36,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 03:14:36,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 03:14:36,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-08-24 03:14:36,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 03:14:36,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 1162 transitions, 19202 flow. Second operand has 27 states, 27 states have (on average 84.55555555555556) internal successors, (2283), 27 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:36,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:36,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 03:14:36,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:40,280 INFO L124 PetriNetUnfolderBase]: 7145/10627 cut-off events. [2023-08-24 03:14:40,281 INFO L125 PetriNetUnfolderBase]: For 127723/127723 co-relation queries the response was YES. [2023-08-24 03:14:40,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81490 conditions, 10627 events. 7145/10627 cut-off events. For 127723/127723 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 61097 event pairs, 1298 based on Foata normal form. 2/10615 useless extension candidates. Maximal degree in co-relation 81150. Up to 9613 conditions per place. [2023-08-24 03:14:40,426 INFO L140 encePairwiseOnDemand]: 281/294 looper letters, 1028 selfloop transitions, 255 changer transitions 5/1288 dead transitions. [2023-08-24 03:14:40,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 1288 transitions, 23280 flow [2023-08-24 03:14:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 03:14:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 03:14:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1786 transitions. [2023-08-24 03:14:40,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30374149659863947 [2023-08-24 03:14:40,428 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1786 transitions. [2023-08-24 03:14:40,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1786 transitions. [2023-08-24 03:14:40,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:14:40,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1786 transitions. [2023-08-24 03:14:40,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 89.3) internal successors, (1786), 20 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:40,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:40,433 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:40,433 INFO L175 Difference]: Start difference. First operand has 290 places, 1162 transitions, 19202 flow. Second operand 20 states and 1786 transitions. [2023-08-24 03:14:40,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 1288 transitions, 23280 flow [2023-08-24 03:14:41,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1288 transitions, 22720 flow, removed 84 selfloop flow, removed 9 redundant places. [2023-08-24 03:14:41,549 INFO L231 Difference]: Finished difference. Result has 305 places, 1201 transitions, 20074 flow [2023-08-24 03:14:41,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=18662, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=921, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=20074, PETRI_PLACES=305, PETRI_TRANSITIONS=1201} [2023-08-24 03:14:41,550 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2023-08-24 03:14:41,550 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1201 transitions, 20074 flow [2023-08-24 03:14:41,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.55555555555556) internal successors, (2283), 27 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:41,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:14:41,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:14:41,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 03:14:41,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 03:14:41,756 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:14:41,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:41,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1858762800, now seen corresponding path program 9 times [2023-08-24 03:14:41,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017123494] [2023-08-24 03:14:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:41,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:42,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:42,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017123494] [2023-08-24 03:14:42,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017123494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789498097] [2023-08-24 03:14:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:14:42,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:42,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:42,357 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) [2023-08-24 03:14:42,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 03:14:42,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:14:42,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:14:42,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 03:14:42,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:42,825 INFO L351 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 22 treesize of output 10 [2023-08-24 03:14:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:42,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:43,035 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:43,035 INFO L351 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 24 treesize of output 21 [2023-08-24 03:14:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:43,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789498097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:43,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:43,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-24 03:14:43,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477806521] [2023-08-24 03:14:43,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:43,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 03:14:43,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 03:14:43,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-24 03:14:43,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 03:14:43,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1201 transitions, 20074 flow. Second operand has 23 states, 23 states have (on average 84.95652173913044) internal successors, (1954), 23 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:43,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:43,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 03:14:43,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:47,589 INFO L124 PetriNetUnfolderBase]: 7443/11077 cut-off events. [2023-08-24 03:14:47,589 INFO L125 PetriNetUnfolderBase]: For 136412/136412 co-relation queries the response was YES. [2023-08-24 03:14:47,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85673 conditions, 11077 events. 7443/11077 cut-off events. For 136412/136412 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 64241 event pairs, 1554 based on Foata normal form. 2/11065 useless extension candidates. Maximal degree in co-relation 85316. Up to 10226 conditions per place. [2023-08-24 03:14:47,720 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 1067 selfloop transitions, 308 changer transitions 3/1378 dead transitions. [2023-08-24 03:14:47,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1378 transitions, 25119 flow [2023-08-24 03:14:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 03:14:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 03:14:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2494 transitions. [2023-08-24 03:14:47,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30296404275996114 [2023-08-24 03:14:47,723 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2494 transitions. [2023-08-24 03:14:47,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2494 transitions. [2023-08-24 03:14:47,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:14:47,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2494 transitions. [2023-08-24 03:14:47,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 89.07142857142857) internal successors, (2494), 28 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:47,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 294.0) internal successors, (8526), 29 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:47,730 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 294.0) internal successors, (8526), 29 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:47,731 INFO L175 Difference]: Start difference. First operand has 305 places, 1201 transitions, 20074 flow. Second operand 28 states and 2494 transitions. [2023-08-24 03:14:47,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1378 transitions, 25119 flow [2023-08-24 03:14:48,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1378 transitions, 24596 flow, removed 157 selfloop flow, removed 9 redundant places. [2023-08-24 03:14:48,743 INFO L231 Difference]: Finished difference. Result has 331 places, 1283 transitions, 21784 flow [2023-08-24 03:14:48,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=19648, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=957, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=21784, PETRI_PLACES=331, PETRI_TRANSITIONS=1283} [2023-08-24 03:14:48,745 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2023-08-24 03:14:48,745 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 1283 transitions, 21784 flow [2023-08-24 03:14:48,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 84.95652173913044) internal successors, (1954), 23 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:48,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:14:48,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:14:48,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 03:14:48,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 03:14:48,947 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:14:48,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:48,948 INFO L85 PathProgramCache]: Analyzing trace with hash -26686250, now seen corresponding path program 10 times [2023-08-24 03:14:48,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:48,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066404561] [2023-08-24 03:14:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:49,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:49,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066404561] [2023-08-24 03:14:49,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066404561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:49,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621525693] [2023-08-24 03:14:49,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:14:49,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:49,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:49,692 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) [2023-08-24 03:14:49,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 03:14:49,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:14:49,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:14:49,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 03:14:49,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:50,044 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:50,045 INFO L351 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 15 [2023-08-24 03:14:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:50,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:50,306 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 03:14:50,307 INFO L351 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 28 treesize of output 17 [2023-08-24 03:14:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:50,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621525693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:50,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:50,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 23 [2023-08-24 03:14:50,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820782126] [2023-08-24 03:14:50,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:50,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:14:50,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:50,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:14:50,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:14:50,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 03:14:50,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1283 transitions, 21784 flow. Second operand has 25 states, 25 states have (on average 84.76) internal successors, (2119), 25 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:50,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:50,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 03:14:50,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:55,863 INFO L124 PetriNetUnfolderBase]: 7708/11524 cut-off events. [2023-08-24 03:14:55,863 INFO L125 PetriNetUnfolderBase]: For 149001/149001 co-relation queries the response was YES. [2023-08-24 03:14:55,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90830 conditions, 11524 events. 7708/11524 cut-off events. For 149001/149001 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 67983 event pairs, 1404 based on Foata normal form. 2/11512 useless extension candidates. Maximal degree in co-relation 90450. Up to 9570 conditions per place. [2023-08-24 03:14:56,025 INFO L140 encePairwiseOnDemand]: 281/294 looper letters, 1012 selfloop transitions, 465 changer transitions 9/1486 dead transitions. [2023-08-24 03:14:56,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1486 transitions, 27504 flow [2023-08-24 03:14:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 03:14:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 03:14:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2322 transitions. [2023-08-24 03:14:56,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30376766091051804 [2023-08-24 03:14:56,029 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2322 transitions. [2023-08-24 03:14:56,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2322 transitions. [2023-08-24 03:14:56,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:14:56,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2322 transitions. [2023-08-24 03:14:56,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 89.3076923076923) internal successors, (2322), 26 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:56,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 294.0) internal successors, (7938), 27 states have internal predecessors, (7938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:56,038 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 294.0) internal successors, (7938), 27 states have internal predecessors, (7938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:56,038 INFO L175 Difference]: Start difference. First operand has 331 places, 1283 transitions, 21784 flow. Second operand 26 states and 2322 transitions. [2023-08-24 03:14:56,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1486 transitions, 27504 flow [2023-08-24 03:14:57,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1486 transitions, 26632 flow, removed 346 selfloop flow, removed 8 redundant places. [2023-08-24 03:14:57,488 INFO L231 Difference]: Finished difference. Result has 357 places, 1384 transitions, 24074 flow [2023-08-24 03:14:57,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=21116, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=872, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=24074, PETRI_PLACES=357, PETRI_TRANSITIONS=1384} [2023-08-24 03:14:57,489 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 327 predicate places. [2023-08-24 03:14:57,489 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 1384 transitions, 24074 flow [2023-08-24 03:14:57,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.76) internal successors, (2119), 25 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:57,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:14:57,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:14:57,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 03:14:57,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:57,690 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:14:57,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1144111534, now seen corresponding path program 10 times [2023-08-24 03:14:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:57,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900662428] [2023-08-24 03:14:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:57,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900662428] [2023-08-24 03:14:58,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900662428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958617008] [2023-08-24 03:14:58,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:14:58,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:58,224 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) [2023-08-24 03:14:58,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 03:14:58,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:14:58,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:14:58,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:14:58,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:58,375 INFO L351 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 11 treesize of output 7 [2023-08-24 03:14:58,416 INFO L351 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 6 treesize of output 5 [2023-08-24 03:14:58,465 INFO L351 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 6 treesize of output 5 [2023-08-24 03:14:58,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:14:58,564 INFO L351 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 14 treesize of output 16 [2023-08-24 03:14:58,613 INFO L351 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 22 treesize of output 10 [2023-08-24 03:14:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:58,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:58,792 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1306 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork1_~i~1 4)))) 4294967296) (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1306) c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296))) is different from false [2023-08-24 03:14:58,843 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1306 (Array Int Int)) (v_ArrVal_1305 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1305))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ c_~sum1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1306) c_~A~0.base) c_~A~0.offset)) 4294967296)))) is different from false [2023-08-24 03:14:58,857 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1306 (Array Int Int)) (v_ArrVal_1305 (Array Int Int)) (v_ArrVal_1304 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1304) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1305))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296) (mod (+ c_~sum1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1306) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296)))) is different from false [2023-08-24 03:14:58,867 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:58,868 INFO L351 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 59 treesize of output 48 [2023-08-24 03:14:58,874 INFO L351 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 13686 treesize of output 12918 [2023-08-24 03:14:58,885 INFO L351 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 192 treesize of output 184 [2023-08-24 03:14:58,891 INFO L351 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 89 treesize of output 83 [2023-08-24 03:14:58,901 INFO L351 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 94 treesize of output 82 [2023-08-24 03:15:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-24 03:15:03,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958617008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:15:03,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:15:03,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 03:15:03,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034549062] [2023-08-24 03:15:03,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:15:03,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 03:15:03,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:15:03,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 03:15:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=404, Unknown=8, NotChecked=132, Total=650 [2023-08-24 03:15:03,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:15:03,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 1384 transitions, 24074 flow. Second operand has 26 states, 26 states have (on average 90.07692307692308) internal successors, (2342), 26 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:03,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:15:03,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:15:03,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:15:03,638 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_~sum2~0 c_~sum1~0) (= c_~sum3~0 0) (forall ((v_ArrVal_1306 (Array Int Int))) (= (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1306) c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296))) (<= c_~sum1~0 c_~sum2~0)) is different from false [2023-08-24 03:15:06,663 INFO L124 PetriNetUnfolderBase]: 7394/11099 cut-off events. [2023-08-24 03:15:06,663 INFO L125 PetriNetUnfolderBase]: For 179135/179828 co-relation queries the response was YES. [2023-08-24 03:15:06,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92810 conditions, 11099 events. 7394/11099 cut-off events. For 179135/179828 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 68133 event pairs, 1024 based on Foata normal form. 560/11393 useless extension candidates. Maximal degree in co-relation 92214. Up to 10059 conditions per place. [2023-08-24 03:15:07,017 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 1176 selfloop transitions, 229 changer transitions 1/1440 dead transitions. [2023-08-24 03:15:07,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1440 transitions, 27628 flow [2023-08-24 03:15:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:15:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:15:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 876 transitions. [2023-08-24 03:15:07,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3310657596371882 [2023-08-24 03:15:07,019 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 876 transitions. [2023-08-24 03:15:07,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 876 transitions. [2023-08-24 03:15:07,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:15:07,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 876 transitions. [2023-08-24 03:15:07,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.33333333333333) internal successors, (876), 9 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:07,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:07,023 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:07,023 INFO L175 Difference]: Start difference. First operand has 357 places, 1384 transitions, 24074 flow. Second operand 9 states and 876 transitions. [2023-08-24 03:15:07,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1440 transitions, 27628 flow [2023-08-24 03:15:08,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1440 transitions, 26918 flow, removed 279 selfloop flow, removed 4 redundant places. [2023-08-24 03:15:08,847 INFO L231 Difference]: Finished difference. Result has 364 places, 1408 transitions, 24420 flow [2023-08-24 03:15:08,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=23370, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24420, PETRI_PLACES=364, PETRI_TRANSITIONS=1408} [2023-08-24 03:15:08,849 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 334 predicate places. [2023-08-24 03:15:08,849 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 1408 transitions, 24420 flow [2023-08-24 03:15:08,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 90.07692307692308) internal successors, (2342), 26 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:08,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:15:08,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:15:08,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 03:15:09,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:15:09,050 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:15:09,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:15:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash -333528432, now seen corresponding path program 11 times [2023-08-24 03:15:09,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:15:09,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484345886] [2023-08-24 03:15:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:15:09,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:15:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:15:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:09,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:15:09,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484345886] [2023-08-24 03:15:09,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484345886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:15:09,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651172607] [2023-08-24 03:15:09,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:15:09,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:15:09,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:15:09,970 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) [2023-08-24 03:15:09,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 03:15:10,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:15:10,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:15:10,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-24 03:15:10,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:15:10,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:15:10,298 INFO L351 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 14 treesize of output 16 [2023-08-24 03:15:10,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:15:10,360 INFO L351 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 14 treesize of output 16 [2023-08-24 03:15:10,459 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:10,460 INFO L351 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 24 treesize of output 18 [2023-08-24 03:15:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:15:10,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:15:11,156 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:11,157 INFO L351 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 282 treesize of output 210 [2023-08-24 03:15:11,165 INFO L351 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 45 treesize of output 39 [2023-08-24 03:15:11,172 INFO L351 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 38 [2023-08-24 03:15:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:15:11,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651172607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:15:11,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:15:11,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-24 03:15:11,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345340584] [2023-08-24 03:15:11,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:15:11,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 03:15:11,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:15:11,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 03:15:11,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=915, Unknown=3, NotChecked=0, Total=1122 [2023-08-24 03:15:11,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 03:15:11,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 1408 transitions, 24420 flow. Second operand has 34 states, 34 states have (on average 74.0) internal successors, (2516), 34 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:11,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:15:11,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 03:15:11,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:15:25,685 INFO L124 PetriNetUnfolderBase]: 9728/14568 cut-off events. [2023-08-24 03:15:25,685 INFO L125 PetriNetUnfolderBase]: For 219611/219611 co-relation queries the response was YES. [2023-08-24 03:15:25,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120794 conditions, 14568 events. 9728/14568 cut-off events. For 219611/219611 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 90153 event pairs, 1280 based on Foata normal form. 2/14556 useless extension candidates. Maximal degree in co-relation 119955. Up to 9068 conditions per place. [2023-08-24 03:15:26,053 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 1036 selfloop transitions, 1105 changer transitions 12/2153 dead transitions. [2023-08-24 03:15:26,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 2153 transitions, 39463 flow [2023-08-24 03:15:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-24 03:15:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-24 03:15:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4404 transitions. [2023-08-24 03:15:26,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27235621521335807 [2023-08-24 03:15:26,060 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4404 transitions. [2023-08-24 03:15:26,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4404 transitions. [2023-08-24 03:15:26,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:15:26,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4404 transitions. [2023-08-24 03:15:26,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 80.07272727272728) internal successors, (4404), 55 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:26,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 294.0) internal successors, (16464), 56 states have internal predecessors, (16464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:26,079 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 294.0) internal successors, (16464), 56 states have internal predecessors, (16464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:26,079 INFO L175 Difference]: Start difference. First operand has 364 places, 1408 transitions, 24420 flow. Second operand 55 states and 4404 transitions. [2023-08-24 03:15:26,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 2153 transitions, 39463 flow [2023-08-24 03:15:28,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 2153 transitions, 38978 flow, removed 139 selfloop flow, removed 3 redundant places. [2023-08-24 03:15:28,469 INFO L231 Difference]: Finished difference. Result has 439 places, 1886 transitions, 35562 flow [2023-08-24 03:15:28,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=23947, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=677, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=35562, PETRI_PLACES=439, PETRI_TRANSITIONS=1886} [2023-08-24 03:15:28,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 409 predicate places. [2023-08-24 03:15:28,470 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 1886 transitions, 35562 flow [2023-08-24 03:15:28,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 74.0) internal successors, (2516), 34 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:28,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:15:28,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:15:28,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 03:15:28,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:15:28,671 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:15:28,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:15:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1020019836, now seen corresponding path program 12 times [2023-08-24 03:15:28,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:15:28,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907075802] [2023-08-24 03:15:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:15:28,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:15:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:15:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:29,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:15:29,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907075802] [2023-08-24 03:15:29,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907075802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:15:29,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486181062] [2023-08-24 03:15:29,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:15:29,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:15:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:15:29,416 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) [2023-08-24 03:15:29,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 03:15:29,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:15:29,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:15:29,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 03:15:29,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:15:29,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:15:29,836 INFO L351 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 14 treesize of output 16 [2023-08-24 03:15:29,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:15:29,906 INFO L351 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 14 treesize of output 16 [2023-08-24 03:15:30,082 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:15:30,084 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:30,085 INFO L351 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 10 [2023-08-24 03:15:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:30,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:15:30,412 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:30,412 INFO L351 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 136 treesize of output 104 [2023-08-24 03:15:30,416 INFO L351 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 96 treesize of output 84 [2023-08-24 03:15:30,423 INFO L351 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 44 treesize of output 38 [2023-08-24 03:15:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:31,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486181062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:15:31,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:15:31,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-24 03:15:31,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914773002] [2023-08-24 03:15:31,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:15:31,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 03:15:31,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:15:31,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 03:15:31,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=690, Unknown=3, NotChecked=0, Total=812 [2023-08-24 03:15:31,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 294 [2023-08-24 03:15:31,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1886 transitions, 35562 flow. Second operand has 29 states, 29 states have (on average 78.27586206896552) internal successors, (2270), 29 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:31,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:15:31,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 294 [2023-08-24 03:15:31,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:15:38,679 INFO L124 PetriNetUnfolderBase]: 9990/15018 cut-off events. [2023-08-24 03:15:38,680 INFO L125 PetriNetUnfolderBase]: For 278260/278445 co-relation queries the response was YES. [2023-08-24 03:15:38,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134661 conditions, 15018 events. 