/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 --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:59:37,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:59:38,028 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 14:59:38,031 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:59:38,032 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:59:38,063 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:59:38,064 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:59:38,064 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:59:38,065 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:59:38,067 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:59:38,067 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:59:38,068 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:59:38,068 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:59:38,069 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:59:38,069 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:59:38,069 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:59:38,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:59:38,069 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:59:38,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:59:38,070 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:59:38,070 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:59:38,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:59:38,071 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:59:38,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:59:38,071 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:59:38,071 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:59:38,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:59:38,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:59:38,072 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:59:38,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:59:38,073 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:59:38,073 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:59:38,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:59:38,073 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:59:38,073 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:59:38,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:59:38,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:59:38,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:59:38,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:59:38,338 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:59:38,340 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:59:38,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-08-24 14:59:39,350 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:59:39,533 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:59:39,534 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-08-24 14:59:39,539 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97b7e651/f7b9eb2e3e734a649bb1ff666cb955b8/FLAGb0bad863e [2023-08-24 14:59:39,547 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97b7e651/f7b9eb2e3e734a649bb1ff666cb955b8 [2023-08-24 14:59:39,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:59:39,549 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:59:39,550 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:59:39,550 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:59:39,552 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:59:39,552 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,553 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45307275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39, skipping insertion in model container [2023-08-24 14:59:39,553 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,566 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:59:39,658 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-08-24 14:59:39,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:59:39,667 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:59:39,679 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-08-24 14:59:39,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:59:39,690 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:59:39,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39 WrapperNode [2023-08-24 14:59:39,690 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:59:39,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:59:39,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:59:39,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:59:39,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,740 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 281 [2023-08-24 14:59:39,740 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:59:39,740 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:59:39,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:59:39,741 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:59:39,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,756 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,756 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,764 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,778 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,780 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:59:39,781 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:59:39,781 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:59:39,781 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:59:39,782 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (1/1) ... [2023-08-24 14:59:39,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:59:39,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:39,810 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 14:59:39,827 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 14:59:39,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:59:39,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:59:39,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:59:39,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:59:39,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:59:39,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:59:39,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:59:39,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:59:39,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 14:59:39,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 14:59:39,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:59:39,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 14:59:39,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:59:39,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:59:39,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:59:39,839 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 14:59:39,937 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:59:39,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:59:40,257 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:59:40,263 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:59:40,264 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 14:59:40,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:59:40 BoogieIcfgContainer [2023-08-24 14:59:40,265 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:59:40,267 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:59:40,267 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:59:40,269 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:59:40,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:59:39" (1/3) ... [2023-08-24 14:59:40,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d838852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:59:40, skipping insertion in model container [2023-08-24 14:59:40,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:59:39" (2/3) ... [2023-08-24 14:59:40,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d838852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:59:40, skipping insertion in model container [2023-08-24 14:59:40,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:59:40" (3/3) ... [2023-08-24 14:59:40,270 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-08-24 14:59:40,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:59:40,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:59:40,289 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:59:40,374 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 14:59:40,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 327 transitions, 678 flow [2023-08-24 14:59:40,501 INFO L124 PetriNetUnfolderBase]: 29/324 cut-off events. [2023-08-24 14:59:40,501 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:59:40,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 324 events. 29/324 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 444 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 218. Up to 2 conditions per place. [2023-08-24 14:59:40,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 327 transitions, 678 flow [2023-08-24 14:59:40,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 295 places, 314 transitions, 646 flow [2023-08-24 14:59:40,519 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:59:40,525 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 314 transitions, 646 flow [2023-08-24 14:59:40,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 314 transitions, 646 flow [2023-08-24 14:59:40,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 314 transitions, 646 flow [2023-08-24 14:59:40,585 INFO L124 PetriNetUnfolderBase]: 29/314 cut-off events. [2023-08-24 14:59:40,585 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:59:40,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 314 events. 29/314 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 443 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 218. Up to 2 conditions per place. [2023-08-24 14:59:40,591 INFO L119 LiptonReduction]: Number of co-enabled transitions 13388 [2023-08-24 14:59:47,787 INFO L134 LiptonReduction]: Checked pairs total: 13040 [2023-08-24 14:59:47,787 INFO L136 LiptonReduction]: Total number of compositions: 368 [2023-08-24 14:59:47,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:59:47,802 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;@5e4b660d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:59:47,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 14:59:47,807 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:59:47,807 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-08-24 14:59:47,807 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:59:47,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:47,808 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 14:59:47,808 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 14:59:47,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:47,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1559945570, now seen corresponding path program 1 times [2023-08-24 14:59:47,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:47,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801690333] [2023-08-24 14:59:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:47,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:48,378 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 14:59:48,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:48,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801690333] [2023-08-24 14:59:48,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801690333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:59:48,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:59:48,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 14:59:48,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239553265] [2023-08-24 14:59:48,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:48,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:59:48,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:48,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:59:48,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:59:48,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 695 [2023-08-24 14:59:48,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:48,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 695 [2023-08-24 14:59:48,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:48,503 INFO L124 PetriNetUnfolderBase]: 362/512 cut-off events. [2023-08-24 14:59:48,503 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-24 14:59:48,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076 conditions, 512 events. 