9990/15018 cut-off events. For 278260/278445 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 94706 event pairs, 1650 based on Foata normal form. 142/15096 useless extension candidates. Maximal degree in co-relation 134014. Up to 12347 conditions per place. [2023-08-24 03:15:38,908 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 1573 selfloop transitions, 500 changer transitions 10/2145 dead transitions. [2023-08-24 03:15:38,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 2145 transitions, 44119 flow [2023-08-24 03:15:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 03:15:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 03:15:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1208 transitions. [2023-08-24 03:15:38,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.293488824101069 [2023-08-24 03:15:38,910 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1208 transitions. [2023-08-24 03:15:38,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1208 transitions. [2023-08-24 03:15:38,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:15:38,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1208 transitions. [2023-08-24 03:15:38,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.28571428571429) internal successors, (1208), 14 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:38,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 294.0) internal successors, (4410), 15 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:38,914 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 294.0) internal successors, (4410), 15 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:38,914 INFO L175 Difference]: Start difference. First operand has 439 places, 1886 transitions, 35562 flow. Second operand 14 states and 1208 transitions. [2023-08-24 03:15:38,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 2145 transitions, 44119 flow [2023-08-24 03:15:42,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 2145 transitions, 40295 flow, removed 1823 selfloop flow, removed 4 redundant places. [2023-08-24 03:15:42,568 INFO L231 Difference]: Finished difference. Result has 453 places, 1969 transitions, 35414 flow [2023-08-24 03:15:42,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=32352, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=35414, PETRI_PLACES=453, PETRI_TRANSITIONS=1969} [2023-08-24 03:15:42,570 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 423 predicate places. [2023-08-24 03:15:42,570 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1969 transitions, 35414 flow [2023-08-24 03:15:42,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 78.27586206896552) internal successors, (2270), 29 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:42,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:15:42,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:15:42,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 03:15:42,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:15:42,771 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:15:42,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:15:42,772 INFO L85 PathProgramCache]: Analyzing trace with hash 495531016, now seen corresponding path program 13 times [2023-08-24 03:15:42,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:15:42,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702855287] [2023-08-24 03:15:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:15:42,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:15:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:15:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:43,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:15:43,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702855287] [2023-08-24 03:15:43,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702855287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:15:43,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970525673] [2023-08-24 03:15:43,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:15:43,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:15:43,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:15:43,273 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) [2023-08-24 03:15:43,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 03:15:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:15:43,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 03:15:43,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:15:43,484 INFO L351 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 11 treesize of output 7 [2023-08-24 03:15:43,543 INFO L351 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 6 treesize of output 5 [2023-08-24 03:15:43,623 INFO L351 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 6 treesize of output 5 [2023-08-24 03:15:43,701 INFO L351 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 6 treesize of output 5 [2023-08-24 03:15:43,914 INFO L351 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 22 treesize of output 10 [2023-08-24 03:15:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:43,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:15:44,481 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:44,481 INFO L351 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 66 treesize of output 55 [2023-08-24 03:15:44,501 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:44,501 INFO L351 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 1942 treesize of output 1854 [2023-08-24 03:15:44,525 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:44,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 108 [2023-08-24 03:15:44,547 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:44,547 INFO L351 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 99 treesize of output 92 [2023-08-24 03:15:44,569 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:44,570 INFO L351 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 114 treesize of output 91 [2023-08-24 03:15:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:46,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970525673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:15:46,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:15:46,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-08-24 03:15:46,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677486145] [2023-08-24 03:15:46,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:15:46,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 03:15:46,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:15:46,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 03:15:46,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=535, Unknown=4, NotChecked=0, Total=650 [2023-08-24 03:15:46,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 294 [2023-08-24 03:15:46,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1969 transitions, 35414 flow. Second operand has 26 states, 26 states have (on average 78.23076923076923) internal successors, (2034), 26 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:46,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:15:46,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 294 [2023-08-24 03:15:46,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:15:53,557 INFO L124 PetriNetUnfolderBase]: 10352/15568 cut-off events. [2023-08-24 03:15:53,557 INFO L125 PetriNetUnfolderBase]: For 256567/256813 co-relation queries the response was YES. [2023-08-24 03:15:53,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133629 conditions, 15568 events. 10352/15568 cut-off events. For 256567/256813 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 98585 event pairs, 2098 based on Foata normal form. 175/15641 useless extension candidates. Maximal degree in co-relation 133025. Up to 14168 conditions per place. [2023-08-24 03:15:53,959 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 1702 selfloop transitions, 304 changer transitions 2/2070 dead transitions. [2023-08-24 03:15:53,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2070 transitions, 41034 flow [2023-08-24 03:15:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 03:15:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 03:15:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1175 transitions. [2023-08-24 03:15:53,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2854713313896987 [2023-08-24 03:15:53,961 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1175 transitions. [2023-08-24 03:15:53,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1175 transitions. [2023-08-24 03:15:53,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:15:53,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1175 transitions. [2023-08-24 03:15:53,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 83.92857142857143) internal successors, (1175), 14 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:53,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 294.0) internal successors, (4410), 15 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:53,964 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 294.0) internal successors, (4410), 15 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:53,964 INFO L175 Difference]: Start difference. First operand has 453 places, 1969 transitions, 35414 flow. Second operand 14 states and 1175 transitions. [2023-08-24 03:15:53,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 2070 transitions, 41034 flow [2023-08-24 03:15:56,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 2070 transitions, 40291 flow, removed 70 selfloop flow, removed 8 redundant places. [2023-08-24 03:15:57,007 INFO L231 Difference]: Finished difference. Result has 467 places, 2021 transitions, 36695 flow [2023-08-24 03:15:57,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=34671, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=36695, PETRI_PLACES=467, PETRI_TRANSITIONS=2021} [2023-08-24 03:15:57,009 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 437 predicate places. [2023-08-24 03:15:57,009 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 2021 transitions, 36695 flow [2023-08-24 03:15:57,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 78.23076923076923) internal successors, (2034), 26 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:57,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:15:57,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:15:57,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 03:15:57,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-24 03:15:57,211 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:15:57,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:15:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash -373952068, now seen corresponding path program 11 times [2023-08-24 03:15:57,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:15:57,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268558139] [2023-08-24 03:15:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:15:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:15:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:15:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:57,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:15:57,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268558139] [2023-08-24 03:15:57,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268558139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:15:57,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617108719] [2023-08-24 03:15:57,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:15:57,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:15:57,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:15:57,813 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) [2023-08-24 03:15:57,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 03:15:57,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:15:57,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:15:57,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 03:15:57,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:15:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:15:58,149 INFO L351 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 14 treesize of output 16 [2023-08-24 03:15:58,179 INFO L351 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 22 treesize of output 10 [2023-08-24 03:15:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:15:58,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:15:58,311 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1492 (Array Int Int))) (= (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1492) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0) 4294967296))) is different from false [2023-08-24 03:15:58,371 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:58,371 INFO L351 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 56 treesize of output 44 [2023-08-24 03:15:58,375 INFO L351 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 18 treesize of output 16 [2023-08-24 03:15:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-24 03:15:58,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617108719] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:15:58,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:15:58,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-08-24 03:15:58,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827807816] [2023-08-24 03:15:58,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:15:58,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 03:15:58,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:15:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 03:15:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=4, NotChecked=40, Total=506 [2023-08-24 03:15:58,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:15:58,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 2021 transitions, 36695 flow. Second operand has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 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) [2023-08-24 03:15:58,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:15:58,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:15:58,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:16:05,328 INFO L124 PetriNetUnfolderBase]: 10145/15221 cut-off events. [2023-08-24 03:16:05,328 INFO L125 PetriNetUnfolderBase]: For 287386/288635 co-relation queries the response was YES. [2023-08-24 03:16:05,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135244 conditions, 15221 events. 10145/15221 cut-off events. For 287386/288635 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 97554 event pairs, 1617 based on Foata normal form. 730/15530 useless extension candidates. Maximal degree in co-relation 134620. Up to 14002 conditions per place. [2023-08-24 03:16:05,942 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1751 selfloop transitions, 241 changer transitions 1/2055 dead transitions. [2023-08-24 03:16:05,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 2055 transitions, 41177 flow [2023-08-24 03:16:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:16:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:16:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 779 transitions. [2023-08-24 03:16:05,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312074829931973 [2023-08-24 03:16:05,944 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 779 transitions. [2023-08-24 03:16:05,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 779 transitions. [2023-08-24 03:16:05,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:16:05,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 779 transitions. [2023-08-24 03:16:05,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.375) internal successors, (779), 8 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:05,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:05,946 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:05,946 INFO L175 Difference]: Start difference. First operand has 467 places, 2021 transitions, 36695 flow. Second operand 8 states and 779 transitions. [2023-08-24 03:16:05,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 2055 transitions, 41177 flow [2023-08-24 03:16:08,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 2055 transitions, 40848 flow, removed 134 selfloop flow, removed 4 redundant places. [2023-08-24 03:16:08,922 INFO L231 Difference]: Finished difference. Result has 471 places, 2025 transitions, 37040 flow [2023-08-24 03:16:08,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=36366, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=37040, PETRI_PLACES=471, PETRI_TRANSITIONS=2025} [2023-08-24 03:16:08,924 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 441 predicate places. [2023-08-24 03:16:08,924 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 2025 transitions, 37040 flow [2023-08-24 03:16:08,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 90.3913043478261) internal successors, (2079), 23 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) [2023-08-24 03:16:08,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:16:08,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:16:08,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 03:16:09,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:16:09,131 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:16:09,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:16:09,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2031439576, now seen corresponding path program 12 times [2023-08-24 03:16:09,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:16:09,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550651293] [2023-08-24 03:16:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:16:09,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:16:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:16:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:16:09,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:16:09,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550651293] [2023-08-24 03:16:09,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550651293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:16:09,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958961674] [2023-08-24 03:16:09,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:16:09,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:16:09,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:16:09,685 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) [2023-08-24 03:16:09,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 03:16:09,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:16:09,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:16:09,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:16:09,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:16:09,905 INFO L351 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 11 treesize of output 7 [2023-08-24 03:16:09,947 INFO L351 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 6 treesize of output 5 [2023-08-24 03:16:09,995 INFO L351 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 6 treesize of output 5 [2023-08-24 03:16:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:16:10,168 INFO L351 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 14 treesize of output 16 [2023-08-24 03:16:10,210 INFO L351 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 22 treesize of output 10 [2023-08-24 03:16:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:16:10,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:16:10,326 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1541 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1541) c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork1_~i~1 4)))) 4294967296) (mod c_~sum1~0 4294967296))) is different from false [2023-08-24 03:16:10,508 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1541 (Array Int Int)) (v_ArrVal_1540 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1540))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1541) c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296)))) is different from false [2023-08-24 03:16:10,539 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1541 (Array Int Int)) (v_ArrVal_1540 (Array Int Int)) (v_ArrVal_1539 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1539) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1540))) (= (mod (+ c_~sum3~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1541) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|) c_~sum2~0) 4294967296) (mod (+ c_~sum1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296)))) is different from false [2023-08-24 03:16:10,548 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:16:10,549 INFO L351 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 59 treesize of output 48 [2023-08-24 03:16:10,553 INFO L351 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 6838 treesize of output 6454 [2023-08-24 03:16:10,563 INFO L351 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 192 treesize of output 184 [2023-08-24 03:16:10,568 INFO L351 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 89 treesize of output 83 [2023-08-24 03:16:10,576 INFO L351 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 94 treesize of output 82 [2023-08-24 03:16:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-24 03:16:14,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958961674] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:16:14,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:16:14,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-24 03:16:14,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344231491] [2023-08-24 03:16:14,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:16:14,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 03:16:14,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:16:14,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 03:16:14,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=435, Unknown=7, NotChecked=138, Total=702 [2023-08-24 03:16:14,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:16:14,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 2025 transitions, 37040 flow. Second operand has 27 states, 27 states have (on average 90.03703703703704) internal successors, (2431), 27 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:14,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:16:14,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:16:14,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:16:14,653 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_~sum2~0 c_~sum1~0) (forall ((v_ArrVal_1541 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1541) c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296))) (= c_~sum3~0 0) (<= c_~sum1~0 c_~sum2~0)) is different from false [2023-08-24 03:16:21,132 INFO L124 PetriNetUnfolderBase]: 10476/15711 cut-off events. [2023-08-24 03:16:21,132 INFO L125 PetriNetUnfolderBase]: For 307108/308591 co-relation queries the response was YES. [2023-08-24 03:16:21,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139539 conditions, 15711 events. 10476/15711 cut-off events. For 307108/308591 co-relation queries the response was YES. Maximal size of possible extension queue 1035. Compared 101105 event pairs, 1766 based on Foata normal form. 724/16015 useless extension candidates. Maximal degree in co-relation 138904. Up to 14441 conditions per place. [2023-08-24 03:16:21,421 INFO L140 encePairwiseOnDemand]: 278/294 looper letters, 1737 selfloop transitions, 317 changer transitions 1/2117 dead transitions. [2023-08-24 03:16:21,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 2117 transitions, 42729 flow [2023-08-24 03:16:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:16:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:16:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 880 transitions. [2023-08-24 03:16:21,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3325774754346183 [2023-08-24 03:16:21,424 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 880 transitions. [2023-08-24 03:16:21,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 880 transitions. [2023-08-24 03:16:21,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:16:21,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 880 transitions. [2023-08-24 03:16:21,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.77777777777777) internal successors, (880), 9 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:21,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:21,427 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:21,427 INFO L175 Difference]: Start difference. First operand has 471 places, 2025 transitions, 37040 flow. Second operand 9 states and 880 transitions. [2023-08-24 03:16:21,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 2117 transitions, 42729 flow [2023-08-24 03:16:24,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 2117 transitions, 42169 flow, removed 50 selfloop flow, removed 6 redundant places. [2023-08-24 03:16:24,661 INFO L231 Difference]: Finished difference. Result has 476 places, 2080 transitions, 38560 flow [2023-08-24 03:16:24,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=36480, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=38560, PETRI_PLACES=476, PETRI_TRANSITIONS=2080} [2023-08-24 03:16:24,663 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 446 predicate places. [2023-08-24 03:16:24,663 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 2080 transitions, 38560 flow [2023-08-24 03:16:24,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.03703703703704) internal successors, (2431), 27 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:24,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:16:24,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:16:24,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 03:16:24,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:16:24,871 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:16:24,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:16:24,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1994484204, now seen corresponding path program 13 times [2023-08-24 03:16:24,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:16:24,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517284174] [2023-08-24 03:16:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:16:24,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:16:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:16:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:16:25,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:16:25,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517284174] [2023-08-24 03:16:25,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517284174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:16:25,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73075704] [2023-08-24 03:16:25,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:16:25,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:16:25,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:16:25,222 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) [2023-08-24 03:16:25,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 03:16:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:16:25,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:16:25,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:16:25,397 INFO L351 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 11 treesize of output 7 [2023-08-24 03:16:25,441 INFO L351 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 6 treesize of output 5 [2023-08-24 03:16:25,497 INFO L351 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 6 treesize of output 5 [2023-08-24 03:16:25,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:16:25,649 INFO L351 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 14 treesize of output 16 [2023-08-24 03:16:25,665 INFO L351 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 22 treesize of output 10 [2023-08-24 03:16:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:16:25,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:16:26,160 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:16:26,161 INFO L351 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 59 treesize of output 48 [2023-08-24 03:16:26,177 INFO L351 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 3414 treesize of output 3222 [2023-08-24 03:16:26,190 INFO L351 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 192 treesize of output 184 [2023-08-24 03:16:26,200 INFO L351 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 94 treesize of output 88 [2023-08-24 03:16:26,204 INFO L351 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 178 treesize of output 166 [2023-08-24 03:16:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:16:27,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73075704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:16:27,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:16:27,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-08-24 03:16:27,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835230113] [2023-08-24 03:16:27,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:16:27,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 03:16:27,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:16:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 03:16:27,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=491, Unknown=24, NotChecked=0, Total=650 [2023-08-24 03:16:27,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:16:27,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 2080 transitions, 38560 flow. Second operand has 26 states, 26 states have (on average 90.53846153846153) internal successors, (2354), 26 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:27,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:16:27,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:16:27,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:16:27,732 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_~sum2~0 c_~sum1~0) (forall ((v_ArrVal_1589 (Array Int Int)) (v_ArrVal_1590 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1589))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1590) c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296)))) (= c_~sum3~0 0) (forall ((v_ArrVal_1590 (Array Int Int))) (= (mod (+ c_~sum3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1590) c_~A~0.base) c_~A~0.offset) c_~sum2~0) 4294967296) (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296))) (<= c_~sum1~0 c_~sum2~0)) is different from false [2023-08-24 03:16:34,767 INFO L124 PetriNetUnfolderBase]: 10623/15931 cut-off events. [2023-08-24 03:16:34,767 INFO L125 PetriNetUnfolderBase]: For 330836/332640 co-relation queries the response was YES. [2023-08-24 03:16:34,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147243 conditions, 15931 events. 10623/15931 cut-off events. For 330836/332640 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 102776 event pairs, 1849 based on Foata normal form. 789/16296 useless extension candidates. Maximal degree in co-relation 146623. Up to 14384 conditions per place. [2023-08-24 03:16:35,006 INFO L140 encePairwiseOnDemand]: 278/294 looper letters, 1730 selfloop transitions, 333 changer transitions 1/2126 dead transitions. [2023-08-24 03:16:35,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 2126 transitions, 43429 flow [2023-08-24 03:16:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:16:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:16:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 880 transitions. [2023-08-24 03:16:35,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3325774754346183 [2023-08-24 03:16:35,008 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 880 transitions. [2023-08-24 03:16:35,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 880 transitions. [2023-08-24 03:16:35,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:16:35,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 880 transitions. [2023-08-24 03:16:35,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.77777777777777) internal successors, (880), 9 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:35,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:35,010 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:35,010 INFO L175 Difference]: Start difference. First operand has 476 places, 2080 transitions, 38560 flow. Second operand 9 states and 880 transitions. [2023-08-24 03:16:35,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 2126 transitions, 43429 flow [2023-08-24 03:16:38,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 2126 transitions, 42556 flow, removed 323 selfloop flow, removed 4 redundant places. [2023-08-24 03:16:38,216 INFO L231 Difference]: Finished difference. Result has 481 places, 2089 transitions, 38694 flow [2023-08-24 03:16:38,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=37687, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=38694, PETRI_PLACES=481, PETRI_TRANSITIONS=2089} [2023-08-24 03:16:38,217 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 451 predicate places. [2023-08-24 03:16:38,218 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 2089 transitions, 38694 flow [2023-08-24 03:16:38,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 90.53846153846153) internal successors, (2354), 26 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:38,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:16:38,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:16:38,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 03:16:38,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 03:16:38,419 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:16:38,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:16:38,419 INFO L85 PathProgramCache]: Analyzing trace with hash 736861342, now seen corresponding path program 14 times [2023-08-24 03:16:38,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:16:38,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462066792] [2023-08-24 03:16:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:16:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:16:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:16:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:16:39,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:16:39,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462066792] [2023-08-24 03:16:39,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462066792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:16:39,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890577904] [2023-08-24 03:16:39,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:16:39,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:16:39,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:16:39,041 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) [2023-08-24 03:16:39,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 03:16:39,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:16:39,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:16:39,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:16:39,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:16:39,247 INFO L351 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 11 treesize of output 7 [2023-08-24 03:16:39,294 INFO L351 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 6 treesize of output 5 [2023-08-24 03:16:39,333 INFO L351 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 6 treesize of output 5 [2023-08-24 03:16:39,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:16:39,482 INFO L351 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 14 treesize of output 16 [2023-08-24 03:16:39,521 INFO L351 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 22 treesize of output 10 [2023-08-24 03:16:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:16:39,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:16:39,676 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1639 (Array Int Int))) (= (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1639) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork1_~i~1 4)))) 4294967296))) is different from false [2023-08-24 03:16:39,683 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1639 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork1_~i~1 4)))) 4294967296) (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1639) c_~A~0.base) c_~A~0.offset)) 4294967296))) is different from false [2023-08-24 03:16:39,731 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1639 (Array Int Int)) (v_ArrVal_1638 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1638))) (= (mod (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1639) c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296) (mod (+ c_~sum3~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~sum2~0) 4294967296)))) is different from false [2023-08-24 03:16:39,800 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:16:39,800 INFO L351 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 59 treesize of output 48 [2023-08-24 03:16:39,805 INFO L351 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 3414 treesize of output 3222 [2023-08-24 03:16:39,812 INFO L351 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 93 treesize of output 87 [2023-08-24 03:16:39,817 INFO L351 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 186 treesize of output 178 [2023-08-24 03:16:39,825 INFO L351 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 94 treesize of output 82 [2023-08-24 03:16:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 03:16:46,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890577904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:16:46,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:16:46,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-24 03:16:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625156338] [2023-08-24 03:16:46,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:16:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 03:16:46,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:16:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 03:16:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=428, Unknown=13, NotChecked=138, Total=702 [2023-08-24 03:16:46,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 294 [2023-08-24 03:16:46,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 2089 transitions, 38694 flow. Second operand has 27 states, 27 states have (on average 90.03703703703704) internal successors, (2431), 27 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:46,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:16:46,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 294 [2023-08-24 03:16:46,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:16:53,897 INFO L124 PetriNetUnfolderBase]: 10784/16175 cut-off events. [2023-08-24 03:16:53,898 INFO L125 PetriNetUnfolderBase]: For 332895/334667 co-relation queries the response was YES. [2023-08-24 03:16:54,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149150 conditions, 16175 events. 10784/16175 cut-off events. For 332895/334667 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 104764 event pairs, 1845 based on Foata normal form. 756/16479 useless extension candidates. Maximal degree in co-relation 148518. Up to 15252 conditions per place. [2023-08-24 03:16:54,676 INFO L140 encePairwiseOnDemand]: 284/294 looper letters, 1875 selfloop transitions, 205 changer transitions 2/2144 dead transitions. [2023-08-24 03:16:54,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 2144 transitions, 43669 flow [2023-08-24 03:16:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:16:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:16:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 879 transitions. [2023-08-24 03:16:54,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3321995464852608 [2023-08-24 03:16:54,679 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 879 transitions. [2023-08-24 03:16:54,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 879 transitions. [2023-08-24 03:16:54,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:16:54,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 879 transitions. [2023-08-24 03:16:54,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.66666666666667) internal successors, (879), 9 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:54,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:54,682 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:54,682 INFO L175 Difference]: Start difference. First operand has 481 places, 2089 transitions, 38694 flow. Second operand 9 states and 879 transitions. [2023-08-24 03:16:54,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 2144 transitions, 43669 flow [2023-08-24 03:16:57,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 2144 transitions, 42889 flow, removed 91 selfloop flow, removed 7 redundant places. [2023-08-24 03:16:57,936 INFO L231 Difference]: Finished difference. Result has 483 places, 2099 transitions, 38623 flow [2023-08-24 03:16:57,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=37914, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=38623, PETRI_PLACES=483, PETRI_TRANSITIONS=2099} [2023-08-24 03:16:57,938 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 453 predicate places. [2023-08-24 03:16:57,938 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 2099 transitions, 38623 flow [2023-08-24 03:16:57,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.03703703703704) internal successors, (2431), 27 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:57,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:16:57,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:16:57,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 03:16:58,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 03:16:58,139 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:16:58,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:16:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1305162541, now seen corresponding path program 14 times [2023-08-24 03:16:58,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:16:58,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468759035] [2023-08-24 03:16:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:16:58,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:16:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:16:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:16:58,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:16:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468759035] [2023-08-24 03:16:58,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468759035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:16:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766246390] [2023-08-24 03:16:58,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:16:58,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:16:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:16:58,253 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) [2023-08-24 03:16:58,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 03:16:58,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:16:58,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:16:58,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:16:58,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:16:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:16:58,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:16:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:16:58,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766246390] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:16:58,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:16:58,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-24 03:16:58,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662287523] [2023-08-24 03:16:58,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:16:58,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 03:16:58,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:16:58,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 03:16:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-24 03:16:58,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 294 [2023-08-24 03:16:58,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 2099 transitions, 38623 flow. Second operand has 15 states, 15 states have (on average 117.8) internal successors, (1767), 15 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:58,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:16:58,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 294 [2023-08-24 03:16:58,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:17:06,318 INFO L124 PetriNetUnfolderBase]: 12460/18392 cut-off events. [2023-08-24 03:17:06,318 INFO L125 PetriNetUnfolderBase]: For 443504/446942 co-relation queries the response was YES. [2023-08-24 03:17:06,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169565 conditions, 18392 events. 12460/18392 cut-off events. For 443504/446942 co-relation queries the response was YES. Maximal size of possible extension queue 1341. Compared 120238 event pairs, 2875 based on Foata normal form. 1961/19415 useless extension candidates. Maximal degree in co-relation 168739. Up to 12252 conditions per place. [2023-08-24 03:17:06,736 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 2248 selfloop transitions, 233 changer transitions 2/2603 dead transitions. [2023-08-24 03:17:06,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 2603 transitions, 50105 flow [2023-08-24 03:17:06,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:17:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:17:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 985 transitions. [2023-08-24 03:17:06,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187925170068027 [2023-08-24 03:17:06,738 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 985 transitions. [2023-08-24 03:17:06,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 985 transitions. [2023-08-24 03:17:06,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:17:06,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 985 transitions. [2023-08-24 03:17:06,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.125) internal successors, (985), 8 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:06,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:06,742 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:06,742 INFO L175 Difference]: Start difference. First operand has 483 places, 2099 transitions, 38623 flow. Second operand 8 states and 985 transitions. [2023-08-24 03:17:06,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 2603 transitions, 50105 flow [2023-08-24 03:17:10,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 2603 transitions, 49307 flow, removed 200 selfloop flow, removed 7 redundant places. [2023-08-24 03:17:10,244 INFO L231 Difference]: Finished difference. Result has 486 places, 2053 transitions, 37694 flow [2023-08-24 03:17:10,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=35666, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=37694, PETRI_PLACES=486, PETRI_TRANSITIONS=2053} [2023-08-24 03:17:10,247 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 456 predicate places. [2023-08-24 03:17:10,247 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 2053 transitions, 37694 flow [2023-08-24 03:17:10,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 117.8) internal successors, (1767), 15 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:10,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:17:10,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:17:10,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 03:17:10,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 03:17:10,453 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:17:10,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:17:10,454 INFO L85 PathProgramCache]: Analyzing trace with hash 812013338, now seen corresponding path program 15 times [2023-08-24 03:17:10,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:17:10,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024099253] [2023-08-24 03:17:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:17:10,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:17:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:17:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:10,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:17:10,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024099253] [2023-08-24 03:17:10,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024099253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:17:10,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344078173] [2023-08-24 03:17:10,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:17:10,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:17:10,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:17:10,518 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) [2023-08-24 03:17:10,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 03:17:10,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:17:10,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:17:10,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:17:10,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:17:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:10,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:17:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:10,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344078173] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:17:10,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:17:10,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 03:17:10,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107535500] [2023-08-24 03:17:10,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:17:10,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 03:17:10,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:17:10,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 03:17:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-24 03:17:10,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 294 [2023-08-24 03:17:10,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 2053 transitions, 37694 flow. Second operand has 14 states, 14 states have (on average 117.57142857142857) internal successors, (1646), 14 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:10,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:17:10,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 294 [2023-08-24 03:17:10,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:17:17,467 INFO L124 PetriNetUnfolderBase]: 10295/15630 cut-off events. [2023-08-24 03:17:17,467 INFO L125 PetriNetUnfolderBase]: For 399868/402781 co-relation queries the response was YES. [2023-08-24 03:17:17,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148065 conditions, 15630 events. 10295/15630 cut-off events. For 399868/402781 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 105447 event pairs, 2361 based on Foata normal form. 1842/16715 useless extension candidates. Maximal degree in co-relation 147446. Up to 6606 conditions per place. [2023-08-24 03:17:17,766 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 1766 selfloop transitions, 170 changer transitions 40/2092 dead transitions. [2023-08-24 03:17:17,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 2092 transitions, 42587 flow [2023-08-24 03:17:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 03:17:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 03:17:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 868 transitions. [2023-08-24 03:17:17,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2023-08-24 03:17:17,768 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 868 transitions. [2023-08-24 03:17:17,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 868 transitions. [2023-08-24 03:17:17,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:17:17,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 868 transitions. [2023-08-24 03:17:17,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:17,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:17:17,770 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:17:17,770 INFO L175 Difference]: Start difference. First operand has 486 places, 2053 transitions, 37694 flow. Second operand 7 states and 868 transitions. [2023-08-24 03:17:17,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 2092 transitions, 42587 flow [2023-08-24 03:17:20,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 2092 transitions, 42318 flow, removed 103 selfloop flow, removed 6 redundant places. [2023-08-24 03:17:20,681 INFO L231 Difference]: Finished difference. Result has 480 places, 1793 transitions, 34463 flow [2023-08-24 03:17:20,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=34366, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=34463, PETRI_PLACES=480, PETRI_TRANSITIONS=1793} [2023-08-24 03:17:20,683 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 450 predicate places. [2023-08-24 03:17:20,683 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 1793 transitions, 34463 flow [2023-08-24 03:17:20,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 117.57142857142857) internal successors, (1646), 14 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:20,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:17:20,683 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:17:20,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 03:17:20,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 03:17:20,889 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:17:20,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:17:20,890 INFO L85 PathProgramCache]: Analyzing trace with hash -442254462, now seen corresponding path program 16 times [2023-08-24 03:17:20,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:17:20,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144880887] [2023-08-24 03:17:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:17:20,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:17:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:17:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:21,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:17:21,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144880887] [2023-08-24 03:17:21,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144880887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:17:21,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391907652] [2023-08-24 03:17:21,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:17:21,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:17:21,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:17:21,077 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) [2023-08-24 03:17:21,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 03:17:21,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:17:21,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:17:21,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 03:17:21,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:17:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:21,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:17:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:21,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391907652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:17:21,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:17:21,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 17 [2023-08-24 03:17:21,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157377936] [2023-08-24 03:17:21,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:17:21,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 03:17:21,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:17:21,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 03:17:21,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-08-24 03:17:21,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 294 [2023-08-24 03:17:21,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 1793 transitions, 34463 flow. Second operand has 17 states, 17 states have (on average 107.58823529411765) internal successors, (1829), 17 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:21,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:17:21,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 294 [2023-08-24 03:17:21,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:17:28,288 INFO L124 PetriNetUnfolderBase]: 9746/15201 cut-off events. [2023-08-24 03:17:28,288 INFO L125 PetriNetUnfolderBase]: For 317362/317362 co-relation queries the response was YES. [2023-08-24 03:17:28,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139846 conditions, 15201 events. 9746/15201 cut-off events. For 317362/317362 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 102923 event pairs, 1624 based on Foata normal form. 782/15977 useless extension candidates. Maximal degree in co-relation 139285. Up to 5361 conditions per place. [2023-08-24 03:17:28,573 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1440 selfloop transitions, 653 changer transitions 154/2247 dead transitions. [2023-08-24 03:17:28,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 2247 transitions, 46175 flow [2023-08-24 03:17:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 03:17:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 03:17:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1826 transitions. [2023-08-24 03:17:28,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38818027210884354 [2023-08-24 03:17:28,575 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1826 transitions. [2023-08-24 03:17:28,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1826 transitions. [2023-08-24 03:17:28,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:17:28,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1826 transitions. [2023-08-24 03:17:28,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 114.125) internal successors, (1826), 16 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:28,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 294.0) internal successors, (4998), 17 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:28,581 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 294.0) internal successors, (4998), 17 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:28,581 INFO L175 Difference]: Start difference. First operand has 480 places, 1793 transitions, 34463 flow. Second operand 16 states and 1826 transitions. [2023-08-24 03:17:28,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 2247 transitions, 46175 flow [2023-08-24 03:17:31,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 2247 transitions, 45287 flow, removed 191 selfloop flow, removed 8 redundant places. [2023-08-24 03:17:31,910 INFO L231 Difference]: Finished difference. Result has 496 places, 1737 transitions, 34532 flow [2023-08-24 03:17:31,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=33351, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=34532, PETRI_PLACES=496, PETRI_TRANSITIONS=1737} [2023-08-24 03:17:31,911 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 466 predicate places. [2023-08-24 03:17:31,912 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 1737 transitions, 34532 flow [2023-08-24 03:17:31,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.58823529411765) internal successors, (1829), 17 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:31,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:17:31,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:17:31,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-24 03:17:32,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:17:32,117 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:17:32,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:17:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1307022612, now seen corresponding path program 1 times [2023-08-24 03:17:32,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:17:32,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494706832] [2023-08-24 03:17:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:17:32,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:17:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:17:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:32,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:17:32,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494706832] [2023-08-24 03:17:32,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494706832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:17:32,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092038716] [2023-08-24 03:17:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:17:32,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:17:32,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:17:32,202 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) [2023-08-24 03:17:32,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 03:17:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:17:32,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 03:17:32,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:17:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:32,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:17:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:32,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092038716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:17:32,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:17:32,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 03:17:32,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168985097] [2023-08-24 03:17:32,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:17:32,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 03:17:32,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:17:32,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 03:17:32,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-08-24 03:17:32,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:17:32,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 1737 transitions, 34532 flow. Second operand has 16 states, 16 states have (on average 108.1875) internal successors, (1731), 16 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:32,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:17:32,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:17:32,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:17:38,828 INFO L124 PetriNetUnfolderBase]: 8884/14061 cut-off events. [2023-08-24 03:17:38,828 INFO L125 PetriNetUnfolderBase]: For 332211/332258 co-relation queries the response was YES. [2023-08-24 03:17:39,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135193 conditions, 14061 events. 8884/14061 cut-off events. For 332211/332258 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 97354 event pairs, 1858 based on Foata normal form. 403/14435 useless extension candidates. Maximal degree in co-relation 135013. Up to 6010 conditions per place. [2023-08-24 03:17:39,194 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1527 selfloop transitions, 231 changer transitions 145/1960 dead transitions. [2023-08-24 03:17:39,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1960 transitions, 41365 flow [2023-08-24 03:17:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 03:17:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 03:17:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1158 transitions. [2023-08-24 03:17:39,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39387755102040817 [2023-08-24 03:17:39,197 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1158 transitions. [2023-08-24 03:17:39,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1158 transitions. [2023-08-24 03:17:39,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:17:39,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1158 transitions. [2023-08-24 03:17:39,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 115.8) internal successors, (1158), 10 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:39,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:39,200 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:39,200 INFO L175 Difference]: Start difference. First operand has 496 places, 1737 transitions, 34532 flow. Second operand 10 states and 1158 transitions. [2023-08-24 03:17:39,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1960 transitions, 41365 flow [2023-08-24 03:17:42,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1960 transitions, 40256 flow, removed 103 selfloop flow, removed 13 redundant places. [2023-08-24 03:17:42,862 INFO L231 Difference]: Finished difference. Result has 492 places, 1665 transitions, 32748 flow [2023-08-24 03:17:42,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=33053, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=32748, PETRI_PLACES=492, PETRI_TRANSITIONS=1665} [2023-08-24 03:17:42,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 462 predicate places. [2023-08-24 03:17:42,863 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 1665 transitions, 32748 flow [2023-08-24 03:17:42,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.1875) internal successors, (1731), 16 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:42,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:17:42,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:17:42,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-24 03:17:43,064 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,SelfDestructingSolverStorable41 [2023-08-24 03:17:43,064 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:17:43,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:17:43,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1979825874, now seen corresponding path program 2 times [2023-08-24 03:17:43,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:17:43,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806331798] [2023-08-24 03:17:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:17:43,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:17:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:17:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:43,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:17:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806331798] [2023-08-24 03:17:43,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806331798] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:17:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985524882] [2023-08-24 03:17:43,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:17:43,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:17:43,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:17:43,154 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) [2023-08-24 03:17:43,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 03:17:43,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:17:43,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:17:43,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 03:17:43,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:17:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:43,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:17:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:43,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985524882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:17:43,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:17:43,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 03:17:43,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543398065] [2023-08-24 03:17:43,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:17:43,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 03:17:43,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:17:43,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 03:17:43,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-24 03:17:43,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:17:43,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1665 transitions, 32748 flow. Second operand has 18 states, 18 states have (on average 108.05555555555556) internal successors, (1945), 18 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:43,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:17:43,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:17:43,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:17:48,940 INFO L124 PetriNetUnfolderBase]: 8004/12225 cut-off events. [2023-08-24 03:17:48,941 INFO L125 PetriNetUnfolderBase]: For 313178/313228 co-relation queries the response was YES. [2023-08-24 03:17:49,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122812 conditions, 12225 events. 