362/512 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1625 event pairs, 39 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-08-24 14:59:48,506 INFO L140 encePairwiseOnDemand]: 690/695 looper letters, 36 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2023-08-24 14:59:48,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 203 flow [2023-08-24 14:59:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:59:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:59:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-08-24 14:59:48,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4316546762589928 [2023-08-24 14:59:48,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-08-24 14:59:48,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-08-24 14:59:48,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:48,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-08-24 14:59:48,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 695.0) internal successors, (2780), 4 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 695.0) internal successors, (2780), 4 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,537 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 900 transitions. [2023-08-24 14:59:48,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 203 flow [2023-08-24 14:59:48,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 44 transitions, 181 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 14:59:48,543 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 88 flow [2023-08-24 14:59:48,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2023-08-24 14:59:48,546 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-24 14:59:48,546 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 88 flow [2023-08-24 14:59:48,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:48,547 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 14:59:48,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:59:48,548 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 14:59:48,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:48,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1846036056, now seen corresponding path program 1 times [2023-08-24 14:59:48,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:48,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261932458] [2023-08-24 14:59:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:48,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:48,644 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 14:59:48,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:48,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261932458] [2023-08-24 14:59:48,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261932458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:59:48,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:59:48,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:59:48,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668633024] [2023-08-24 14:59:48,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:48,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:59:48,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:59:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:59:48,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 695 [2023-08-24 14:59:48,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 249.2) internal successors, (1246), 5 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:48,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 695 [2023-08-24 14:59:48,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:48,803 INFO L124 PetriNetUnfolderBase]: 617/936 cut-off events. [2023-08-24 14:59:48,803 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-08-24 14:59:48,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2271 conditions, 936 events. 617/936 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3848 event pairs, 279 based on Foata normal form. 34/944 useless extension candidates. Maximal degree in co-relation 523. Up to 480 conditions per place. [2023-08-24 14:59:48,808 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 59 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2023-08-24 14:59:48,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 76 transitions, 356 flow [2023-08-24 14:59:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:59:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:59:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1538 transitions. [2023-08-24 14:59:48,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3688249400479616 [2023-08-24 14:59:48,812 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1538 transitions. [2023-08-24 14:59:48,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1538 transitions. [2023-08-24 14:59:48,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:48,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1538 transitions. [2023-08-24 14:59:48,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.3333333333333) internal successors, (1538), 6 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 695.0) internal successors, (4865), 7 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,822 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 695.0) internal successors, (4865), 7 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,822 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 88 flow. Second operand 6 states and 1538 transitions. [2023-08-24 14:59:48,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 76 transitions, 356 flow [2023-08-24 14:59:48,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 76 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 14:59:48,824 INFO L231 Difference]: Finished difference. Result has 37 places, 44 transitions, 188 flow [2023-08-24 14:59:48,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=37, PETRI_TRANSITIONS=44} [2023-08-24 14:59:48,825 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-08-24 14:59:48,826 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 44 transitions, 188 flow [2023-08-24 14:59:48,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 249.2) internal successors, (1246), 5 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:48,827 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 14:59:48,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 14:59:48,829 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 14:59:48,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:48,834 INFO L85 PathProgramCache]: Analyzing trace with hash 983849383, now seen corresponding path program 1 times [2023-08-24 14:59:48,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:48,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552967824] [2023-08-24 14:59:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:48,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:48,909 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 14:59:48,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552967824] [2023-08-24 14:59:48,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552967824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:59:48,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:59:48,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:59:48,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425053282] [2023-08-24 14:59:48,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:48,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:59:48,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:59:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:59:48,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 695 [2023-08-24 14:59:48,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 44 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 249.2) internal successors, (1246), 5 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:48,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:48,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 695 [2023-08-24 14:59:48,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:49,063 INFO L124 PetriNetUnfolderBase]: 489/767 cut-off events. [2023-08-24 14:59:49,063 INFO L125 PetriNetUnfolderBase]: For 513/575 co-relation queries the response was YES. [2023-08-24 14:59:49,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1985 conditions, 767 events. 489/767 cut-off events. For 513/575 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3171 event pairs, 230 based on Foata normal form. 90/846 useless extension candidates. Maximal degree in co-relation 1296. Up to 490 conditions per place. [2023-08-24 14:59:49,066 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 55 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2023-08-24 14:59:49,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 420 flow [2023-08-24 14:59:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:59:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:59:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1536 transitions. [2023-08-24 14:59:49,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683453237410072 [2023-08-24 14:59:49,069 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1536 transitions. [2023-08-24 14:59:49,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1536 transitions. [2023-08-24 14:59:49,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:49,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1536 transitions. [2023-08-24 14:59:49,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.0) internal successors, (1536), 6 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 695.0) internal successors, (4865), 7 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,077 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 695.0) internal successors, (4865), 7 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,077 INFO L175 Difference]: Start difference. First operand has 37 places, 44 transitions, 188 flow. Second operand 6 states and 1536 transitions. [2023-08-24 14:59:49,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 420 flow [2023-08-24 14:59:49,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 73 transitions, 420 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 14:59:49,079 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 239 flow [2023-08-24 14:59:49,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-08-24 14:59:49,080 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 12 predicate places. [2023-08-24 14:59:49,080 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 239 flow [2023-08-24 14:59:49,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 249.2) internal successors, (1246), 5 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:49,081 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 14:59:49,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 14:59:49,081 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 14:59:49,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:49,081 INFO L85 PathProgramCache]: Analyzing trace with hash -661782300, now seen corresponding path program 1 times [2023-08-24 14:59:49,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:49,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080281333] [2023-08-24 14:59:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:49,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:49,145 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 14:59:49,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:49,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080281333] [2023-08-24 14:59:49,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080281333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:59:49,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:59:49,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:59:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233144983] [2023-08-24 14:59:49,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:49,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:59:49,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:59:49,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:59:49,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 695 [2023-08-24 14:59:49,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 239 flow. Second operand has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:49,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 695 [2023-08-24 14:59:49,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:49,254 INFO L124 PetriNetUnfolderBase]: 427/653 cut-off events. [2023-08-24 14:59:49,255 INFO L125 PetriNetUnfolderBase]: For 748/822 co-relation queries the response was YES. [2023-08-24 14:59:49,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 653 events. 427/653 cut-off events. For 748/822 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2468 event pairs, 223 based on Foata normal form. 88/734 useless extension candidates. Maximal degree in co-relation 1520. Up to 521 conditions per place. [2023-08-24 14:59:49,257 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 26 selfloop transitions, 6 changer transitions 35/69 dead transitions. [2023-08-24 14:59:49,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 443 flow [2023-08-24 14:59:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:59:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:59:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1515 transitions. [2023-08-24 14:59:49,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36330935251798563 [2023-08-24 14:59:49,260 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1515 transitions. [2023-08-24 14:59:49,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1515 transitions. [2023-08-24 14:59:49,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:49,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1515 transitions. [2023-08-24 14:59:49,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 252.5) internal successors, (1515), 6 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 695.0) internal successors, (4865), 7 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,269 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 695.0) internal successors, (4865), 7 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,269 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 239 flow. Second operand 6 states and 1515 transitions. [2023-08-24 14:59:49,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 443 flow [2023-08-24 14:59:49,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 422 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 14:59:49,271 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 156 flow [2023-08-24 14:59:49,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-08-24 14:59:49,271 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-08-24 14:59:49,272 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 156 flow [2023-08-24 14:59:49,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:49,272 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, 1, 1] [2023-08-24 14:59:49,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 14:59:49,273 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 14:59:49,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:49,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1161612982, now seen corresponding path program 1 times [2023-08-24 14:59:49,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:49,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439984554] [2023-08-24 