8004/12225 cut-off events. For 313178/313228 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 77359 event pairs, 1885 based on Foata normal form. 203/12399 useless extension candidates. Maximal degree in co-relation 122631. Up to 6012 conditions per place. [2023-08-24 03:17:49,125 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1519 selfloop transitions, 310 changer transitions 53/1938 dead transitions. [2023-08-24 03:17:49,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1938 transitions, 40587 flow [2023-08-24 03:17:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 03:17:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 03:17:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1489 transitions. [2023-08-24 03:17:49,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38958660387231814 [2023-08-24 03:17:49,127 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1489 transitions. [2023-08-24 03:17:49,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1489 transitions. [2023-08-24 03:17:49,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:17:49,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1489 transitions. [2023-08-24 03:17:49,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 114.53846153846153) internal successors, (1489), 13 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:49,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:49,131 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:49,131 INFO L175 Difference]: Start difference. First operand has 492 places, 1665 transitions, 32748 flow. Second operand 13 states and 1489 transitions. [2023-08-24 03:17:49,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1938 transitions, 40587 flow [2023-08-24 03:17:52,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1938 transitions, 39570 flow, removed 263 selfloop flow, removed 12 redundant places. [2023-08-24 03:17:52,217 INFO L231 Difference]: Finished difference. Result has 491 places, 1697 transitions, 33453 flow [2023-08-24 03:17:52,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=31669, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=33453, PETRI_PLACES=491, PETRI_TRANSITIONS=1697} [2023-08-24 03:17:52,219 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 461 predicate places. [2023-08-24 03:17:52,219 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 1697 transitions, 33453 flow [2023-08-24 03:17:52,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.05555555555556) internal successors, (1945), 18 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:52,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:17:52,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:17:52,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 03:17:52,426 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,SelfDestructingSolverStorable42 [2023-08-24 03:17:52,426 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:17:52,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:17:52,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110454, now seen corresponding path program 3 times [2023-08-24 03:17:52,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:17:52,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051699352] [2023-08-24 03:17:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:17:52,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:17:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:17:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:52,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:17:52,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051699352] [2023-08-24 03:17:52,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051699352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:17:52,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853672137] [2023-08-24 03:17:52,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:17:52,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:17:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:17:52,510 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) [2023-08-24 03:17:52,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 03:17:52,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:17:52,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:17:52,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 03:17:52,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:17:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:52,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:17:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:52,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853672137] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:17:52,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:17:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 03:17:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952384253] [2023-08-24 03:17:52,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:17:52,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 03:17:52,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:17:52,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 03:17:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-24 03:17:52,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:17:52,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 1697 transitions, 33453 flow. Second operand has 17 states, 17 states have (on average 108.29411764705883) internal successors, (1841), 17 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:52,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:17:52,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:17:52,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:17:58,192 INFO L124 PetriNetUnfolderBase]: 7661/11881 cut-off events. [2023-08-24 03:17:58,193 INFO L125 PetriNetUnfolderBase]: For 293652/293704 co-relation queries the response was YES. [2023-08-24 03:17:58,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119003 conditions, 11881 events. 7661/11881 cut-off events. For 293652/293704 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 76924 event pairs, 1873 based on Foata normal form. 289/12147 useless extension candidates. Maximal degree in co-relation 118825. Up to 6012 conditions per place. [2023-08-24 03:17:58,391 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1489 selfloop transitions, 209 changer transitions 74/1828 dead transitions. [2023-08-24 03:17:58,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 1828 transitions, 38665 flow [2023-08-24 03:17:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 03:17:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 03:17:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1149 transitions. [2023-08-24 03:17:58,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39081632653061227 [2023-08-24 03:17:58,393 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1149 transitions. [2023-08-24 03:17:58,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1149 transitions. [2023-08-24 03:17:58,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:17:58,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1149 transitions. [2023-08-24 03:17:58,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 114.9) internal successors, (1149), 10 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:58,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:58,395 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:58,395 INFO L175 Difference]: Start difference. First operand has 491 places, 1697 transitions, 33453 flow. Second operand 10 states and 1149 transitions. [2023-08-24 03:17:58,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 1828 transitions, 38665 flow [2023-08-24 03:18:01,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1828 transitions, 38409 flow, removed 62 selfloop flow, removed 6 redundant places. [2023-08-24 03:18:01,282 INFO L231 Difference]: Finished difference. Result has 493 places, 1607 transitions, 31622 flow [2023-08-24 03:18:01,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=32108, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=31622, PETRI_PLACES=493, PETRI_TRANSITIONS=1607} [2023-08-24 03:18:01,283 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 463 predicate places. [2023-08-24 03:18:01,283 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1607 transitions, 31622 flow [2023-08-24 03:18:01,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 108.29411764705883) internal successors, (1841), 17 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:01,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:18:01,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:18:01,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 03:18:01,484 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,SelfDestructingSolverStorable43 [2023-08-24 03:18:01,484 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:18:01,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:18:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1533521148, now seen corresponding path program 4 times [2023-08-24 03:18:01,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:18:01,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42391750] [2023-08-24 03:18:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:18:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:18:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:01,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:18:01,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42391750] [2023-08-24 03:18:01,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42391750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:18:01,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655385038] [2023-08-24 03:18:01,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:18:01,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:01,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:18:01,564 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) [2023-08-24 03:18:01,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 03:18:01,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:18:01,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:18:01,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 03:18:01,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:18:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:01,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:18:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:01,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655385038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:18:01,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:18:01,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2023-08-24 03:18:01,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604103532] [2023-08-24 03:18:01,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:18:01,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 03:18:01,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:18:01,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 03:18:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-24 03:18:01,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 03:18:01,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1607 transitions, 31622 flow. Second operand has 14 states, 14 states have (on average 104.14285714285714) internal successors, (1458), 14 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:01,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:18:01,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 03:18:01,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:18:06,998 INFO L124 PetriNetUnfolderBase]: 7790/11921 cut-off events. [2023-08-24 03:18:06,998 INFO L125 PetriNetUnfolderBase]: For 304626/304626 co-relation queries the response was YES. [2023-08-24 03:18:07,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119887 conditions, 11921 events. 7790/11921 cut-off events. For 304626/304626 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 75205 event pairs, 896 based on Foata normal form. 206/12121 useless extension candidates. Maximal degree in co-relation 119710. Up to 3506 conditions per place. [2023-08-24 03:18:07,201 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 1225 selfloop transitions, 610 changer transitions 62/1897 dead transitions. [2023-08-24 03:18:07,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 1897 transitions, 40103 flow [2023-08-24 03:18:07,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 03:18:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 03:18:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2613 transitions. [2023-08-24 03:18:07,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3703231292517007 [2023-08-24 03:18:07,204 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2613 transitions. [2023-08-24 03:18:07,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2613 transitions. [2023-08-24 03:18:07,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:18:07,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2613 transitions. [2023-08-24 03:18:07,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 108.875) internal successors, (2613), 24 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:07,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 294.0) internal successors, (7350), 25 states have internal predecessors, (7350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:07,209 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 294.0) internal successors, (7350), 25 states have internal predecessors, (7350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:07,209 INFO L175 Difference]: Start difference. First operand has 493 places, 1607 transitions, 31622 flow. Second operand 24 states and 2613 transitions. [2023-08-24 03:18:07,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 1897 transitions, 40103 flow [2023-08-24 03:18:10,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1897 transitions, 39248 flow, removed 136 selfloop flow, removed 11 redundant places. [2023-08-24 03:18:10,131 INFO L231 Difference]: Finished difference. Result has 513 places, 1652 transitions, 33811 flow [2023-08-24 03:18:10,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=30669, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1032, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=33811, PETRI_PLACES=513, PETRI_TRANSITIONS=1652} [2023-08-24 03:18:10,133 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 483 predicate places. [2023-08-24 03:18:10,133 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1652 transitions, 33811 flow [2023-08-24 03:18:10,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.14285714285714) internal successors, (1458), 14 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:10,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:18:10,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:18:10,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-24 03:18:10,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:10,339 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:18:10,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:18:10,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1910026426, now seen corresponding path program 5 times [2023-08-24 03:18:10,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:18:10,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674562321] [2023-08-24 03:18:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:18:10,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:18:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:10,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:18:10,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674562321] [2023-08-24 03:18:10,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674562321] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:18:10,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985949956] [2023-08-24 03:18:10,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:18:10,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:10,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:18:10,503 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) [2023-08-24 03:18:10,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 03:18:10,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:18:10,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:18:10,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 03:18:10,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:18:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:10,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:18:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:10,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985949956] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:18:10,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:18:10,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 03:18:10,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127949076] [2023-08-24 03:18:10,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:18:10,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 03:18:10,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:18:10,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 03:18:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-08-24 03:18:10,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:18:10,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1652 transitions, 33811 flow. Second operand has 17 states, 17 states have (on average 108.29411764705883) internal successors, (1841), 17 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:10,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:18:10,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:18:10,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:18:15,394 INFO L124 PetriNetUnfolderBase]: 7116/10962 cut-off events. [2023-08-24 03:18:15,395 INFO L125 PetriNetUnfolderBase]: For 311035/311066 co-relation queries the response was YES. [2023-08-24 03:18:15,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114117 conditions, 10962 events. 7116/10962 cut-off events. For 311035/311066 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 69201 event pairs, 1547 based on Foata normal form. 242/11188 useless extension candidates. Maximal degree in co-relation 113932. Up to 6019 conditions per place. [2023-08-24 03:18:15,580 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1467 selfloop transitions, 150 changer transitions 55/1733 dead transitions. [2023-08-24 03:18:15,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1733 transitions, 38329 flow [2023-08-24 03:18:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:18:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:18:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1035 transitions. [2023-08-24 03:18:15,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2023-08-24 03:18:15,582 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1035 transitions. [2023-08-24 03:18:15,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1035 transitions. [2023-08-24 03:18:15,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:18:15,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1035 transitions. [2023-08-24 03:18:15,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:15,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:15,584 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:15,584 INFO L175 Difference]: Start difference. First operand has 513 places, 1652 transitions, 33811 flow. Second operand 9 states and 1035 transitions. [2023-08-24 03:18:15,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1733 transitions, 38329 flow [2023-08-24 03:18:18,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1733 transitions, 37686 flow, removed 229 selfloop flow, removed 6 redundant places. [2023-08-24 03:18:18,847 INFO L231 Difference]: Finished difference. Result has 516 places, 1612 transitions, 32804 flow [2023-08-24 03:18:18,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=32557, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=32804, PETRI_PLACES=516, PETRI_TRANSITIONS=1612} [2023-08-24 03:18:18,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 486 predicate places. [2023-08-24 03:18:18,848 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 1612 transitions, 32804 flow [2023-08-24 03:18:18,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 108.29411764705883) internal successors, (1841), 17 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:18,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:18:18,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:18:18,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-24 03:18:19,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:19,049 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:18:19,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:18:19,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1400152444, now seen corresponding path program 6 times [2023-08-24 03:18:19,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:18:19,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368889813] [2023-08-24 03:18:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:18:19,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:18:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:19,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:18:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368889813] [2023-08-24 03:18:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368889813] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:18:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944870285] [2023-08-24 03:18:19,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:18:19,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:19,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:18:19,129 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) [2023-08-24 03:18:19,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 03:18:19,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 03:18:19,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:18:19,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 03:18:19,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:18:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:19,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:18:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:19,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944870285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:18:19,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:18:19,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 03:18:19,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869169097] [2023-08-24 03:18:19,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:18:19,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 03:18:19,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:18:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 03:18:19,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-24 03:18:19,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:18:19,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1612 transitions, 32804 flow. Second operand has 18 states, 18 states have (on average 108.05555555555556) internal successors, (1945), 18 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:19,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:18:19,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:18:19,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:18:23,988 INFO L124 PetriNetUnfolderBase]: 6735/10342 cut-off events. [2023-08-24 03:18:23,988 INFO L125 PetriNetUnfolderBase]: For 274396/274427 co-relation queries the response was YES. [2023-08-24 03:18:24,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106288 conditions, 10342 events. 6735/10342 cut-off events. For 274396/274427 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 64104 event pairs, 1396 based on Foata normal form. 206/10532 useless extension candidates. Maximal degree in co-relation 106101. Up to 6019 conditions per place. [2023-08-24 03:18:24,165 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1408 selfloop transitions, 145 changer transitions 26/1636 dead transitions. [2023-08-24 03:18:24,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 1636 transitions, 35336 flow [2023-08-24 03:18:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 03:18:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 03:18:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1147 transitions. [2023-08-24 03:18:24,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901360544217687 [2023-08-24 03:18:24,167 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1147 transitions. [2023-08-24 03:18:24,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1147 transitions. [2023-08-24 03:18:24,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:18:24,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1147 transitions. [2023-08-24 03:18:24,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 114.7) internal successors, (1147), 10 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:24,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:24,170 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:24,170 INFO L175 Difference]: Start difference. First operand has 516 places, 1612 transitions, 32804 flow. Second operand 10 states and 1147 transitions. [2023-08-24 03:18:24,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 1636 transitions, 35336 flow [2023-08-24 03:18:26,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1636 transitions, 34829 flow, removed 160 selfloop flow, removed 8 redundant places. [2023-08-24 03:18:26,847 INFO L231 Difference]: Finished difference. Result has 510 places, 1527 transitions, 30635 flow [2023-08-24 03:18:26,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=30175, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=30635, PETRI_PLACES=510, PETRI_TRANSITIONS=1527} [2023-08-24 03:18:26,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 480 predicate places. [2023-08-24 03:18:26,848 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 1527 transitions, 30635 flow [2023-08-24 03:18:26,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.05555555555556) internal successors, (1945), 18 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:26,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:18:26,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:18:26,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-08-24 03:18:27,057 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,SelfDestructingSolverStorable46 [2023-08-24 03:18:27,057 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:18:27,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:18:27,058 INFO L85 PathProgramCache]: Analyzing trace with hash 22070064, now seen corresponding path program 15 times [2023-08-24 03:18:27,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:18:27,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127867336] [2023-08-24 03:18:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:18:27,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:18:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:18:27,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127867336] [2023-08-24 03:18:27,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127867336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:18:27,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617358676] [2023-08-24 03:18:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:18:27,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:27,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:18:27,138 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) [2023-08-24 03:18:27,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-24 03:18:27,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:18:27,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:18:27,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 03:18:27,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:18:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:27,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:18:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:18:27,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617358676] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:18:27,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:18:27,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 03:18:27,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914095927] [2023-08-24 03:18:27,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:18:27,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 03:18:27,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:18:27,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 03:18:27,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-24 03:18:27,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 294 [2023-08-24 03:18:27,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 1527 transitions, 30635 flow. Second operand has 14 states, 14 states have (on average 113.85714285714286) internal successors, (1594), 14 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:27,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:18:27,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 294 [2023-08-24 03:18:27,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:18:30,542 INFO L124 PetriNetUnfolderBase]: 5176/8060 cut-off events. [2023-08-24 03:18:30,542 INFO L125 PetriNetUnfolderBase]: For 210976/211174 co-relation queries the response was YES. [2023-08-24 03:18:30,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83387 conditions, 8060 events. 5176/8060 cut-off events. For 210976/211174 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49758 event pairs, 1236 based on Foata normal form. 495/8495 useless extension candidates. Maximal degree in co-relation 83201. Up to 5816 conditions per place. [2023-08-24 03:18:30,674 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 971 selfloop transitions, 3 changer transitions 375/1413 dead transitions. [2023-08-24 03:18:30,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 1413 transitions, 31094 flow [2023-08-24 03:18:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 03:18:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 03:18:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 836 transitions. [2023-08-24 03:18:30,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4062196307094266 [2023-08-24 03:18:30,675 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 836 transitions. [2023-08-24 03:18:30,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 836 transitions. [2023-08-24 03:18:30,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:18:30,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 836 transitions. [2023-08-24 03:18:30,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:30,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:18:30,678 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 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) [2023-08-24 03:18:30,678 INFO L175 Difference]: Start difference. First operand has 510 places, 1527 transitions, 30635 flow. Second operand 7 states and 836 transitions. [2023-08-24 03:18:30,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 1413 transitions, 31094 flow [2023-08-24 03:18:32,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 1413 transitions, 30155 flow, removed 175 selfloop flow, removed 26 redundant places. [2023-08-24 03:18:32,749 INFO L231 Difference]: Finished difference. Result has 473 places, 1038 transitions, 17468 flow [2023-08-24 03:18:32,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=27399, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17468, PETRI_PLACES=473, PETRI_TRANSITIONS=1038} [2023-08-24 03:18:32,750 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 443 predicate places. [2023-08-24 03:18:32,751 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 1038 transitions, 17468 flow [2023-08-24 03:18:32,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 113.85714285714286) internal successors, (1594), 14 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:32,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:18:32,751 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:18:32,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-24 03:18:32,951 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,SelfDestructingSolverStorable47 [2023-08-24 03:18:32,952 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:18:32,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:18:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash -43062675, now seen corresponding path program 17 times [2023-08-24 03:18:32,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:18:32,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811371440] [2023-08-24 03:18:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:18:32,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:18:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:33,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:18:33,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811371440] [2023-08-24 03:18:33,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811371440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:18:33,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454171410] [2023-08-24 03:18:33,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:18:33,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:33,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:18:33,069 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) [2023-08-24 03:18:33,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-24 03:18:33,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:18:33,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:18:33,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:18:33,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:18:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:33,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:18:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:33,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454171410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:18:33,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:18:33,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2023-08-24 03:18:33,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261813794] [2023-08-24 03:18:33,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:18:33,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 03:18:33,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:18:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 03:18:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-24 03:18:33,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 03:18:33,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 1038 transitions, 17468 flow. Second operand has 16 states, 16 states have (on average 103.6875) internal successors, (1659), 16 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:33,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:18:33,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 03:18:33,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:18:36,065 INFO L124 PetriNetUnfolderBase]: 4593/6722 cut-off events. [2023-08-24 03:18:36,066 INFO L125 PetriNetUnfolderBase]: For 148754/148754 co-relation queries the response was YES. [2023-08-24 03:18:36,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63964 conditions, 6722 events. 