14:59:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:49,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:59:49,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:49,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439984554] [2023-08-24 14:59:49,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439984554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:49,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881766219] [2023-08-24 14:59:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:49,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:49,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:49,343 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 14:59:49,394 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 14:59:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:49,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 14:59:49,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:59:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:59:49,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:59:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:59:49,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881766219] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:49,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 14:59:49,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 14:59:49,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427519853] [2023-08-24 14:59:49,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:49,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:59:49,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:49,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:59:49,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:59:49,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 695 [2023-08-24 14:59:49,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 249.8) internal successors, (1249), 5 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 14:59:49,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:49,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 695 [2023-08-24 14:59:49,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:49,692 INFO L124 PetriNetUnfolderBase]: 378/548 cut-off events. [2023-08-24 14:59:49,692 INFO L125 PetriNetUnfolderBase]: For 567/567 co-relation queries the response was YES. [2023-08-24 14:59:49,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 548 events. 378/548 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1917 event pairs, 114 based on Foata normal form. 42/567 useless extension candidates. Maximal degree in co-relation 1670. Up to 393 conditions per place. [2023-08-24 14:59:49,696 INFO L140 encePairwiseOnDemand]: 690/695 looper letters, 39 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-24 14:59:49,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 292 flow [2023-08-24 14:59:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:59:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:59:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1263 transitions. [2023-08-24 14:59:49,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36345323741007196 [2023-08-24 14:59:49,700 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1263 transitions. [2023-08-24 14:59:49,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1263 transitions. [2023-08-24 14:59:49,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:49,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1263 transitions. [2023-08-24 14:59:49,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 252.6) internal successors, (1263), 5 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 695.0) internal successors, (4170), 6 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,706 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 695.0) internal successors, (4170), 6 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:49,706 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 156 flow. Second operand 5 states and 1263 transitions. [2023-08-24 14:59:49,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 292 flow [2023-08-24 14:59:49,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 232 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-08-24 14:59:49,709 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 129 flow [2023-08-24 14:59:49,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-08-24 14:59:49,711 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-24 14:59:49,711 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 129 flow [2023-08-24 14:59:49,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 249.8) internal successors, (1249), 5 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 14:59:49,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:49,712 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, 1, 1] [2023-08-24 14:59:49,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 14:59:49,931 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 14:59:49,931 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 14:59:49,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash 370826187, now seen corresponding path program 1 times [2023-08-24 14:59:49,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:49,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810639192] [2023-08-24 14:59:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:49,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:59:50,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:50,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810639192] [2023-08-24 14:59:50,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810639192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:50,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596597773] [2023-08-24 14:59:50,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:50,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:50,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:50,017 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 14:59:50,018 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 14:59:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:50,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 14:59:50,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:59:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:59:50,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:59:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:59:50,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596597773] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:50,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 14:59:50,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 14:59:50,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838076351] [2023-08-24 14:59:50,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:50,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:59:50,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:50,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:59:50,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:59:50,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 695 [2023-08-24 14:59:50,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 249.8) internal successors, (1249), 5 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 14:59:50,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:50,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 695 [2023-08-24 14:59:50,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:50,272 INFO L124 PetriNetUnfolderBase]: 297/441 cut-off events. [2023-08-24 14:59:50,272 INFO L125 PetriNetUnfolderBase]: For 283/345 co-relation queries the response was YES. [2023-08-24 14:59:50,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 441 events. 297/441 cut-off events. For 283/345 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1362 event pairs, 93 based on Foata normal form. 90/509 useless extension candidates. Maximal degree in co-relation 1209. Up to 337 conditions per place. [2023-08-24 14:59:50,274 INFO L140 encePairwiseOnDemand]: 690/695 looper letters, 41 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-08-24 14:59:50,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 48 transitions, 271 flow [2023-08-24 14:59:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:59:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:59:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1263 transitions. [2023-08-24 14:59:50,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36345323741007196 [2023-08-24 14:59:50,277 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1263 transitions. [2023-08-24 14:59:50,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1263 transitions. [2023-08-24 14:59:50,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:50,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1263 transitions. [2023-08-24 14:59:50,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 252.6) internal successors, (1263), 5 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:50,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 695.0) internal successors, (4170), 6 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:50,282 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 695.0) internal successors, (4170), 6 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:50,283 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 129 flow. Second operand 5 states and 1263 transitions. [2023-08-24 14:59:50,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 48 transitions, 271 flow [2023-08-24 14:59:50,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 254 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 14:59:50,284 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 139 flow [2023-08-24 14:59:50,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-08-24 14:59:50,284 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-08-24 14:59:50,284 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 139 flow [2023-08-24 14:59:50,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 249.8) internal successors, (1249), 5 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 14:59:50,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:50,285 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, 1, 1, 1] [2023-08-24 14:59:50,292 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 14:59:50,490 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 14:59:50,490 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 14:59:50,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1419956551, now seen corresponding path program 1 times [2023-08-24 14:59:50,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:50,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516386928] [2023-08-24 14:59:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:50,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 14:59:50,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:50,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516386928] [2023-08-24 14:59:50,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516386928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:50,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641689081] [2023-08-24 14:59:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:50,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:50,577 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 14:59:50,586 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 14:59:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:50,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 14:59:50,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:59:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 14:59:50,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:59:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 14:59:50,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641689081] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:50,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 14:59:50,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 14:59:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929923467] [2023-08-24 14:59:50,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:59:50,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:59:50,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:59:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:59:50,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 695 [2023-08-24 14:59:50,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:50,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:50,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 695 [2023-08-24 14:59:50,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:50,844 INFO L124 PetriNetUnfolderBase]: 282/422 cut-off events. [2023-08-24 14:59:50,844 INFO L125 PetriNetUnfolderBase]: For 431/551 co-relation queries the response was YES. [2023-08-24 14:59:50,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 422 events. 