4593/6722 cut-off events. For 148754/148754 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 35827 event pairs, 180 based on Foata normal form. 84/6780 useless extension candidates. Maximal degree in co-relation 63795. Up to 1907 conditions per place. [2023-08-24 03:18:36,165 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 839 selfloop transitions, 589 changer transitions 2/1430 dead transitions. [2023-08-24 03:18:36,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 1430 transitions, 26657 flow [2023-08-24 03:18:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 03:18:36,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 03:18:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2174 transitions. [2023-08-24 03:18:36,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697278911564626 [2023-08-24 03:18:36,168 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2174 transitions. [2023-08-24 03:18:36,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2174 transitions. [2023-08-24 03:18:36,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:18:36,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2174 transitions. [2023-08-24 03:18:36,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 108.7) internal successors, (2174), 20 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:36,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:36,174 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:36,175 INFO L175 Difference]: Start difference. First operand has 473 places, 1038 transitions, 17468 flow. Second operand 20 states and 2174 transitions. [2023-08-24 03:18:36,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 1430 transitions, 26657 flow [2023-08-24 03:18:37,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1430 transitions, 24739 flow, removed 684 selfloop flow, removed 43 redundant places. [2023-08-24 03:18:37,046 INFO L231 Difference]: Finished difference. Result has 386 places, 1133 transitions, 19697 flow [2023-08-24 03:18:37,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=16055, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=19697, PETRI_PLACES=386, PETRI_TRANSITIONS=1133} [2023-08-24 03:18:37,048 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2023-08-24 03:18:37,048 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1133 transitions, 19697 flow [2023-08-24 03:18:37,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 103.6875) internal successors, (1659), 16 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:37,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:18:37,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:18:37,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-24 03:18:37,253 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,SelfDestructingSolverStorable48 [2023-08-24 03:18:37,254 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:18:37,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:18:37,254 INFO L85 PathProgramCache]: Analyzing trace with hash -516239637, now seen corresponding path program 18 times [2023-08-24 03:18:37,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:18:37,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107158749] [2023-08-24 03:18:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:18:37,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:18:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:37,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:18:37,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107158749] [2023-08-24 03:18:37,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107158749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:18:37,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906287654] [2023-08-24 03:18:37,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:18:37,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:37,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:18:37,359 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) [2023-08-24 03:18:37,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-24 03:18:37,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:18:37,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:18:37,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 03:18:37,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:18:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:37,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:18:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:37,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906287654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:18:37,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:18:37,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 03:18:37,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301523290] [2023-08-24 03:18:37,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:18:37,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 03:18:37,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:18:37,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 03:18:37,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-24 03:18:37,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:18:37,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1133 transitions, 19697 flow. Second operand has 19 states, 19 states have (on average 108.0) internal successors, (2052), 19 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:37,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:18:37,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:18:37,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:18:40,282 INFO L124 PetriNetUnfolderBase]: 5049/7453 cut-off events. [2023-08-24 03:18:40,283 INFO L125 PetriNetUnfolderBase]: For 161555/161576 co-relation queries the response was YES. [2023-08-24 03:18:40,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71071 conditions, 7453 events. 5049/7453 cut-off events. For 161555/161576 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 40829 event pairs, 545 based on Foata normal form. 137/7541 useless extension candidates. Maximal degree in co-relation 70926. Up to 3663 conditions per place. [2023-08-24 03:18:40,388 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 988 selfloop transitions, 661 changer transitions 0/1693 dead transitions. [2023-08-24 03:18:40,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1693 transitions, 31409 flow [2023-08-24 03:18:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 03:18:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 03:18:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1810 transitions. [2023-08-24 03:18:40,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38477891156462585 [2023-08-24 03:18:40,390 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1810 transitions. [2023-08-24 03:18:40,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1810 transitions. [2023-08-24 03:18:40,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:18:40,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1810 transitions. [2023-08-24 03:18:40,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 113.125) internal successors, (1810), 16 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:40,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 294.0) internal successors, (4998), 17 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:40,395 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 294.0) internal successors, (4998), 17 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:40,395 INFO L175 Difference]: Start difference. First operand has 386 places, 1133 transitions, 19697 flow. Second operand 16 states and 1810 transitions. [2023-08-24 03:18:40,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1693 transitions, 31409 flow [2023-08-24 03:18:41,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1693 transitions, 30426 flow, removed 419 selfloop flow, removed 6 redundant places. [2023-08-24 03:18:41,776 INFO L231 Difference]: Finished difference. Result has 398 places, 1334 transitions, 24162 flow [2023-08-24 03:18:41,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=19073, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24162, PETRI_PLACES=398, PETRI_TRANSITIONS=1334} [2023-08-24 03:18:41,777 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 368 predicate places. [2023-08-24 03:18:41,778 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1334 transitions, 24162 flow [2023-08-24 03:18:41,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 108.0) internal successors, (2052), 19 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:41,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:18:41,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:18:41,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-24 03:18:41,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:41,979 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:18:41,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:18:41,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1861679769, now seen corresponding path program 19 times [2023-08-24 03:18:41,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:18:41,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652462454] [2023-08-24 03:18:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:18:41,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:18:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:42,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:18:42,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652462454] [2023-08-24 03:18:42,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652462454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:18:42,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773991886] [2023-08-24 03:18:42,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:18:42,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:42,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:18:42,082 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) [2023-08-24 03:18:42,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-24 03:18:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:42,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 03:18:42,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:18:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:42,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:18:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:42,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773991886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:18:42,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:18:42,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 03:18:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741510184] [2023-08-24 03:18:42,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:18:42,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 03:18:42,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:18:42,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 03:18:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-08-24 03:18:42,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:18:42,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1334 transitions, 24162 flow. Second operand has 20 states, 20 states have (on average 108.0) internal successors, (2160), 20 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:42,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:18:42,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:18:42,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:18:45,448 INFO L124 PetriNetUnfolderBase]: 5251/7814 cut-off events. [2023-08-24 03:18:45,449 INFO L125 PetriNetUnfolderBase]: For 178864/178895 co-relation queries the response was YES. [2023-08-24 03:18:45,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77602 conditions, 7814 events. 5251/7814 cut-off events. For 178864/178895 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 43731 event pairs, 579 based on Foata normal form. 70/7817 useless extension candidates. Maximal degree in co-relation 77454. Up to 3786 conditions per place. [2023-08-24 03:18:45,561 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1134 selfloop transitions, 623 changer transitions 0/1801 dead transitions. [2023-08-24 03:18:45,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1801 transitions, 35291 flow [2023-08-24 03:18:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 03:18:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 03:18:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2041 transitions. [2023-08-24 03:18:45,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38567649281934996 [2023-08-24 03:18:45,563 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2041 transitions. [2023-08-24 03:18:45,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2041 transitions. [2023-08-24 03:18:45,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:18:45,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2041 transitions. [2023-08-24 03:18:45,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 113.38888888888889) internal successors, (2041), 18 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:45,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:45,567 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:45,567 INFO L175 Difference]: Start difference. First operand has 398 places, 1334 transitions, 24162 flow. Second operand 18 states and 2041 transitions. [2023-08-24 03:18:45,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1801 transitions, 35291 flow [2023-08-24 03:18:47,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1801 transitions, 34188 flow, removed 289 selfloop flow, removed 8 redundant places. [2023-08-24 03:18:47,215 INFO L231 Difference]: Finished difference. Result has 410 places, 1462 transitions, 27038 flow [2023-08-24 03:18:47,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=23174, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=27038, PETRI_PLACES=410, PETRI_TRANSITIONS=1462} [2023-08-24 03:18:47,216 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2023-08-24 03:18:47,216 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 1462 transitions, 27038 flow [2023-08-24 03:18:47,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.0) internal successors, (2160), 20 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:47,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:18:47,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:18:47,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-24 03:18:47,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:47,417 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:18:47,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:18:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash -116171827, now seen corresponding path program 20 times [2023-08-24 03:18:47,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:18:47,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074710544] [2023-08-24 03:18:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:18:47,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:18:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:47,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:18:47,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074710544] [2023-08-24 03:18:47,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074710544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:18:47,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350286636] [2023-08-24 03:18:47,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:18:47,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:47,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:18:47,517 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) [2023-08-24 03:18:47,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-24 03:18:47,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:18:47,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:18:47,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 03:18:47,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:18:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:47,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:18:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:47,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350286636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:18:47,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:18:47,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 03:18:47,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858312424] [2023-08-24 03:18:47,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:18:47,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 03:18:47,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:18:47,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 03:18:47,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-24 03:18:47,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:18:47,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1462 transitions, 27038 flow. Second operand has 19 states, 19 states have (on average 108.36842105263158) internal successors, (2059), 19 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:47,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:18:47,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:18:47,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:18:50,657 INFO L124 PetriNetUnfolderBase]: 5077/7518 cut-off events. [2023-08-24 03:18:50,657 INFO L125 PetriNetUnfolderBase]: For 171149/171172 co-relation queries the response was YES. [2023-08-24 03:18:50,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74831 conditions, 7518 events. 5077/7518 cut-off events. For 171149/171172 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 41443 event pairs, 604 based on Foata normal form. 171/7651 useless extension candidates. Maximal degree in co-relation 74681. Up to 3914 conditions per place. [2023-08-24 03:18:50,758 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 947 selfloop transitions, 736 changer transitions 0/1725 dead transitions. [2023-08-24 03:18:50,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1725 transitions, 34022 flow [2023-08-24 03:18:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 03:18:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 03:18:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1696 transitions. [2023-08-24 03:18:50,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38458049886621315 [2023-08-24 03:18:50,760 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1696 transitions. [2023-08-24 03:18:50,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1696 transitions. [2023-08-24 03:18:50,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:18:50,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1696 transitions. [2023-08-24 03:18:50,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 113.06666666666666) internal successors, (1696), 15 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:50,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:50,764 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:50,764 INFO L175 Difference]: Start difference. First operand has 410 places, 1462 transitions, 27038 flow. Second operand 15 states and 1696 transitions. [2023-08-24 03:18:50,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1725 transitions, 34022 flow [2023-08-24 03:18:52,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1725 transitions, 33240 flow, removed 330 selfloop flow, removed 6 redundant places. [2023-08-24 03:18:52,163 INFO L231 Difference]: Finished difference. Result has 415 places, 1450 transitions, 27594 flow [2023-08-24 03:18:52,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=25839, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=717, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=27594, PETRI_PLACES=415, PETRI_TRANSITIONS=1450} [2023-08-24 03:18:52,164 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 385 predicate places. [2023-08-24 03:18:52,164 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 1450 transitions, 27594 flow [2023-08-24 03:18:52,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 108.36842105263158) internal successors, (2059), 19 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:52,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:18:52,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:18:52,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-24 03:18:52,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:52,373 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:18:52,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:18:52,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1215577777, now seen corresponding path program 16 times [2023-08-24 03:18:52,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:18:52,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966809086] [2023-08-24 03:18:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:18:52,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:18:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:52,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:18:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966809086] [2023-08-24 03:18:52,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966809086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:18:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324639955] [2023-08-24 03:18:52,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:18:52,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:52,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:18:52,487 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) [2023-08-24 03:18:52,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-24 03:18:52,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:18:52,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:18:52,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:18:52,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:18:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:52,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:18:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:52,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324639955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:18:52,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:18:52,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2023-08-24 03:18:52,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580888160] [2023-08-24 03:18:52,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:18:52,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 03:18:52,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:18:52,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 03:18:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-24 03:18:52,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 03:18:52,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 1450 transitions, 27594 flow. Second operand has 16 states, 16 states have (on average 103.6875) internal successors, (1659), 16 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:52,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:18:52,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 03:18:52,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:18:55,721 INFO L124 PetriNetUnfolderBase]: 5112/7557 cut-off events. [2023-08-24 03:18:55,721 INFO L125 PetriNetUnfolderBase]: For 164861/164861 co-relation queries the response was YES. [2023-08-24 03:18:55,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76297 conditions, 7557 events. 5112/7557 cut-off events. For 164861/164861 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 41437 event pairs, 441 based on Foata normal form. 32/7561 useless extension candidates. Maximal degree in co-relation 76147. Up to 2697 conditions per place. [2023-08-24 03:18:55,822 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 1090 selfloop transitions, 528 changer transitions 2/1620 dead transitions. [2023-08-24 03:18:55,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1620 transitions, 33474 flow [2023-08-24 03:18:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 03:18:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 03:18:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2158 transitions. [2023-08-24 03:18:55,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36700680272108843 [2023-08-24 03:18:55,825 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2158 transitions. [2023-08-24 03:18:55,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2158 transitions. [2023-08-24 03:18:55,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:18:55,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2158 transitions. [2023-08-24 03:18:55,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 107.9) internal successors, (2158), 20 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:55,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:55,829 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:55,829 INFO L175 Difference]: Start difference. First operand has 415 places, 1450 transitions, 27594 flow. Second operand 20 states and 2158 transitions. [2023-08-24 03:18:55,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1620 transitions, 33474 flow [2023-08-24 03:18:57,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1620 transitions, 32129 flow, removed 122 selfloop flow, removed 11 redundant places. [2023-08-24 03:18:57,335 INFO L231 Difference]: Finished difference. Result has 426 places, 1450 transitions, 27494 flow [2023-08-24 03:18:57,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=26153, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=919, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27494, PETRI_PLACES=426, PETRI_TRANSITIONS=1450} [2023-08-24 03:18:57,336 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 396 predicate places. [2023-08-24 03:18:57,336 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1450 transitions, 27494 flow [2023-08-24 03:18:57,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 103.6875) internal successors, (1659), 16 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:57,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:18:57,337 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:18:57,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-08-24 03:18:57,537 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,SelfDestructingSolverStorable52 [2023-08-24 03:18:57,537 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:18:57,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:18:57,538 INFO L85 PathProgramCache]: Analyzing trace with hash 934831863, now seen corresponding path program 17 times [2023-08-24 03:18:57,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:18:57,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202493948] [2023-08-24 03:18:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:18:57,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:18:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:18:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:57,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:18:57,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202493948] [2023-08-24 03:18:57,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202493948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:18:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183675649] [2023-08-24 03:18:57,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:18:57,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:18:57,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:18:57,653 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) [2023-08-24 03:18:57,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-24 03:18:57,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:18:57,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:18:57,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:18:57,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:18:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:57,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:18:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:18:58,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183675649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:18:58,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:18:58,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-24 03:18:58,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933257565] [2023-08-24 03:18:58,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:18:58,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 03:18:58,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:18:58,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 03:18:58,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-08-24 03:18:58,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 03:18:58,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1450 transitions, 27494 flow. Second operand has 18 states, 18 states have (on average 103.33333333333333) internal successors, (1860), 18 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:18:58,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:18:58,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 03:18:58,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:01,252 INFO L124 PetriNetUnfolderBase]: 5120/7569 cut-off events. [2023-08-24 03:19:01,252 INFO L125 PetriNetUnfolderBase]: For 174349/174349 co-relation queries the response was YES. [2023-08-24 03:19:01,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76624 conditions, 7569 events. 