282/422 cut-off events. For 431/551 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1260 event pairs, 114 based on Foata normal form. 146/564 useless extension candidates. Maximal degree in co-relation 1233. Up to 333 conditions per place. [2023-08-24 14:59:50,846 INFO L140 encePairwiseOnDemand]: 690/695 looper letters, 43 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-08-24 14:59:50,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 293 flow [2023-08-24 14:59:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:59:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:59:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1248 transitions. [2023-08-24 14:59:50,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359136690647482 [2023-08-24 14:59:50,849 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1248 transitions. [2023-08-24 14:59:50,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1248 transitions. [2023-08-24 14:59:50,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:50,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1248 transitions. [2023-08-24 14:59:50,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 249.6) internal successors, (1248), 5 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:50,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 695.0) internal successors, (4170), 6 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:50,854 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 695.0) internal successors, (4170), 6 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:50,855 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 139 flow. Second operand 5 states and 1248 transitions. [2023-08-24 14:59:50,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 293 flow [2023-08-24 14:59:50,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 276 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-24 14:59:50,856 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 149 flow [2023-08-24 14:59:50,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-08-24 14:59:50,856 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-08-24 14:59:50,857 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 149 flow [2023-08-24 14:59:50,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:50,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:50,857 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, 1, 1, 1, 1] [2023-08-24 14:59:50,877 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 14:59:51,062 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 14:59:51,063 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 14:59:51,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash 571492525, now seen corresponding path program 1 times [2023-08-24 14:59:51,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:51,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368141395] [2023-08-24 14:59:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:51,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:59:52,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:52,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368141395] [2023-08-24 14:59:52,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368141395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:52,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453435575] [2023-08-24 14:59:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:52,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:52,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:52,125 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 14:59:52,144 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 14:59:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:52,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 83 conjunts are in the unsatisfiable core [2023-08-24 14:59:52,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:59:52,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:59:52,599 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 14:59:52,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:59:52,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:59:52,745 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 14:59:52,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-08-24 14:59:52,844 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:59:52,844 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 20 [2023-08-24 14:59:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:59:52,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:59:52,971 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_344 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_344))) (+ c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset) (select (select .cse1 c_~B~0.base) c_~B~0.offset))))) (forall ((v_ArrVal_344 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_344))) (+ c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset) (select (select .cse2 c_~B~0.base) c_~B~0.offset))) .cse0)))) is different from false [2023-08-24 14:59:52,993 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) c_~B~0.offset))))) (and (forall ((v_ArrVal_344 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_344))) (+ c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset) (select (select .cse1 c_~B~0.base) c_~B~0.offset))))) (forall ((v_ArrVal_344 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_344))) (+ c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset) (select (select .cse2 c_~B~0.base) c_~B~0.offset))) .cse0)))) is different from false [2023-08-24 14:59:53,002 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) c_~B~0.offset)))) (and (forall ((v_ArrVal_344 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_344))) (+ c_~csum~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset) (select (select .cse0 c_~B~0.base) c_~B~0.offset))) .cse1)) (forall ((v_ArrVal_344 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_344))) (+ c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset) (select (select .cse2 c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-24 14:59:53,020 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_344 (Array Int Int)) (v_ArrVal_343 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_343))) (<= (let ((.cse0 (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_344))) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0)))) (forall ((v_ArrVal_344 (Array Int Int)) (v_ArrVal_343 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_343))) (<= (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0) (let ((.cse3 (store .cse2 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_344))) (+ (select (select .cse3 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse3 c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-24 14:59:53,054 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:59:53,054 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 4342 treesize of output 2968 [2023-08-24 14:59:53,085 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:59:53,086 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 342 treesize of output 318 [2023-08-24 14:59:53,100 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:59:53,100 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 310 treesize of output 302 [2023-08-24 14:59:54,316 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 14:59:54,317 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 14:59:54,318 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 14:59:54,319 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 68 treesize of output 60 [2023-08-24 14:59:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-24 14:59:54,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453435575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:59:54,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:59:54,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-08-24 14:59:54,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024455877] [2023-08-24 14:59:54,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:59:54,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 14:59:54,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:54,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 14:59:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=662, Unknown=4, NotChecked=220, Total=992 [2023-08-24 14:59:54,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 695 [2023-08-24 14:59:54,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 149 flow. Second operand has 32 states, 32 states have (on average 228.1875) internal successors, (7302), 32 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:54,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:54,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 695 [2023-08-24 14:59:54,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:55,773 INFO L124 PetriNetUnfolderBase]: 827/1205 cut-off events. [2023-08-24 14:59:55,773 INFO L125 PetriNetUnfolderBase]: For 1017/1017 co-relation queries the response was YES. [2023-08-24 14:59:55,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3844 conditions, 1205 events. 827/1205 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4343 event pairs, 31 based on Foata normal form. 1/1203 useless extension candidates. Maximal degree in co-relation 3803. Up to 784 conditions per place. [2023-08-24 14:59:55,778 INFO L140 encePairwiseOnDemand]: 680/695 looper letters, 88 selfloop transitions, 44 changer transitions 1/133 dead transitions. [2023-08-24 14:59:55,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 133 transitions, 772 flow [2023-08-24 14:59:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 14:59:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 14:59:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2614 transitions. [2023-08-24 14:59:55,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419228253760628 [2023-08-24 14:59:55,783 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2614 transitions. [2023-08-24 14:59:55,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2614 transitions. [2023-08-24 14:59:55,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:55,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2614 transitions. [2023-08-24 14:59:55,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 237.63636363636363) internal successors, (2614), 11 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:55,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:55,803 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:55,803 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 149 flow. Second operand 11 states and 2614 transitions. [2023-08-24 14:59:55,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 133 transitions, 772 flow [2023-08-24 14:59:55,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 133 transitions, 733 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-24 14:59:55,807 INFO L231 Difference]: Finished difference. Result has 53 places, 77 transitions, 486 flow [2023-08-24 14:59:55,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=486, PETRI_PLACES=53, PETRI_TRANSITIONS=77} [2023-08-24 14:59:55,808 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-24 14:59:55,808 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 77 transitions, 486 flow [2023-08-24 14:59:55,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 228.1875) internal successors, (7302), 32 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:55,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:55,810 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, 1, 1, 1, 1] [2023-08-24 14:59:55,829 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 14:59:56,015 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 14:59:56,015 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 14:59:56,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -660330391, now seen corresponding path program 2 times [2023-08-24 14:59:56,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:56,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471113104] [2023-08-24 14:59:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:56,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:59:57,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:57,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471113104] [2023-08-24 14:59:57,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471113104] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:57,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629196102] [2023-08-24 14:59:57,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:59:57,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:57,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:57,178 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 14:59:57,204 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 14:59:57,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:59:57,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:59:57,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 14:59:57,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:59:57,601 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:59:57,601 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 35 treesize of output 23 [2023-08-24 14:59:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:59:57,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:59:57,737 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:59:57,738 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 42 treesize of output 95 [2023-08-24 14:59:57,823 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 14:59:57,823 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 42 treesize of output 38 [2023-08-24 14:59:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:59:57,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629196102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:59:57,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:59:57,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 6] total 23 [2023-08-24 14:59:57,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795563023] [2023-08-24 14:59:57,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:59:57,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 14:59:57,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:59:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 14:59:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-24 14:59:57,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 695 [2023-08-24 14:59:57,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 77 transitions, 486 flow. Second operand has 25 states, 25 states have (on average 205.64) internal successors, (5141), 25 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:57,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:59:57,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 695 [2023-08-24 14:59:57,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:59:58,688 INFO L124 PetriNetUnfolderBase]: 946/1379 cut-off events. [2023-08-24 14:59:58,688 INFO L125 PetriNetUnfolderBase]: For 2886/2886 co-relation queries the response was YES. [2023-08-24 14:59:58,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6075 conditions, 1379 events. 946/1379 cut-off events. For 2886/2886 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4988 event pairs, 149 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 6029. Up to 1207 conditions per place. [2023-08-24 14:59:58,695 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 97 selfloop transitions, 34 changer transitions 1/132 dead transitions. [2023-08-24 14:59:58,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 132 transitions, 1090 flow [2023-08-24 14:59:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 14:59:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 14:59:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2524 transitions. [2023-08-24 14:59:58,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3026378896882494 [2023-08-24 14:59:58,701 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2524 transitions. [2023-08-24 14:59:58,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2524 transitions. [2023-08-24 14:59:58,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:59:58,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2524 transitions. [2023-08-24 14:59:58,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 210.33333333333334) internal successors, (2524), 12 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:58,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:58,711 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:58,711 INFO L175 Difference]: Start difference. First operand has 53 places, 77 transitions, 486 flow. Second operand 12 states and 2524 transitions. [2023-08-24 14:59:58,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 132 transitions, 1090 flow [2023-08-24 14:59:58,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 132 transitions, 1015 flow, removed 29 selfloop flow, removed 1 redundant places. [2023-08-24 14:59:58,718 INFO L231 Difference]: Finished difference. Result has 69 places, 100 transitions, 698 flow [2023-08-24 14:59:58,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=698, PETRI_PLACES=69, PETRI_TRANSITIONS=100} [2023-08-24 14:59:58,719 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 37 predicate places. [2023-08-24 14:59:58,719 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 100 transitions, 698 flow [2023-08-24 14:59:58,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 205.64) internal successors, (5141), 25 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:59:58,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:59:58,721 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, 1, 1, 1, 1] [2023-08-24 14:59:58,728 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 14:59:58,926 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 14:59:58,926 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 14:59:58,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:59:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash 10907973, now seen corresponding path program 3 times [2023-08-24 14:59:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:59:58,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512565028] [2023-08-24 14:59:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:59:58,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:59:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:59:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:59:59,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:59:59,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512565028] [2023-08-24 14:59:59,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512565028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:59:59,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175617323] [2023-08-24 14:59:59,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 14:59:59,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:59:59,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:59:59,510 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 14:59:59,512 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 14:59:59,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 14:59:59,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:59:59,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 14:59:59,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:59:59,877 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:59:59,878 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 35 treesize of output 23 [2023-08-24 14:59:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:59:59,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:00,021 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:00,021 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 38 treesize of output 87 [2023-08-24 15:00:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:00,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175617323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:00,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:00,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 17 [2023-08-24 15:00:00,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567974094] [2023-08-24 15:00:00,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:00,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:00:00,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:00,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:00:00,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:00:00,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:00:00,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 100 transitions, 698 flow. Second operand has 19 states, 19 states have (on average 240.78947368421052) internal successors, (4575), 19 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:00,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:00,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:00:00,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:00,762 INFO L124 PetriNetUnfolderBase]: 1113/1621 cut-off events. [2023-08-24 15:00:00,763 INFO L125 PetriNetUnfolderBase]: For 4300/4300 co-relation queries the response was YES. [2023-08-24 15:00:00,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7439 conditions, 1621 events. 1113/1621 cut-off events. For 4300/4300 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6055 event pairs, 196 based on Foata normal form. 1/1613 useless extension candidates. Maximal degree in co-relation 7380. Up to 1400 conditions per place. [2023-08-24 15:00:00,770 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 126 selfloop transitions, 45 changer transitions 1/172 dead transitions. [2023-08-24 15:00:00,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 172 transitions, 1497 flow [2023-08-24 15:00:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:00:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:00:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2233 transitions. [2023-08-24 15:00:00,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3569944044764189 [2023-08-24 15:00:00,775 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2233 transitions. [2023-08-24 15:00:00,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2233 transitions. [2023-08-24 15:00:00,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:00,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2233 transitions. [2023-08-24 15:00:00,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 248.11111111111111) internal successors, (2233), 9 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:00,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:00,783 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:00,783 INFO L175 Difference]: Start difference. First operand has 69 places, 100 transitions, 698 flow. Second operand 9 states and 2233 transitions. [2023-08-24 15:00:00,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 172 transitions, 1497 flow [2023-08-24 15:00:00,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 172 transitions, 1455 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-24 15:00:00,793 INFO L231 Difference]: Finished difference. Result has 81 places, 126 transitions, 1027 flow [2023-08-24 15:00:00,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1027, PETRI_PLACES=81, PETRI_TRANSITIONS=126} [2023-08-24 15:00:00,794 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 49 predicate places. [2023-08-24 15:00:00,794 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 126 transitions, 1027 flow [2023-08-24 15:00:00,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 240.78947368421052) internal successors, (4575), 19 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:00,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:00,795 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, 1, 1, 1, 1] [2023-08-24 15:00:00,802 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 15:00:01,000 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 15:00:01,000 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 15:00:01,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:01,000 INFO L85 PathProgramCache]: Analyzing trace with hash -530011037, now seen corresponding path program 4 times [2023-08-24 15:00:01,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:01,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359077703] [2023-08-24 15:00:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:01,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:01,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:01,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359077703] [2023-08-24 15:00:01,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359077703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:01,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934481005] [2023-08-24 15:00:01,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:00:01,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:01,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:01,584 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 15:00:01,587 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 15:00:01,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:00:01,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:01,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:00:01,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:01,934 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:01,934 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 35 treesize of output 23 [2023-08-24 15:00:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:01,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:02,078 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:02,079 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 38 treesize of output 87 [2023-08-24 15:00:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:02,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934481005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:02,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:02,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 17 [2023-08-24 15:00:02,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49864385] [2023-08-24 15:00:02,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:02,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:00:02,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:00:02,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:00:02,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:00:02,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 126 transitions, 1027 flow. Second operand has 19 states, 19 states have (on average 240.78947368421052) internal successors, (4575), 19 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:02,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:02,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:00:02,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:02,772 INFO L124 PetriNetUnfolderBase]: 1270/1849 cut-off events. [2023-08-24 15:00:02,772 INFO L125 PetriNetUnfolderBase]: For 6522/6522 co-relation queries the response was YES. [2023-08-24 15:00:02,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9135 conditions, 1849 events. 