5120/7569 cut-off events. For 174349/174349 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 41572 event pairs, 541 based on Foata normal form. 32/7573 useless extension candidates. Maximal degree in co-relation 76471. Up to 3333 conditions per place. [2023-08-24 03:19:01,364 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 1006 selfloop transitions, 578 changer transitions 2/1586 dead transitions. [2023-08-24 03:19:01,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1586 transitions, 32655 flow [2023-08-24 03:19:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 03:19:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 03:19:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2466 transitions. [2023-08-24 03:19:01,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3646850044365572 [2023-08-24 03:19:01,367 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2466 transitions. [2023-08-24 03:19:01,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2466 transitions. [2023-08-24 03:19:01,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:01,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2466 transitions. [2023-08-24 03:19:01,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.21739130434783) internal successors, (2466), 23 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:01,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 294.0) internal successors, (7056), 24 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:01,371 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 294.0) internal successors, (7056), 24 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:01,371 INFO L175 Difference]: Start difference. First operand has 426 places, 1450 transitions, 27494 flow. Second operand 23 states and 2466 transitions. [2023-08-24 03:19:01,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 1586 transitions, 32655 flow [2023-08-24 03:19:02,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1586 transitions, 31833 flow, removed 96 selfloop flow, removed 15 redundant places. [2023-08-24 03:19:02,939 INFO L231 Difference]: Finished difference. Result has 433 places, 1444 transitions, 27887 flow [2023-08-24 03:19:02,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=26471, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=27887, PETRI_PLACES=433, PETRI_TRANSITIONS=1444} [2023-08-24 03:19:02,941 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 403 predicate places. [2023-08-24 03:19:02,941 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1444 transitions, 27887 flow [2023-08-24 03:19:02,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.33333333333333) internal successors, (1860), 18 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:02,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:02,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:02,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:03,147 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,SelfDestructingSolverStorable53 [2023-08-24 03:19:03,148 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:19:03,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash -911170381, now seen corresponding path program 21 times [2023-08-24 03:19:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:03,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832844363] [2023-08-24 03:19:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:03,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:03,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:03,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832844363] [2023-08-24 03:19:03,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832844363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:03,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001256730] [2023-08-24 03:19:03,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:19:03,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:03,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:03,242 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) [2023-08-24 03:19:03,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-24 03:19:03,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:19:03,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:03,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 03:19:03,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:03,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:03,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001256730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:03,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:03,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 03:19:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306943822] [2023-08-24 03:19:03,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:03,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 03:19:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:03,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 03:19:03,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-08-24 03:19:03,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:19:03,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1444 transitions, 27887 flow. Second operand has 20 states, 20 states have (on average 108.0) internal successors, (2160), 20 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:03,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:03,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:19:03,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:06,408 INFO L124 PetriNetUnfolderBase]: 4977/7329 cut-off events. [2023-08-24 03:19:06,408 INFO L125 PetriNetUnfolderBase]: For 181071/181100 co-relation queries the response was YES. [2023-08-24 03:19:06,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75805 conditions, 7329 events. 4977/7329 cut-off events. For 181071/181100 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 39868 event pairs, 551 based on Foata normal form. 67/7363 useless extension candidates. Maximal degree in co-relation 75655. Up to 3660 conditions per place. [2023-08-24 03:19:06,509 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1052 selfloop transitions, 606 changer transitions 0/1699 dead transitions. [2023-08-24 03:19:06,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1699 transitions, 35138 flow [2023-08-24 03:19:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 03:19:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 03:19:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1811 transitions. [2023-08-24 03:19:06,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38499149659863946 [2023-08-24 03:19:06,511 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1811 transitions. [2023-08-24 03:19:06,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1811 transitions. [2023-08-24 03:19:06,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:06,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1811 transitions. [2023-08-24 03:19:06,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 113.1875) internal successors, (1811), 16 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:06,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 294.0) internal successors, (4998), 17 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:06,515 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 294.0) internal successors, (4998), 17 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:06,515 INFO L175 Difference]: Start difference. First operand has 433 places, 1444 transitions, 27887 flow. Second operand 16 states and 1811 transitions. [2023-08-24 03:19:06,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1699 transitions, 35138 flow [2023-08-24 03:19:07,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1699 transitions, 33715 flow, removed 54 selfloop flow, removed 19 redundant places. [2023-08-24 03:19:07,870 INFO L231 Difference]: Finished difference. Result has 428 places, 1433 transitions, 27571 flow [2023-08-24 03:19:07,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=26359, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=606, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=27571, PETRI_PLACES=428, PETRI_TRANSITIONS=1433} [2023-08-24 03:19:07,872 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 398 predicate places. [2023-08-24 03:19:07,872 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 1433 transitions, 27571 flow [2023-08-24 03:19:07,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.0) internal successors, (2160), 20 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:07,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:07,873 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:07,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:08,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:08,079 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:19:08,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1786334059, now seen corresponding path program 22 times [2023-08-24 03:19:08,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:08,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437598396] [2023-08-24 03:19:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:08,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:08,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:08,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437598396] [2023-08-24 03:19:08,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437598396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:08,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722895045] [2023-08-24 03:19:08,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:19:08,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:08,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:08,208 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) [2023-08-24 03:19:08,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-24 03:19:08,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:19:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:08,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:19:08,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:08,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722895045] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:08,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:08,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2023-08-24 03:19:08,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448594851] [2023-08-24 03:19:08,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:08,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 03:19:08,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:08,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 03:19:08,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-24 03:19:08,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 03:19:08,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1433 transitions, 27571 flow. Second operand has 16 states, 16 states have (on average 103.6875) internal successors, (1659), 16 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:08,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:08,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 03:19:08,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:11,676 INFO L124 PetriNetUnfolderBase]: 5074/7478 cut-off events. [2023-08-24 03:19:11,676 INFO L125 PetriNetUnfolderBase]: For 176345/176345 co-relation queries the response was YES. [2023-08-24 03:19:11,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77215 conditions, 7478 events. 5074/7478 cut-off events. For 176345/176345 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 40678 event pairs, 330 based on Foata normal form. 38/7496 useless extension candidates. Maximal degree in co-relation 77066. Up to 2091 conditions per place. [2023-08-24 03:19:11,783 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 980 selfloop transitions, 701 changer transitions 2/1683 dead transitions. [2023-08-24 03:19:11,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1683 transitions, 35077 flow [2023-08-24 03:19:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 03:19:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 03:19:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2144 transitions. [2023-08-24 03:19:11,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36462585034013606 [2023-08-24 03:19:11,786 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2144 transitions. [2023-08-24 03:19:11,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2144 transitions. [2023-08-24 03:19:11,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:11,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2144 transitions. [2023-08-24 03:19:11,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 107.2) internal successors, (2144), 20 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:11,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:11,792 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 294.0) internal successors, (6174), 21 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:11,792 INFO L175 Difference]: Start difference. First operand has 428 places, 1433 transitions, 27571 flow. Second operand 20 states and 2144 transitions. [2023-08-24 03:19:11,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1683 transitions, 35077 flow [2023-08-24 03:19:13,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1683 transitions, 33844 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-08-24 03:19:13,419 INFO L231 Difference]: Finished difference. Result has 436 places, 1495 transitions, 29392 flow [2023-08-24 03:19:13,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=26401, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=639, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=29392, PETRI_PLACES=436, PETRI_TRANSITIONS=1495} [2023-08-24 03:19:13,421 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 406 predicate places. [2023-08-24 03:19:13,421 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1495 transitions, 29392 flow [2023-08-24 03:19:13,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 103.6875) internal successors, (1659), 16 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:13,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:13,422 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:13,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:13,627 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,SelfDestructingSolverStorable55 [2023-08-24 03:19:13,628 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:19:13,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1082191283, now seen corresponding path program 23 times [2023-08-24 03:19:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:13,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538749727] [2023-08-24 03:19:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:13,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:13,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:13,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538749727] [2023-08-24 03:19:13,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538749727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:13,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946577377] [2023-08-24 03:19:13,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:19:13,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:13,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:13,720 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) [2023-08-24 03:19:13,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-24 03:19:13,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:19:13,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:13,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:19:13,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:13,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:14,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946577377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:14,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:14,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-08-24 03:19:14,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543751149] [2023-08-24 03:19:14,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:14,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 03:19:14,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:14,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 03:19:14,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-08-24 03:19:14,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 294 [2023-08-24 03:19:14,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1495 transitions, 29392 flow. Second operand has 18 states, 18 states have (on average 103.38888888888889) internal successors, (1861), 18 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:14,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:14,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 294 [2023-08-24 03:19:14,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:17,277 INFO L124 PetriNetUnfolderBase]: 5019/7376 cut-off events. [2023-08-24 03:19:17,278 INFO L125 PetriNetUnfolderBase]: For 177731/177731 co-relation queries the response was YES. [2023-08-24 03:19:17,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76754 conditions, 7376 events. 5019/7376 cut-off events. For 177731/177731 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 39874 event pairs, 325 based on Foata normal form. 38/7394 useless extension candidates. Maximal degree in co-relation 76602. Up to 2091 conditions per place. [2023-08-24 03:19:17,390 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 942 selfloop transitions, 765 changer transitions 2/1709 dead transitions. [2023-08-24 03:19:17,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1709 transitions, 35561 flow [2023-08-24 03:19:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 03:19:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 03:19:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3100 transitions. [2023-08-24 03:19:17,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3635937133474079 [2023-08-24 03:19:17,392 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3100 transitions. [2023-08-24 03:19:17,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3100 transitions. [2023-08-24 03:19:17,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:17,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3100 transitions. [2023-08-24 03:19:17,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 106.89655172413794) internal successors, (3100), 29 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:17,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 294.0) internal successors, (8820), 30 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:17,400 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 294.0) internal successors, (8820), 30 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:17,400 INFO L175 Difference]: Start difference. First operand has 436 places, 1495 transitions, 29392 flow. Second operand 29 states and 3100 transitions. [2023-08-24 03:19:17,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1709 transitions, 35561 flow [2023-08-24 03:19:18,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1709 transitions, 35304 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-08-24 03:19:19,023 INFO L231 Difference]: Finished difference. Result has 458 places, 1490 transitions, 30585 flow [2023-08-24 03:19:19,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=28913, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=760, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=30585, PETRI_PLACES=458, PETRI_TRANSITIONS=1490} [2023-08-24 03:19:19,025 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 428 predicate places. [2023-08-24 03:19:19,025 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1490 transitions, 30585 flow [2023-08-24 03:19:19,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.38888888888889) internal successors, (1861), 18 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:19,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:19,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:19,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:19,231 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,SelfDestructingSolverStorable56 [2023-08-24 03:19:19,231 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:19:19,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2120840527, now seen corresponding path program 18 times [2023-08-24 03:19:19,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:19,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739516058] [2023-08-24 03:19:19,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:19,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:19,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:19,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739516058] [2023-08-24 03:19:19,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739516058] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:19,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000739646] [2023-08-24 03:19:19,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:19:19,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:19,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:19,328 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) [2023-08-24 03:19:19,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-24 03:19:19,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:19:19,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:19,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 03:19:19,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:19,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:19,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000739646] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:19,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:19,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 03:19:19,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970283770] [2023-08-24 03:19:19,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:19,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 03:19:19,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 03:19:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-24 03:19:19,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:19:19,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1490 transitions, 30585 flow. Second operand has 19 states, 19 states have (on average 108.26315789473684) internal successors, (2057), 19 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:19,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:19,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:19:19,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:22,483 INFO L124 PetriNetUnfolderBase]: 5400/7943 cut-off events. [2023-08-24 03:19:22,483 INFO L125 PetriNetUnfolderBase]: For 220956/220975 co-relation queries the response was YES. [2023-08-24 03:19:22,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86819 conditions, 7943 events. 5400/7943 cut-off events. For 220956/220975 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 43457 event pairs, 412 based on Foata normal form. 27/7942 useless extension candidates. Maximal degree in co-relation 86667. Up to 2275 conditions per place. [2023-08-24 03:19:22,596 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1095 selfloop transitions, 565 changer transitions 0/1703 dead transitions. [2023-08-24 03:19:22,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1703 transitions, 37581 flow [2023-08-24 03:19:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 03:19:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 03:19:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1128 transitions. [2023-08-24 03:19:22,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3836734693877551 [2023-08-24 03:19:22,598 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1128 transitions. [2023-08-24 03:19:22,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1128 transitions. [2023-08-24 03:19:22,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:22,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1128 transitions. [2023-08-24 03:19:22,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 112.8) internal successors, (1128), 10 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:22,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:22,600 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:22,600 INFO L175 Difference]: Start difference. First operand has 458 places, 1490 transitions, 30585 flow. Second operand 10 states and 1128 transitions. [2023-08-24 03:19:22,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1703 transitions, 37581 flow [2023-08-24 03:19:24,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1703 transitions, 35748 flow, removed 34 selfloop flow, removed 28 redundant places. [2023-08-24 03:19:24,325 INFO L231 Difference]: Finished difference. Result has 442 places, 1508 transitions, 30960 flow [2023-08-24 03:19:24,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=28779, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=30960, PETRI_PLACES=442, PETRI_TRANSITIONS=1508} [2023-08-24 03:19:24,326 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 412 predicate places. [2023-08-24 03:19:24,326 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1508 transitions, 30960 flow [2023-08-24 03:19:24,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 108.26315789473684) internal successors, (2057), 19 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:24,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:24,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:24,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:24,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:24,533 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:19:24,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:24,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1762338353, now seen corresponding path program 19 times [2023-08-24 03:19:24,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:24,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644286190] [2023-08-24 03:19:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:24,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:24,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:24,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644286190] [2023-08-24 03:19:24,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644286190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:24,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169465772] [2023-08-24 03:19:24,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:19:24,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:24,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:24,639 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) [2023-08-24 03:19:24,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-24 03:19:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:24,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 03:19:24,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:24,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:25,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169465772] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:25,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:25,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 03:19:25,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657308171] [2023-08-24 03:19:25,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:25,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 03:19:25,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 03:19:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-08-24 03:19:25,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:19:25,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1508 transitions, 30960 flow. Second operand has 20 states, 20 states have (on average 108.0) internal successors, (2160), 20 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:25,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:25,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:19:25,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:28,122 INFO L124 PetriNetUnfolderBase]: 5405/7950 cut-off events. [2023-08-24 03:19:28,122 INFO L125 PetriNetUnfolderBase]: For 236555/236584 co-relation queries the response was YES. [2023-08-24 03:19:28,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87801 conditions, 7950 events. 5405/7950 cut-off events. For 236555/236584 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 43441 event pairs, 761 based on Foata normal form. 30/7967 useless extension candidates. Maximal degree in co-relation 87649. Up to 4367 conditions per place. [2023-08-24 03:19:28,232 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1096 selfloop transitions, 513 changer transitions 0/1652 dead transitions. [2023-08-24 03:19:28,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1652 transitions, 36075 flow [2023-08-24 03:19:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 03:19:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 03:19:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1353 transitions. [2023-08-24 03:19:28,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835034013605442 [2023-08-24 03:19:28,233 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1353 transitions. [2023-08-24 03:19:28,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1353 transitions. [2023-08-24 03:19:28,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:28,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1353 transitions. [2023-08-24 03:19:28,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 112.75) internal successors, (1353), 12 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:28,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 294.0) internal successors, (3822), 13 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:28,236 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 294.0) internal successors, (3822), 13 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:28,236 INFO L175 Difference]: Start difference. First operand has 442 places, 1508 transitions, 30960 flow. Second operand 12 states and 1353 transitions. [2023-08-24 03:19:28,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1652 transitions, 36075 flow [2023-08-24 03:19:30,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1652 transitions, 35470 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-08-24 03:19:30,154 INFO L231 Difference]: Finished difference. Result has 448 places, 1513 transitions, 31550 flow [2023-08-24 03:19:30,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=30368, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=995, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=31550, PETRI_PLACES=448, PETRI_TRANSITIONS=1513} [2023-08-24 03:19:30,155 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 418 predicate places. [2023-08-24 03:19:30,155 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 1513 transitions, 31550 flow [2023-08-24 03:19:30,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.0) internal successors, (2160), 20 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:30,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:30,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:30,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:30,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:30,357 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:19:30,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash 212563825, now seen corresponding path program 20 times [2023-08-24 03:19:30,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:30,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991893827] [2023-08-24 03:19:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:30,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:30,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:30,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991893827] [2023-08-24 03:19:30,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991893827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:30,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924413698] [2023-08-24 03:19:30,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:19:30,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:30,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:30,451 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) [2023-08-24 03:19:30,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-24 03:19:30,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:19:30,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:30,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 03:19:30,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:30,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:19:30,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924413698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:30,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:30,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 03:19:30,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502643963] [2023-08-24 03:19:30,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:30,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 03:19:30,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:30,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 03:19:30,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-24 03:19:30,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:19:30,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1513 transitions, 31550 flow. Second operand has 21 states, 21 states have (on average 108.04761904761905) internal successors, (2269), 21 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:30,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:30,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:19:30,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:34,210 INFO L124 PetriNetUnfolderBase]: 5788/8481 cut-off events. [2023-08-24 03:19:34,210 INFO L125 PetriNetUnfolderBase]: For 260620/260649 co-relation queries the response was YES. [2023-08-24 03:19:34,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95769 conditions, 8481 events. 