1270/1849 cut-off events. For 6522/6522 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7074 event pairs, 271 based on Foata normal form. 1/1849 useless extension candidates. Maximal degree in co-relation 9073. Up to 1622 conditions per place. [2023-08-24 15:00:02,785 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 137 selfloop transitions, 54 changer transitions 1/192 dead transitions. [2023-08-24 15:00:02,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 192 transitions, 1874 flow [2023-08-24 15:00:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:00:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:00:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2229 transitions. [2023-08-24 15:00:02,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563549160671463 [2023-08-24 15:00:02,789 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2229 transitions. [2023-08-24 15:00:02,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2229 transitions. [2023-08-24 15:00:02,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:02,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2229 transitions. [2023-08-24 15:00:02,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 247.66666666666666) internal successors, (2229), 9 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:02,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:02,799 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:02,799 INFO L175 Difference]: Start difference. First operand has 81 places, 126 transitions, 1027 flow. Second operand 9 states and 2229 transitions. [2023-08-24 15:00:02,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 192 transitions, 1874 flow [2023-08-24 15:00:02,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 192 transitions, 1779 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-08-24 15:00:02,822 INFO L231 Difference]: Finished difference. Result has 92 places, 151 transitions, 1378 flow [2023-08-24 15:00:02,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1378, PETRI_PLACES=92, PETRI_TRANSITIONS=151} [2023-08-24 15:00:02,822 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2023-08-24 15:00:02,822 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 151 transitions, 1378 flow [2023-08-24 15:00:02,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 240.78947368421052) internal successors, (4575), 19 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:02,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:02,824 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, 1, 1, 1, 1] [2023-08-24 15:00:02,832 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 15:00:03,029 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 15:00:03,029 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 15:00:03,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:03,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1994739219, now seen corresponding path program 5 times [2023-08-24 15:00:03,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:03,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539880800] [2023-08-24 15:00:03,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:03,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:03,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:03,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539880800] [2023-08-24 15:00:03,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539880800] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:03,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090774131] [2023-08-24 15:00:03,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:00:03,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:03,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:03,581 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 15:00:03,583 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 15:00:03,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:00:03,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:03,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:00:03,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:03,950 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:03,950 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 35 treesize of output 23 [2023-08-24 15:00:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:03,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:04,093 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:04,094 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 20 treesize of output 17 [2023-08-24 15:00:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:04,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090774131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:04,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:04,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 18 [2023-08-24 15:00:04,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328131175] [2023-08-24 15:00:04,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:04,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:00:04,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:00:04,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:00:04,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:00:04,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 151 transitions, 1378 flow. Second operand has 20 states, 20 states have (on average 240.7) internal successors, (4814), 20 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:04,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:04,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:00:04,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:04,752 INFO L124 PetriNetUnfolderBase]: 1521/2215 cut-off events. [2023-08-24 15:00:04,752 INFO L125 PetriNetUnfolderBase]: For 9853/9853 co-relation queries the response was YES. [2023-08-24 15:00:04,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11655 conditions, 2215 events. 1521/2215 cut-off events. For 9853/9853 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9002 event pairs, 140 based on Foata normal form. 1/2215 useless extension candidates. Maximal degree in co-relation 11587. Up to 1835 conditions per place. [2023-08-24 15:00:04,777 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 155 selfloop transitions, 83 changer transitions 1/239 dead transitions. [2023-08-24 15:00:04,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 239 transitions, 2488 flow [2023-08-24 15:00:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:00:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:00:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2241 transitions. [2023-08-24 15:00:04,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35827338129496406 [2023-08-24 15:00:04,787 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2241 transitions. [2023-08-24 15:00:04,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2241 transitions. [2023-08-24 15:00:04,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:04,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2241 transitions. [2023-08-24 15:00:04,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:04,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:04,801 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:04,801 INFO L175 Difference]: Start difference. First operand has 92 places, 151 transitions, 1378 flow. Second operand 9 states and 2241 transitions. [2023-08-24 15:00:04,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 239 transitions, 2488 flow [2023-08-24 15:00:04,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 239 transitions, 2372 flow, removed 38 selfloop flow, removed 1 redundant places. [2023-08-24 15:00:04,826 INFO L231 Difference]: Finished difference. Result has 104 places, 184 transitions, 1874 flow [2023-08-24 15:00:04,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1874, PETRI_PLACES=104, PETRI_TRANSITIONS=184} [2023-08-24 15:00:04,827 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 72 predicate places. [2023-08-24 15:00:04,827 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 184 transitions, 1874 flow [2023-08-24 15:00:04,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 240.7) internal successors, (4814), 20 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:04,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:04,828 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, 1, 1, 1, 1] [2023-08-24 15:00:04,848 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 15:00:05,033 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 15:00:05,034 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 15:00:05,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:05,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1191421785, now seen corresponding path program 6 times [2023-08-24 15:00:05,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:05,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553683990] [2023-08-24 15:00:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:05,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:00:06,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553683990] [2023-08-24 15:00:06,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553683990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899367864] [2023-08-24 15:00:06,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:00:06,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:06,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:06,029 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 15:00:06,032 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 15:00:06,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:00:06,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:06,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 15:00:06,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:06,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:00:06,298 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:00:06,298 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 11 treesize of output 11 [2023-08-24 15:00:06,607 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:00:06,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-08-24 15:00:06,717 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:06,717 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 83 treesize of output 99 [2023-08-24 15:00:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:06,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:11,109 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:11,109 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 52 treesize of output 40 [2023-08-24 15:00:11,125 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:11,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899367864] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:11,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:11,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 28 [2023-08-24 15:00:11,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288487682] [2023-08-24 15:00:11,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:11,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:00:11,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:00:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:00:11,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 15:00:11,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 184 transitions, 1874 flow. Second operand has 30 states, 30 states have (on average 203.3) internal successors, (6099), 30 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:11,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:11,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 15:00:11,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:12,373 INFO L124 PetriNetUnfolderBase]: 1609/2344 cut-off events. [2023-08-24 15:00:12,373 INFO L125 PetriNetUnfolderBase]: For 12955/12955 co-relation queries the response was YES. [2023-08-24 15:00:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13020 conditions, 2344 events. 1609/2344 cut-off events. For 12955/12955 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9631 event pairs, 144 based on Foata normal form. 1/2344 useless extension candidates. Maximal degree in co-relation 12946. Up to 1987 conditions per place. [2023-08-24 15:00:12,384 INFO L140 encePairwiseOnDemand]: 679/695 looper letters, 147 selfloop transitions, 90 changer transitions 1/238 dead transitions. [2023-08-24 15:00:12,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 238 transitions, 2734 flow [2023-08-24 15:00:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:00:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:00:12,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2715 transitions. [2023-08-24 15:00:12,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30049806308799115 [2023-08-24 15:00:12,389 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2715 transitions. [2023-08-24 15:00:12,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2715 transitions. [2023-08-24 15:00:12,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:12,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2715 transitions. [2023-08-24 15:00:12,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.84615384615384) internal successors, (2715), 13 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:12,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:12,400 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:12,400 INFO L175 Difference]: Start difference. First operand has 104 places, 184 transitions, 1874 flow. Second operand 13 states and 2715 transitions. [2023-08-24 15:00:12,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 238 transitions, 2734 flow [2023-08-24 15:00:12,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 238 transitions, 2580 flow, removed 61 selfloop flow, removed 2 redundant places. [2023-08-24 15:00:12,430 INFO L231 Difference]: Finished difference. Result has 118 places, 193 transitions, 2109 flow [2023-08-24 15:00:12,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2109, PETRI_PLACES=118, PETRI_TRANSITIONS=193} [2023-08-24 15:00:12,431 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 86 predicate places. [2023-08-24 15:00:12,431 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 193 transitions, 2109 flow [2023-08-24 15:00:12,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 203.3) internal successors, (6099), 30 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:12,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:12,432 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, 1, 1, 1, 1] [2023-08-24 15:00:12,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 15:00:12,637 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 15:00:12,637 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 15:00:12,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:12,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1481917211, now seen corresponding path program 7 times [2023-08-24 15:00:12,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:12,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31854759] [2023-08-24 15:00:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:12,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:13,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31854759] [2023-08-24 15:00:13,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31854759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768743737] [2023-08-24 15:00:13,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:00:13,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:13,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:13,141 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 15:00:13,143 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 15:00:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:13,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:00:13,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:13,541 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:13,541 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 35 treesize of output 23 [2023-08-24 15:00:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:13,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:13,684 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:13,685 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 20 treesize of output 17 [2023-08-24 15:00:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:13,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768743737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:13,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:13,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 18 [2023-08-24 15:00:13,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697270391] [2023-08-24 15:00:13,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:13,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:00:13,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:13,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:00:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:00:13,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:00:13,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 193 transitions, 2109 flow. Second operand has 20 states, 20 states have (on average 241.0) internal successors, (4820), 20 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:13,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:13,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:00:13,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:14,514 INFO L124 PetriNetUnfolderBase]: 1699/2477 cut-off events. [2023-08-24 15:00:14,515 INFO L125 PetriNetUnfolderBase]: For 14664/14664 co-relation queries the response was YES. [2023-08-24 15:00:14,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14254 conditions, 2477 events. 