5788/8481 cut-off events. For 260620/260649 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 46469 event pairs, 396 based on Foata normal form. 28/8496 useless extension candidates. Maximal degree in co-relation 95616. Up to 2467 conditions per place. [2023-08-24 03:19:34,344 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1080 selfloop transitions, 746 changer transitions 0/1869 dead transitions. [2023-08-24 03:19:34,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1869 transitions, 41570 flow [2023-08-24 03:19:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 03:19:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 03:19:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2052 transitions. [2023-08-24 03:19:34,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2023-08-24 03:19:34,347 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2052 transitions. [2023-08-24 03:19:34,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2052 transitions. [2023-08-24 03:19:34,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:34,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2052 transitions. [2023-08-24 03:19:34,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 114.0) internal successors, (2052), 18 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:34,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:34,353 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:34,353 INFO L175 Difference]: Start difference. First operand has 448 places, 1513 transitions, 31550 flow. Second operand 18 states and 2052 transitions. [2023-08-24 03:19:34,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1869 transitions, 41570 flow [2023-08-24 03:19:36,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 1869 transitions, 40503 flow, removed 33 selfloop flow, removed 10 redundant places. [2023-08-24 03:19:36,834 INFO L231 Difference]: Finished difference. Result has 458 places, 1549 transitions, 33536 flow [2023-08-24 03:19:36,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=30462, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=33536, PETRI_PLACES=458, PETRI_TRANSITIONS=1549} [2023-08-24 03:19:36,836 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 428 predicate places. [2023-08-24 03:19:36,836 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1549 transitions, 33536 flow [2023-08-24 03:19:36,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 108.04761904761905) internal successors, (2269), 21 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:36,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:36,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:36,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:37,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-24 03:19:37,043 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:19:37,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:37,043 INFO L85 PathProgramCache]: Analyzing trace with hash -634056799, now seen corresponding path program 21 times [2023-08-24 03:19:37,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:37,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714604166] [2023-08-24 03:19:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:37,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:19:37,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:37,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714604166] [2023-08-24 03:19:37,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714604166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:37,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767563350] [2023-08-24 03:19:37,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:19:37,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:37,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:37,136 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) [2023-08-24 03:19:37,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-24 03:19:37,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:19:37,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:37,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 03:19:37,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:19:37,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:19:37,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767563350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:37,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:37,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 03:19:37,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760702559] [2023-08-24 03:19:37,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:37,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 03:19:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 03:19:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-24 03:19:37,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2023-08-24 03:19:37,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1549 transitions, 33536 flow. Second operand has 20 states, 20 states have (on average 108.45) internal successors, (2169), 20 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:37,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:37,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2023-08-24 03:19:37,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:40,786 INFO L124 PetriNetUnfolderBase]: 5752/8414 cut-off events. [2023-08-24 03:19:40,786 INFO L125 PetriNetUnfolderBase]: For 269515/269544 co-relation queries the response was YES. [2023-08-24 03:19:40,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97106 conditions, 8414 events. 5752/8414 cut-off events. For 269515/269544 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 45885 event pairs, 392 based on Foata normal form. 30/8431 useless extension candidates. Maximal degree in co-relation 96949. Up to 2429 conditions per place. [2023-08-24 03:19:41,118 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 1060 selfloop transitions, 744 changer transitions 0/1846 dead transitions. [2023-08-24 03:19:41,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 1846 transitions, 42010 flow [2023-08-24 03:19:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 03:19:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 03:19:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2049 transitions. [2023-08-24 03:19:41,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38718820861678005 [2023-08-24 03:19:41,120 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2049 transitions. [2023-08-24 03:19:41,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2049 transitions. [2023-08-24 03:19:41,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:41,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2049 transitions. [2023-08-24 03:19:41,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 113.83333333333333) internal successors, (2049), 18 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:41,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:41,124 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:41,124 INFO L175 Difference]: Start difference. First operand has 458 places, 1549 transitions, 33536 flow. Second operand 18 states and 2049 transitions. [2023-08-24 03:19:41,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 1846 transitions, 42010 flow [2023-08-24 03:19:43,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1846 transitions, 40666 flow, removed 148 selfloop flow, removed 11 redundant places. [2023-08-24 03:19:43,601 INFO L231 Difference]: Finished difference. Result has 462 places, 1538 transitions, 33462 flow [2023-08-24 03:19:43,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=31974, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=744, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=33462, PETRI_PLACES=462, PETRI_TRANSITIONS=1538} [2023-08-24 03:19:43,602 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 432 predicate places. [2023-08-24 03:19:43,602 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1538 transitions, 33462 flow [2023-08-24 03:19:43,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.45) internal successors, (2169), 20 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:43,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:43,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:43,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-08-24 03:19:43,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:43,803 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:19:43,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:43,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1550715807, now seen corresponding path program 7 times [2023-08-24 03:19:43,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:43,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003274097] [2023-08-24 03:19:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:43,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:44,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:44,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003274097] [2023-08-24 03:19:44,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003274097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:44,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425300337] [2023-08-24 03:19:44,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:19:44,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:44,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:44,746 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) [2023-08-24 03:19:44,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-24 03:19:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:45,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 03:19:45,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:45,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:19:45,466 INFO L351 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 25 [2023-08-24 03:19:45,700 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:19:45,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:19:45,704 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:19:45,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 15 [2023-08-24 03:19:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:19:45,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:46,030 WARN L839 $PredicateComparison]: unable to prove that (forall ((~M~0 Int)) (or (<= ~M~0 c_thread2Thread1of1ForFork1_~i~1) (forall ((v_ArrVal_2756 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread2Thread1of1ForFork1_~i~1 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2756) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))) 4294967296) (mod c_~sum1~0 4294967296))) (< (+ c_thread2Thread1of1ForFork1_~i~1 1) ~M~0))) is different from false [2023-08-24 03:19:46,298 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:19:46,299 INFO L351 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 94 treesize of output 80 [2023-08-24 03:19:46,305 INFO L351 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 18 [2023-08-24 03:19:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-24 03:19:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425300337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:47,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:47,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 37 [2023-08-24 03:19:47,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646980453] [2023-08-24 03:19:47,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:47,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 03:19:47,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:47,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 03:19:47,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1233, Unknown=15, NotChecked=72, Total=1482 [2023-08-24 03:19:47,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 294 [2023-08-24 03:19:47,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1538 transitions, 33462 flow. Second operand has 39 states, 39 states have (on average 80.97435897435898) internal successors, (3158), 39 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:47,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:47,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 294 [2023-08-24 03:19:47,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:52,312 INFO L124 PetriNetUnfolderBase]: 7112/10416 cut-off events. [2023-08-24 03:19:52,312 INFO L125 PetriNetUnfolderBase]: For 308359/308359 co-relation queries the response was YES. [2023-08-24 03:19:52,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117070 conditions, 10416 events. 7112/10416 cut-off events. For 308359/308359 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 58505 event pairs, 733 based on Foata normal form. 1/10417 useless extension candidates. Maximal degree in co-relation 116914. Up to 8512 conditions per place. [2023-08-24 03:19:52,464 INFO L140 encePairwiseOnDemand]: 282/294 looper letters, 1544 selfloop transitions, 464 changer transitions 1/2009 dead transitions. [2023-08-24 03:19:52,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 2009 transitions, 46815 flow [2023-08-24 03:19:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 03:19:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 03:19:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1249 transitions. [2023-08-24 03:19:52,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3034499514091351 [2023-08-24 03:19:52,465 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1249 transitions. [2023-08-24 03:19:52,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1249 transitions. [2023-08-24 03:19:52,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:52,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1249 transitions. [2023-08-24 03:19:52,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.21428571428571) internal successors, (1249), 14 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:52,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 294.0) internal successors, (4410), 15 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:52,468 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 294.0) internal successors, (4410), 15 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:52,468 INFO L175 Difference]: Start difference. First operand has 462 places, 1538 transitions, 33462 flow. Second operand 14 states and 1249 transitions. [2023-08-24 03:19:52,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 2009 transitions, 46815 flow [2023-08-24 03:19:55,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 2009 transitions, 45271 flow, removed 5 selfloop flow, removed 16 redundant places. [2023-08-24 03:19:55,632 INFO L231 Difference]: Finished difference. Result has 464 places, 1788 transitions, 39424 flow [2023-08-24 03:19:55,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=32313, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=39424, PETRI_PLACES=464, PETRI_TRANSITIONS=1788} [2023-08-24 03:19:55,633 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 434 predicate places. [2023-08-24 03:19:55,633 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 1788 transitions, 39424 flow [2023-08-24 03:19:55,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 80.97435897435898) internal successors, (3158), 39 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:55,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:55,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:55,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:55,833 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,SelfDestructingSolverStorable61 [2023-08-24 03:19:55,834 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:19:55,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:55,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1215257821, now seen corresponding path program 8 times [2023-08-24 03:19:55,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:55,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119605055] [2023-08-24 03:19:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:55,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:56,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:56,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119605055] [2023-08-24 03:19:56,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119605055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:56,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096420332] [2023-08-24 03:19:56,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:19:56,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:56,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:56,628 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) [2023-08-24 03:19:56,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-24 03:19:57,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:19:57,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:57,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:19:57,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:57,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:19:57,491 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:19:57,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2023-08-24 03:19:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:19:57,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:58,030 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:19:58,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 51 [2023-08-24 03:20:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:20:13,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096420332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:13,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:13,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 30 [2023-08-24 03:20:13,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92360437] [2023-08-24 03:20:13,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:13,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 03:20:13,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:13,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 03:20:13,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=859, Unknown=2, NotChecked=0, Total=992 [2023-08-24 03:20:13,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 03:20:13,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 1788 transitions, 39424 flow. Second operand has 32 states, 32 states have (on average 84.40625) internal successors, (2701), 32 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:13,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:13,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 03:20:13,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:21,283 INFO L124 PetriNetUnfolderBase]: 9450/13849 cut-off events. [2023-08-24 03:20:21,283 INFO L125 PetriNetUnfolderBase]: For 441821/441821 co-relation queries the response was YES. [2023-08-24 03:20:21,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162605 conditions, 13849 events. 9450/13849 cut-off events. For 441821/441821 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 81238 event pairs, 1007 based on Foata normal form. 2/13851 useless extension candidates. Maximal degree in co-relation 162444. Up to 11009 conditions per place. [2023-08-24 03:20:21,504 INFO L140 encePairwiseOnDemand]: 280/294 looper letters, 1997 selfloop transitions, 786 changer transitions 2/2785 dead transitions. [2023-08-24 03:20:21,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 2785 transitions, 68616 flow [2023-08-24 03:20:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 03:20:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 03:20:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2764 transitions. [2023-08-24 03:20:21,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3133786848072562 [2023-08-24 03:20:21,507 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2764 transitions. [2023-08-24 03:20:21,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2764 transitions. [2023-08-24 03:20:21,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:21,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2764 transitions. [2023-08-24 03:20:21,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 92.13333333333334) internal successors, (2764), 30 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:21,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 294.0) internal successors, (9114), 31 states have internal predecessors, (9114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:21,513 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 294.0) internal successors, (9114), 31 states have internal predecessors, (9114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:21,513 INFO L175 Difference]: Start difference. First operand has 464 places, 1788 transitions, 39424 flow. Second operand 30 states and 2764 transitions. [2023-08-24 03:20:21,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 2785 transitions, 68616 flow [2023-08-24 03:20:28,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 2785 transitions, 64669 flow, removed 1745 selfloop flow, removed 5 redundant places. [2023-08-24 03:20:28,485 INFO L231 Difference]: Finished difference. Result has 496 places, 2367 transitions, 54253 flow [2023-08-24 03:20:28,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=38052, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=54253, PETRI_PLACES=496, PETRI_TRANSITIONS=2367} [2023-08-24 03:20:28,486 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 466 predicate places. [2023-08-24 03:20:28,486 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 2367 transitions, 54253 flow [2023-08-24 03:20:28,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 84.40625) internal successors, (2701), 32 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:28,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:28,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:28,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:28,689 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,SelfDestructingSolverStorable62 [2023-08-24 03:20:28,689 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:20:28,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:28,689 INFO L85 PathProgramCache]: Analyzing trace with hash -160284943, now seen corresponding path program 9 times [2023-08-24 03:20:28,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:28,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579809660] [2023-08-24 03:20:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:28,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:29,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:29,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579809660] [2023-08-24 03:20:29,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579809660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:29,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556934658] [2023-08-24 03:20:29,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:20:29,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:29,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:29,745 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) [2023-08-24 03:20:29,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-24 03:20:30,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:20:30,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:30,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:20:30,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:30,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:20:30,507 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:20:30,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2023-08-24 03:20:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:20:30,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:31,097 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:20:31,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 51 [2023-08-24 03:20:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:20:34,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556934658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:34,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:34,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 31 [2023-08-24 03:20:34,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709162770] [2023-08-24 03:20:34,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:34,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 03:20:34,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 03:20:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 03:20:34,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 03:20:34,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 2367 transitions, 54253 flow. Second operand has 33 states, 33 states have (on average 74.18181818181819) internal successors, (2448), 33 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:34,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:34,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 03:20:34,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:43,844 INFO L124 PetriNetUnfolderBase]: 10288/15023 cut-off events. [2023-08-24 03:20:43,844 INFO L125 PetriNetUnfolderBase]: For 450285/450285 co-relation queries the response was YES. [2023-08-24 03:20:44,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174296 conditions, 15023 events. 10288/15023 cut-off events. For 450285/450285 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 88615 event pairs, 1080 based on Foata normal form. 2/15025 useless extension candidates. Maximal degree in co-relation 174126. Up to 12012 conditions per place. [2023-08-24 03:20:44,102 INFO L140 encePairwiseOnDemand]: 279/294 looper letters, 2098 selfloop transitions, 887 changer transitions 1/2986 dead transitions. [2023-08-24 03:20:44,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 2986 transitions, 71930 flow [2023-08-24 03:20:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 03:20:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 03:20:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2548 transitions. [2023-08-24 03:20:44,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27956989247311825 [2023-08-24 03:20:44,104 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2548 transitions. [2023-08-24 03:20:44,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2548 transitions. [2023-08-24 03:20:44,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:44,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2548 transitions. [2023-08-24 03:20:44,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 82.19354838709677) internal successors, (2548), 31 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:44,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 294.0) internal successors, (9408), 32 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:44,111 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 294.0) internal successors, (9408), 32 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:44,111 INFO L175 Difference]: Start difference. First operand has 496 places, 2367 transitions, 54253 flow. Second operand 31 states and 2548 transitions. [2023-08-24 03:20:44,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 2986 transitions, 71930 flow [2023-08-24 03:20:53,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 2986 transitions, 70994 flow, removed 466 selfloop flow, removed 2 redundant places. [2023-08-24 03:20:53,162 INFO L231 Difference]: Finished difference. Result has 542 places, 2587 transitions, 61028 flow [2023-08-24 03:20:53,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=53325, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=61028, PETRI_PLACES=542, PETRI_TRANSITIONS=2587} [2023-08-24 03:20:53,163 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 512 predicate places. [2023-08-24 03:20:53,163 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 2587 transitions, 61028 flow [2023-08-24 03:20:53,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 74.18181818181819) internal successors, (2448), 33 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:53,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:53,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:53,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:53,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:53,369 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:20:53,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:53,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1522622735, now seen corresponding path program 10 times [2023-08-24 03:20:53,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:53,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552168071] [2023-08-24 03:20:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:53,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:54,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:54,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552168071] [2023-08-24 03:20:54,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552168071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:54,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86468310] [2023-08-24 03:20:54,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:20:54,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:54,306 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) [2023-08-24 03:20:54,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-24 03:20:54,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:20:54,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:54,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:20:54,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:55,001 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:20:55,004 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:20:55,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 20 [2023-08-24 03:20:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:20:55,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:55,507 INFO L322 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-08-24 03:20:55,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 41 [2023-08-24 03:20:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:20:56,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86468310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:56,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:56,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 29 [2023-08-24 03:20:56,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495149757] [2023-08-24 03:20:56,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:56,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 03:20:56,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:56,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 03:20:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2023-08-24 03:20:56,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 03:20:56,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 2587 transitions, 61028 flow. Second operand has 31 states, 31 states have (on average 74.19354838709677) internal successors, (2300), 31 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:56,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:56,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 03:20:56,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:21:10,852 INFO L124 PetriNetUnfolderBase]: 12422/18011 cut-off events. [2023-08-24 03:21:10,853 INFO L125 PetriNetUnfolderBase]: For 646014/646014 co-relation queries the response was YES. [2023-08-24 03:21:11,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219146 conditions, 18011 events. 12422/18011 cut-off events. For 646014/646014 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 107511 event pairs, 1016 based on Foata normal form. 5/18016 useless extension candidates. Maximal degree in co-relation 218957. Up to 11676 conditions per place. [2023-08-24 03:21:11,185 INFO L140 encePairwiseOnDemand]: 279/294 looper letters, 1731 selfloop transitions, 1764 changer transitions 4/3499 dead transitions. [2023-08-24 03:21:11,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 3499 transitions, 87964 flow [2023-08-24 03:21:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 03:21:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 03:21:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3190 transitions. [2023-08-24 03:21:11,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2782138496424211 [2023-08-24 03:21:11,188 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3190 transitions. [2023-08-24 03:21:11,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3190 transitions. [2023-08-24 03:21:11,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:21:11,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3190 transitions. [2023-08-24 03:21:11,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 81.7948717948718) internal successors, (3190), 39 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:11,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 294.0) internal successors, (11760), 40 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:11,196 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 294.0) internal successors, (11760), 40 states have internal predecessors, (11760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:11,196 INFO L175 Difference]: Start difference. First operand has 542 places, 2587 transitions, 61028 flow. Second operand 39 states and 3190 transitions. [2023-08-24 03:21:11,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 3499 transitions, 87964 flow [2023-08-24 03:21:23,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 3499 transitions, 85328 flow, removed 891 selfloop flow, removed 12 redundant places. [2023-08-24 03:21:23,886 INFO L231 Difference]: Finished difference. Result has 590 places, 3103 transitions, 77064 flow [2023-08-24 03:21:23,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=58831, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1055, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=77064, PETRI_PLACES=590, PETRI_TRANSITIONS=3103} [2023-08-24 03:21:23,888 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 560 predicate places. [2023-08-24 03:21:23,888 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 3103 transitions, 77064 flow [2023-08-24 03:21:23,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 74.19354838709677) internal successors, (2300), 31 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:23,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:21:23,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:21:23,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-24 03:21:24,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:21:24,089 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:21:24,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:21:24,089 INFO L85 PathProgramCache]: Analyzing trace with hash -477465809, now seen corresponding path program 11 times [2023-08-24 03:21:24,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:21:24,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831015196] [2023-08-24 03:21:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:21:24,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:21:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:21:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:25,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:21:25,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831015196] [2023-08-24 03:21:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831015196] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:21:25,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127144667] [2023-08-24 03:21:25,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:21:25,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:21:25,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:21:25,030 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) [2023-08-24 03:21:25,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-24 03:21:25,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:21:25,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:21:25,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 03:21:25,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:21:25,367 INFO L351 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 11 treesize of output 7 [2023-08-24 03:21:25,424 INFO L351 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 6 treesize of output 5 [2023-08-24 03:21:25,481 INFO L351 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 6 treesize of output 5 [2023-08-24 03:21:25,543 INFO L351 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 6 treesize of output 5 [2023-08-24 03:21:25,898 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:21:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:21:25,901 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:21:25,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 15 [2023-08-24 03:21:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:25,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:21:26,667 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_thread3Thread1of1ForFork2_~i~2_229 Int) (v_ArrVal_2953 (Array Int Int)) (v_ArrVal_2952 (Array Int Int))) (or (<= c_~N~0 v_thread3Thread1of1ForFork2_~i~2_229) (< v_thread3Thread1of1ForFork2_~i~2_229 1) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2952) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2953) c_~A~0.base))) (let ((.cse0 (select .cse1 c_~A~0.offset))) (= (mod (+ .cse0 c_~sum1~0 (select .cse1 (+ c_~A~0.offset 4))) 4294967296) (mod (+ .cse0 c_~sum3~0 (select .cse1 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_229 4))) c_~sum2~0) 4294967296)))))) is different from false [2023-08-24 03:21:26,806 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:21:26,807 INFO L351 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 120 treesize of output 85 [2023-08-24 03:21:26,832 INFO L322 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-24 03:21:26,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 302 treesize of output 288 [2023-08-24 03:21:26,856 INFO L322 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-24 03:21:26,856 INFO L351 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 280 treesize of output 232 [2023-08-24 03:21:26,880 INFO L322 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-24 03:21:26,880 INFO L351 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 224 treesize of output 204 [2023-08-24 03:21:26,906 INFO L322 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-24 03:21:26,906 INFO L351 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 104 treesize of output 99 [2023-08-24 03:21:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:35,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127144667] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:21:35,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:21:35,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 03:21:35,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261828748] [2023-08-24 03:21:35,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:21:35,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 03:21:35,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:21:35,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 03:21:35,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1345, Unknown=7, NotChecked=76, Total=1640 [2023-08-24 03:21:35,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 03:21:35,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 3103 transitions, 77064 flow. Second operand has 41 states, 41 states have (on average 73.90243902439025) internal successors, (3030), 41 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:35,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:21:35,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 03:21:35,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:21:44,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:21:53,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:21:56,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:21:59,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:21:59,551 INFO L124 PetriNetUnfolderBase]: 13753/19912 cut-off events. [2023-08-24 03:21:59,551 INFO L125 PetriNetUnfolderBase]: For 787914/787914 co-relation queries the response was YES. [2023-08-24 03:22:00,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254489 conditions, 19912 events. 13753/19912 cut-off events. For 787914/787914 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 120045 event pairs, 1404 based on Foata normal form. 6/19918 useless extension candidates. Maximal degree in co-relation 254277. Up to 16495 conditions per place. [2023-08-24 03:22:00,273 INFO L140 encePairwiseOnDemand]: 279/294 looper letters, 2731 selfloop transitions, 935 changer transitions 3/3669 dead transitions. [2023-08-24 03:22:00,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 3669 transitions, 96601 flow [2023-08-24 03:22:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 03:22:00,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 03:22:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2626 transitions. [2023-08-24 03:22:00,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27912414965986393 [2023-08-24 03:22:00,276 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2626 transitions. [2023-08-24 03:22:00,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2626 transitions. [2023-08-24 03:22:00,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:22:00,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2626 transitions. [2023-08-24 03:22:00,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 82.0625) internal successors, (2626), 32 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:00,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 294.0) internal successors, (9702), 33 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) [2023-08-24 03:22:00,282 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 294.0) internal successors, (9702), 33 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) [2023-08-24 03:22:00,282 INFO L175 Difference]: Start difference. First operand has 590 places, 3103 transitions, 77064 flow. Second operand 32 states and 2626 transitions. [2023-08-24 03:22:00,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 3669 transitions, 96601 flow [2023-08-24 03:22:18,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 3669 transitions, 92453 flow, removed 1716 selfloop flow, removed 11 redundant places. [2023-08-24 03:22:18,964 INFO L231 Difference]: Finished difference. Result has 632 places, 3392 transitions, 83787 flow [2023-08-24 03:22:18,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=73374, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=83787, PETRI_PLACES=632, PETRI_TRANSITIONS=3392} [2023-08-24 03:22:18,966 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 602 predicate places. [2023-08-24 03:22:18,966 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 3392 transitions, 83787 flow [2023-08-24 03:22:18,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 73.90243902439025) internal successors, (3030), 41 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:18,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:22:18,966 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:22:18,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-08-24 03:22:19,166 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,SelfDestructingSolverStorable65 [2023-08-24 03:22:19,167 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:22:19,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:22:19,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1172137689, now seen corresponding path program 12 times [2023-08-24 03:22:19,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:22:19,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642064630] [2023-08-24 03:22:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:22:19,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:22:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:22:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:22:20,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:22:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642064630] [2023-08-24 03:22:20,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642064630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:22:20,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13961496] [2023-08-24 03:22:20,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:22:20,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:22:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:22:20,172 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) [2023-08-24 03:22:20,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-24 03:22:20,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:22:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:22:20,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 03:22:20,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:22:21,063 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:22:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:22:21,066 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:22:21,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 15 [2023-08-24 03:22:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:22:21,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:22:21,482 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:22:21,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 59 [2023-08-24 03:22:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:22:31,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13961496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:22:31,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:22:31,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-24 03:22:31,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571042383] [2023-08-24 03:22:31,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:22:31,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 03:22:31,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:22:31,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 03:22:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 03:22:31,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 03:22:31,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 3392 transitions, 83787 flow. Second operand has 37 states, 37 states have (on average 74.10810810810811) internal successors, (2742), 37 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:31,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:22:31,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 03:22:31,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:22:50,790 INFO L124 PetriNetUnfolderBase]: 16170/23389 cut-off events. [2023-08-24 03:22:50,790 INFO L125 PetriNetUnfolderBase]: For 899409/899409 co-relation queries the response was YES. [2023-08-24 03:22:51,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295749 conditions, 23389 events. 16170/23389 cut-off events. For 899409/899409 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 143778 event pairs, 1583 based on Foata normal form. 3/23392 useless extension candidates. Maximal degree in co-relation 295515. Up to 17584 conditions per place. [2023-08-24 03:22:51,881 INFO L140 encePairwiseOnDemand]: 279/294 looper letters, 2828 selfloop transitions, 1386 changer transitions 8/4222 dead transitions. [2023-08-24 03:22:51,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 4222 transitions, 111270 flow [2023-08-24 03:22:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 03:22:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 03:22:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2470 transitions. [2023-08-24 03:22:51,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2800453514739229 [2023-08-24 03:22:51,884 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2470 transitions. [2023-08-24 03:22:51,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2470 transitions. [2023-08-24 03:22:51,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:22:51,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2470 transitions. [2023-08-24 03:22:51,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 82.33333333333333) internal successors, (2470), 30 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:51,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 294.0) internal successors, (9114), 31 states have internal predecessors, (9114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:51,892 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 294.0) internal successors, (9114), 31 states have internal predecessors, (9114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:51,892 INFO L175 Difference]: Start difference. First operand has 632 places, 3392 transitions, 83787 flow. Second operand 30 states and 2470 transitions. [2023-08-24 03:22:51,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 4222 transitions, 111270 flow [2023-08-24 03:23:15,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 4222 transitions, 109189 flow, removed 932 selfloop flow, removed 6 redundant places. [2023-08-24 03:23:15,878 INFO L231 Difference]: Finished difference. Result has 672 places, 3881 transitions, 99624 flow [2023-08-24 03:23:15,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=82068, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=988, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=99624, PETRI_PLACES=672, PETRI_TRANSITIONS=3881} [2023-08-24 03:23:15,880 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 642 predicate places. [2023-08-24 03:23:15,880 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 3881 transitions, 99624 flow [2023-08-24 03:23:15,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 74.10810810810811) internal successors, (2742), 37 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:23:15,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:23:15,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:23:15,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-24 03:23:16,081 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,SelfDestructingSolverStorable66 [2023-08-24 03:23:16,081 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:23:16,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:23:16,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1584820943, now seen corresponding path program 13 times [2023-08-24 03:23:16,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:23:16,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63332986] [2023-08-24 03:23:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:23:16,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:23:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:23:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:23:16,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:23:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63332986] [2023-08-24 03:23:16,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63332986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:23:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064448967] [2023-08-24 03:23:16,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:23:16,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:23:16,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:23:16,708 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) [2023-08-24 03:23:16,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-24 03:23:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:23:17,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-24 03:23:17,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:23:17,163 INFO L351 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 11 treesize of output 7 [2023-08-24 03:23:17,253 INFO L351 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 28 treesize of output 23 [2023-08-24 03:23:17,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:23:17,334 INFO L351 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 39 treesize of output 35 [2023-08-24 03:23:17,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:23:17,419 INFO L351 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 39 treesize of output 35 [2023-08-24 03:23:17,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:23:17,510 INFO L351 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 39 treesize of output 35 [2023-08-24 03:23:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:23:18,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:23:18,098 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:23:18,098 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 31 [2023-08-24 03:23:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:23:18,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:23:18,829 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3055 (Array Int Int)) (v_ArrVal_3056 (Array Int Int)) (v_thread3Thread1of1ForFork2_~i~2_237 Int)) (or (<= c_~N~0 v_thread3Thread1of1ForFork2_~i~2_237) (< v_thread3Thread1of1ForFork2_~i~2_237 1) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3055) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3056) c_~A~0.base))) (let ((.cse0 (select .cse1 c_~A~0.offset))) (= (mod (+ .cse0 c_~sum3~0 c_~sum2~0 (select .cse1 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_237 4)))) 4294967296) (mod (+ .cse0 c_~sum1~0 (select .cse1 (+ c_~A~0.offset 4))) 4294967296)))))) is different from false [2023-08-24 03:23:20,052 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:23:20,053 INFO L351 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 2 case distinctions, treesize of input 152 treesize of output 98 [2023-08-24 03:23:20,154 INFO L322 Elim1Store]: treesize reduction 8, result has 88.4 percent of original size [2023-08-24 03:23:20,155 INFO L351 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 352 treesize of output 356 [2023-08-24 03:23:20,183 INFO L322 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-24 03:23:20,184 INFO L351 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 280 treesize of output 232 [2023-08-24 03:23:20,214 INFO L322 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-24 03:23:20,214 INFO L351 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 224 treesize of output 204 [2023-08-24 03:23:20,243 INFO L322 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-08-24 03:23:20,243 INFO L351 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 104 treesize of output 99 [2023-08-24 03:24:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:24:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064448967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:24:26,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:24:26,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2023-08-24 03:24:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23197167] [2023-08-24 03:24:26,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:24:26,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 03:24:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:24:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 03:24:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1201, Unknown=5, NotChecked=72, Total=1482 [2023-08-24 03:24:26,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 294 [2023-08-24 03:24:26,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 3881 transitions, 99624 flow. Second operand has 39 states, 39 states have (on average 74.0) internal successors, (2886), 39 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:24:26,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:24:26,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 294 [2023-08-24 03:24:26,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:24:50,210 INFO L124 PetriNetUnfolderBase]: 16495/23875 cut-off events. [2023-08-24 03:24:50,210 INFO L125 PetriNetUnfolderBase]: For 947860/947860 co-relation queries the response was YES. [2023-08-24 03:24:51,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307959 conditions, 23875 events. 16495/23875 cut-off events. For 947860/947860 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 147207 event pairs, 1818 based on Foata normal form. 4/23879 useless extension candidates. Maximal degree in co-relation 307707. Up to 21741 conditions per place. [2023-08-24 03:24:51,188 INFO L140 encePairwiseOnDemand]: 279/294 looper letters, 3532 selfloop transitions, 609 changer transitions 3/4144 dead transitions. [2023-08-24 03:24:51,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 696 places, 4144 transitions, 113221 flow [2023-08-24 03:24:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 03:24:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 03:24:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2038 transitions. [2023-08-24 03:24:51,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27727891156462586 [2023-08-24 03:24:51,190 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2038 transitions. [2023-08-24 03:24:51,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2038 transitions. [2023-08-24 03:24:51,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:24:51,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2038 transitions. [2023-08-24 03:24:51,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 81.52) internal successors, (2038), 25 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:24:51,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 294.0) internal successors, (7644), 26 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:24:51,195 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 294.0) internal successors, (7644), 26 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:24:51,195 INFO L175 Difference]: Start difference. First operand has 672 places, 3881 transitions, 99624 flow. Second operand 25 states and 2038 transitions. [2023-08-24 03:24:51,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 696 places, 4144 transitions, 113221 flow [2023-08-24 03:25:17,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 4144 transitions, 110426 flow, removed 1290 selfloop flow, removed 7 redundant places. [2023-08-24 03:25:17,937 INFO L231 Difference]: Finished difference. Result has 697 places, 3933 transitions, 100019 flow [2023-08-24 03:25:17,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=96855, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=562, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=100019, PETRI_PLACES=697, PETRI_TRANSITIONS=3933} [2023-08-24 03:25:17,939 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 667 predicate places. [2023-08-24 03:25:17,939 INFO L495 AbstractCegarLoop]: Abstraction has has 697 places, 3933 transitions, 100019 flow [2023-08-24 03:25:17,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 74.0) internal successors, (2886), 39 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:25:17,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:25:17,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:25:17,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-24 03:25:18,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:25:18,140 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:25:18,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:25:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash 966239839, now seen corresponding path program 22 times [2023-08-24 03:25:18,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:25:18,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811965298] [2023-08-24 03:25:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:25:18,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:25:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:25:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:25:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:25:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811965298] [2023-08-24 03:25:19,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811965298] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:25:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324856086] [2023-08-24 03:25:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:25:19,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:25:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:25:19,109 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) [2023-08-24 03:25:19,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-24 03:25:19,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:25:19,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:25:19,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 03:25:19,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:25:20,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:25:20,114 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:25:20,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:25:20,115 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:25:20,119 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:25:20,120 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 17 [2023-08-24 03:25:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:25:20,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:25:20,482 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:25:20,483 INFO L351 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 48 treesize of output 51 [2023-08-24 03:25:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:25:28,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324856086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:25:28,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:25:28,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 32 [2023-08-24 03:25:28,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657983535] [2023-08-24 03:25:28,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:25:28,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 03:25:28,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:25:28,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 03:25:28,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 03:25:28,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 294 [2023-08-24 03:25:28,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 3933 transitions, 100019 flow. Second operand has 34 states, 34 states have (on average 84.20588235294117) internal successors, (2863), 34 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:25:28,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:25:28,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 294 [2023-08-24 03:25:28,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:25:40,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:25:45,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-08-24 03:25:46,066 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 03:25:46,066 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 [2023-08-24 03:25:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 03:25:46,341 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 03:25:46,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-24 03:25:46,545 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,SelfDestructingSolverStorable68 [2023-08-24 03:25:46,545 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (34states, 82/294 universal loopers) in iteration 69,while PetriNetUnfolder was constructing finite prefix that currently has 54711 conditions, 4170 events (2821/4169 cut-off events. For 182208/182208 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 26082 event pairs, 298 based on Foata normal form. 0/5226 useless extension candidates. Maximal degree in co-relation 54450. Up to 3172 conditions per place.). [2023-08-24 03:25:46,546 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 03:25:46,546 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 03:25:46,546 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 03:25:46,546 INFO L445 BasicCegarLoop]: Path program histogram: [23, 22, 13, 6, 1, 1, 1, 1, 1] [2023-08-24 03:25:46,548 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 03:25:46,548 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 03:25:46,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:25:46 BasicIcfg [2023-08-24 03:25:46,550 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 03:25:46,550 INFO L158 Benchmark]: Toolchain (without parser) took 771871.34ms. Allocated memory was 354.4MB in the beginning and 13.1GB in the end (delta: 12.8GB). Free memory was 331.1MB in the beginning and 10.5GB in the end (delta: -10.2GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. [2023-08-24 03:25:46,550 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 354.4MB. Free memory was 331.6MB in the beginning and 331.5MB in the end (delta: 125.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 03:25:46,550 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.15ms. Allocated memory is still 354.4MB. Free memory was 330.6MB in the beginning and 319.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 03:25:46,551 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.31ms. Allocated memory is still 354.4MB. Free memory was 319.2MB in the beginning and 317.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 03:25:46,551 INFO L158 Benchmark]: Boogie Preprocessor took 31.96ms. Allocated memory is still 354.4MB. Free memory was 317.6MB in the beginning and 316.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 03:25:46,551 INFO L158 Benchmark]: RCFGBuilder took 459.07ms. Allocated memory is still 354.4MB. Free memory was 316.0MB in the beginning and 299.6MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 03:25:46,551 INFO L158 Benchmark]: TraceAbstraction took 771100.80ms. Allocated memory was 354.4MB in the beginning and 13.1GB in the end (delta: 12.8GB). Free memory was 299.2MB in the beginning and 10.5GB in the end (delta: -10.2GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. [2023-08-24 03:25:46,552 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 354.4MB. Free memory was 331.6MB in the beginning and 331.5MB in the end (delta: 125.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 244.15ms. Allocated memory is still 354.4MB. Free memory was 330.6MB in the beginning and 319.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.31ms. Allocated memory is still 354.4MB. Free memory was 319.2MB in the beginning and 317.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.96ms. Allocated memory is still 354.4MB. Free memory was 317.6MB in the beginning and 316.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 459.07ms. Allocated memory is still 354.4MB. Free memory was 316.0MB in the beginning and 299.6MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 771100.80ms. Allocated memory was 354.4MB in the beginning and 13.1GB in the end (delta: 12.8GB). Free memory was 299.2MB in the beginning and 10.5GB in the end (delta: -10.2GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 140 PlacesBefore, 30 PlacesAfterwards, 142 TransitionsBefore, 24 TransitionsAfterwards, 1950 CoEnabledTransitionPairs, 7 FixpointIterations, 71 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 139 TotalNumberOfCompositions, 2032 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1914, independent: 1894, independent conditional: 0, independent unconditional: 1894, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1038, independent: 1027, independent conditional: 0, independent unconditional: 1027, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1914, independent: 867, independent conditional: 0, independent unconditional: 867, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 1038, unknown conditional: 0, unknown unconditional: 1038] , Statistics on independence cache: Total cache size (in pairs): 54, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (34states, 82/294 universal loopers) in iteration 69,while PetriNetUnfolder was constructing finite prefix that currently has 54711 conditions, 4170 events (2821/4169 cut-off events. For 182208/182208 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 26082 event pairs, 298 based on Foata normal form. 0/5226 useless extension candidates. Maximal degree in co-relation 54450. Up to 3172 conditions per place.). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (34states, 82/294 universal loopers) in iteration 69,while PetriNetUnfolder was constructing finite prefix that currently has 54711 conditions, 4170 events (2821/4169 cut-off events. For 182208/182208 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 26082 event pairs, 298 based on Foata normal form. 0/5226 useless extension candidates. Maximal degree in co-relation 54450. Up to 3172 conditions per place.). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (34states, 82/294 universal loopers) in iteration 69,while PetriNetUnfolder was constructing finite prefix that currently has 54711 conditions, 4170 events (2821/4169 cut-off events. For 182208/182208 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 26082 event pairs, 298 based on Foata normal form. 0/5226 useless extension candidates. Maximal degree in co-relation 54450. Up to 3172 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (34states, 82/294 universal loopers) in iteration 69,while PetriNetUnfolder was constructing finite prefix that currently has 54711 conditions, 4170 events (2821/4169 cut-off events. For 182208/182208 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 26082 event pairs, 298 based on Foata normal form. 0/5226 useless extension candidates. Maximal degree in co-relation 54450. Up to 3172 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 183 locations, 4 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: 770.9s, OverallIterations: 69, TraceHistogramMax: 2, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 538.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 253 mSolverCounterUnknown, 8778 SdHoareTripleChecker+Valid, 70.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8778 mSDsluCounter, 3184 SdHoareTripleChecker+Invalid, 65.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2980 IncrementalHoareTripleChecker+Unchecked, 2804 mSDsCounter, 592 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 47526 IncrementalHoareTripleChecker+Invalid, 51351 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 592 mSolverCounterUnsat, 380 mSDtfsCounter, 47526 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4206 GetRequests, 2115 SyntacticMatches, 130 SemanticMatches, 1961 ConstructedPredicates, 26 IntricatePredicates, 0 DeprecatedPredicates, 18632 ImplicationChecksByTransitivity, 80.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100019occurred in iteration=68, InterpolantAutomatonStates: 1059, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 4.1s SatisfiabilityAnalysisTime, 202.8s InterpolantComputationTime, 3179 NumberOfCodeBlocks, 3147 NumberOfCodeBlocksAsserted, 183 NumberOfCheckSat, 4528 ConstructedInterpolants, 184 QuantifiedInterpolants, 63759 SizeOfPredicates, 558 NumberOfNonLiveVariables, 14130 ConjunctsInSsa, 1628 ConjunctsInUnsatCore, 199 InterpolantComputations, 9 PerfectInterpolantSequences, 328/888 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