1699/2477 cut-off events. For 14664/14664 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10381 event pairs, 172 based on Foata normal form. 1/2478 useless extension candidates. Maximal degree in co-relation 14169. Up to 2116 conditions per place. [2023-08-24 15:00:14,541 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 161 selfloop transitions, 84 changer transitions 1/246 dead transitions. [2023-08-24 15:00:14,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 246 transitions, 2954 flow [2023-08-24 15:00:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:00:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:00:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2243 transitions. [2023-08-24 15:00:14,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3585931254996003 [2023-08-24 15:00:14,545 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2243 transitions. [2023-08-24 15:00:14,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2243 transitions. [2023-08-24 15:00:14,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:14,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2243 transitions. [2023-08-24 15:00:14,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 249.22222222222223) internal successors, (2243), 9 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:14,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:14,553 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:14,553 INFO L175 Difference]: Start difference. First operand has 118 places, 193 transitions, 2109 flow. Second operand 9 states and 2243 transitions. [2023-08-24 15:00:14,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 246 transitions, 2954 flow [2023-08-24 15:00:14,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 246 transitions, 2850 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-08-24 15:00:14,599 INFO L231 Difference]: Finished difference. Result has 123 places, 199 transitions, 2286 flow [2023-08-24 15:00:14,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2286, PETRI_PLACES=123, PETRI_TRANSITIONS=199} [2023-08-24 15:00:14,600 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 91 predicate places. [2023-08-24 15:00:14,600 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 199 transitions, 2286 flow [2023-08-24 15:00:14,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 241.0) internal successors, (4820), 20 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:14,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:14,601 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, 1, 1, 1, 1] [2023-08-24 15:00:14,606 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 15:00:14,805 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 15:00:14,806 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 15:00:14,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:14,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1102152841, now seen corresponding path program 8 times [2023-08-24 15:00:14,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:14,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930393927] [2023-08-24 15:00:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:14,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:15,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930393927] [2023-08-24 15:00:15,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930393927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497987023] [2023-08-24 15:00:15,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:00:15,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:15,397 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 15:00:15,399 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 15:00:15,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:00:15,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:15,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 15:00:15,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:15,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:00:15,585 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:00:15,586 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 11 treesize of output 11 [2023-08-24 15:00:15,769 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:00:15,769 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-08-24 15:00:15,923 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:15,924 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 102 treesize of output 106 [2023-08-24 15:00:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:15,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:16,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:16,657 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 52 treesize of output 40 [2023-08-24 15:00:16,671 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:16,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497987023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:16,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:16,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2023-08-24 15:00:16,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719125736] [2023-08-24 15:00:16,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:16,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 15:00:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 15:00:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-08-24 15:00:16,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 15:00:16,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 199 transitions, 2286 flow. Second operand has 22 states, 22 states have (on average 226.4090909090909) internal successors, (4981), 22 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:16,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:16,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 15:00:16,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:17,658 INFO L124 PetriNetUnfolderBase]: 1843/2686 cut-off events. [2023-08-24 15:00:17,658 INFO L125 PetriNetUnfolderBase]: For 18411/18411 co-relation queries the response was YES. [2023-08-24 15:00:17,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15854 conditions, 2686 events. 1843/2686 cut-off events. For 18411/18411 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11443 event pairs, 182 based on Foata normal form. 1/2687 useless extension candidates. Maximal degree in co-relation 15770. Up to 2240 conditions per place. [2023-08-24 15:00:17,705 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 166 selfloop transitions, 91 changer transitions 1/258 dead transitions. [2023-08-24 15:00:17,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 258 transitions, 3239 flow [2023-08-24 15:00:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:00:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:00:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2563 transitions. [2023-08-24 15:00:17,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33525179856115106 [2023-08-24 15:00:17,707 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2563 transitions. [2023-08-24 15:00:17,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2563 transitions. [2023-08-24 15:00:17,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:17,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2563 transitions. [2023-08-24 15:00:17,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 233.0) internal successors, (2563), 11 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:17,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:17,714 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:17,714 INFO L175 Difference]: Start difference. First operand has 123 places, 199 transitions, 2286 flow. Second operand 11 states and 2563 transitions. [2023-08-24 15:00:17,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 258 transitions, 3239 flow [2023-08-24 15:00:17,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 258 transitions, 3019 flow, removed 30 selfloop flow, removed 6 redundant places. [2023-08-24 15:00:17,762 INFO L231 Difference]: Finished difference. Result has 129 places, 209 transitions, 2439 flow [2023-08-24 15:00:17,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2439, PETRI_PLACES=129, PETRI_TRANSITIONS=209} [2023-08-24 15:00:17,762 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 97 predicate places. [2023-08-24 15:00:17,762 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 209 transitions, 2439 flow [2023-08-24 15:00:17,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 226.4090909090909) internal successors, (4981), 22 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:17,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:17,763 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, 1, 1, 1, 1] [2023-08-24 15:00:17,770 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 15:00:17,968 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 15:00:17,968 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 15:00:17,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -24367267, now seen corresponding path program 9 times [2023-08-24 15:00:17,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:17,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337623751] [2023-08-24 15:00:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:17,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:00:18,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:18,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337623751] [2023-08-24 15:00:18,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337623751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:18,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745430250] [2023-08-24 15:00:18,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:00:18,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:18,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:18,885 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 15:00:18,887 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 15:00:19,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:00:19,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:19,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 15:00:19,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:19,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:00:19,132 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:00:19,132 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 11 treesize of output 11 [2023-08-24 15:00:19,447 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:00:19,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-08-24 15:00:19,556 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:19,559 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 73 treesize of output 97 [2023-08-24 15:00:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:19,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:21,269 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:21,269 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 52 treesize of output 40 [2023-08-24 15:00:21,282 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:21,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745430250] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:21,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:21,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 28 [2023-08-24 15:00:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534636871] [2023-08-24 15:00:21,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:21,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:00:21,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:21,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:00:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:00:21,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 15:00:21,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 209 transitions, 2439 flow. Second operand has 30 states, 30 states have (on average 203.3) internal successors, (6099), 30 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:21,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:21,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 15:00:21,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:22,351 INFO L124 PetriNetUnfolderBase]: 1931/2815 cut-off events. [2023-08-24 15:00:22,351 INFO L125 PetriNetUnfolderBase]: For 20612/20612 co-relation queries the response was YES. [2023-08-24 15:00:22,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16806 conditions, 2815 events. 1931/2815 cut-off events. For 20612/20612 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12120 event pairs, 208 based on Foata normal form. 1/2816 useless extension candidates. Maximal degree in co-relation 16717. Up to 2453 conditions per place. [2023-08-24 15:00:22,369 INFO L140 encePairwiseOnDemand]: 679/695 looper letters, 174 selfloop transitions, 88 changer transitions 1/263 dead transitions. [2023-08-24 15:00:22,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 263 transitions, 3357 flow [2023-08-24 15:00:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:00:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:00:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2713 transitions. [2023-08-24 15:00:22,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30027670171555065 [2023-08-24 15:00:22,383 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2713 transitions. [2023-08-24 15:00:22,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2713 transitions. [2023-08-24 15:00:22,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:22,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2713 transitions. [2023-08-24 15:00:22,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.69230769230768) internal successors, (2713), 13 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:22,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:22,390 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:22,390 INFO L175 Difference]: Start difference. First operand has 129 places, 209 transitions, 2439 flow. Second operand 13 states and 2713 transitions. [2023-08-24 15:00:22,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 263 transitions, 3357 flow [2023-08-24 15:00:22,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 263 transitions, 3106 flow, removed 78 selfloop flow, removed 6 redundant places. [2023-08-24 15:00:22,463 INFO L231 Difference]: Finished difference. Result has 137 places, 215 transitions, 2510 flow [2023-08-24 15:00:22,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=2220, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2510, PETRI_PLACES=137, PETRI_TRANSITIONS=215} [2023-08-24 15:00:22,464 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 105 predicate places. [2023-08-24 15:00:22,464 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 215 transitions, 2510 flow [2023-08-24 15:00:22,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 203.3) internal successors, (6099), 30 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:22,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:22,465 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, 1, 1, 1, 1] [2023-08-24 15:00:22,482 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 15:00:22,670 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 15:00:22,671 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 15:00:22,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:22,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1998475161, now seen corresponding path program 10 times [2023-08-24 15:00:22,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:22,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023286540] [2023-08-24 15:00:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:22,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:23,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:23,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023286540] [2023-08-24 15:00:23,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023286540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:23,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198087400] [2023-08-24 15:00:23,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:00:23,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:23,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:23,322 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 15:00:23,322 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 15:00:23,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:00:23,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:23,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-24 15:00:23,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:23,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:00:23,640 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 15:00:23,755 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:23,755 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 20 [2023-08-24 15:00:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:23,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:23,984 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:23,984 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 48 treesize of output 36 [2023-08-24 15:00:23,987 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 14 treesize of output 12 [2023-08-24 15:00:23,995 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:24,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198087400] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:24,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:24,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-08-24 15:00:24,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268914467] [2023-08-24 15:00:24,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:24,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 15:00:24,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:24,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 15:00:24,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=685, Unknown=9, NotChecked=0, Total=812 [2023-08-24 15:00:24,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 695 [2023-08-24 15:00:24,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 215 transitions, 2510 flow. Second operand has 29 states, 29 states have (on average 236.3448275862069) internal successors, (6854), 29 states have internal predecessors, (6854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:24,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:24,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 695 [2023-08-24 15:00:24,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:25,032 INFO L124 PetriNetUnfolderBase]: 2142/3121 cut-off events. [2023-08-24 15:00:25,032 INFO L125 PetriNetUnfolderBase]: For 22877/22877 co-relation queries the response was YES. [2023-08-24 15:00:25,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18632 conditions, 3121 events. 2142/3121 cut-off events. For 22877/22877 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13749 event pairs, 201 based on Foata normal form. 1/3122 useless extension candidates. Maximal degree in co-relation 18537. Up to 2518 conditions per place. [2023-08-24 15:00:25,050 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 185 selfloop transitions, 113 changer transitions 1/299 dead transitions. [2023-08-24 15:00:25,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 299 transitions, 3810 flow [2023-08-24 15:00:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:00:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:00:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2439 transitions. [2023-08-24 15:00:25,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35093525179856117 [2023-08-24 15:00:25,053 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2439 transitions. [2023-08-24 15:00:25,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2439 transitions. [2023-08-24 15:00:25,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:25,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2439 transitions. [2023-08-24 15:00:25,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.9) internal successors, (2439), 10 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:25,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 695.0) internal successors, (7645), 11 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:25,059 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 695.0) internal successors, (7645), 11 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:25,059 INFO L175 Difference]: Start difference. First operand has 137 places, 215 transitions, 2510 flow. Second operand 10 states and 2439 transitions. [2023-08-24 15:00:25,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 299 transitions, 3810 flow [2023-08-24 15:00:25,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 299 transitions, 3583 flow, removed 30 selfloop flow, removed 10 redundant places. [2023-08-24 15:00:25,118 INFO L231 Difference]: Finished difference. Result has 141 places, 244 transitions, 3042 flow [2023-08-24 15:00:25,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3042, PETRI_PLACES=141, PETRI_TRANSITIONS=244} [2023-08-24 15:00:25,119 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 109 predicate places. [2023-08-24 15:00:25,119 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 244 transitions, 3042 flow [2023-08-24 15:00:25,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 236.3448275862069) internal successors, (6854), 29 states have internal predecessors, (6854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:25,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:25,120 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, 1, 1, 1, 1] [2023-08-24 15:00:25,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-24 15:00:25,325 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 15:00:25,326 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 15:00:25,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash 420186925, now seen corresponding path program 11 times [2023-08-24 15:00:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:25,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164565932] [2023-08-24 15:00:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:25,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:00:26,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:26,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164565932] [2023-08-24 15:00:26,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164565932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:26,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411864946] [2023-08-24 15:00:26,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:00:26,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:26,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:26,405 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 15:00:26,407 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 15:00:26,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:00:26,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:26,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 15:00:26,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:26,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:00:26,634 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:00:26,634 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 11 treesize of output 11 [2023-08-24 15:00:26,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:00:26,855 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 15:00:26,951 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:00:26,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-08-24 15:00:27,066 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:27,067 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 102 treesize of output 106 [2023-08-24 15:00:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:27,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:27,505 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) c_~B~0.offset))) (and (forall ((~C~0.offset Int) (v_ArrVal_1010 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1010))) (let ((.cse1 (select (select .cse0 c_~B~0.base) c_~B~0.offset)) (.cse2 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) (<= (+ (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) .cse3) c_~asum~0 c_~bsum~0) (+ .cse1 .cse2 c_~csum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_1010 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1010))) (let ((.cse4 (select (select .cse6 c_~B~0.base) c_~B~0.offset)) (.cse5 (select (select .cse6 c_~A~0.base) c_~A~0.offset))) (<= (+ .cse4 .cse5 c_~csum~0) (+ (select (select (store .cse6 c_~C~0.base (store (select .cse6 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) .cse3) c_~asum~0 c_~bsum~0))))))) is different from false [2023-08-24 15:00:27,514 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_1010 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1010))) (let ((.cse1 (select (select .cse0 c_~B~0.base) c_~B~0.offset)) (.cse2 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ .cse1 .cse2 c_~csum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_1010 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1010))) (let ((.cse3 (select (select .cse5 c_~B~0.base) c_~B~0.offset)) (.cse4 (select (select .cse5 c_~A~0.base) c_~A~0.offset))) (<= (+ .cse3 .cse4 c_~csum~0) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-24 15:00:27,542 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:27,543 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 1286 treesize of output 1134 [2023-08-24 15:00:27,561 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:27,561 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 566 treesize of output 542 [2023-08-24 15:00:29,061 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:29,061 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 57 treesize of output 45 [2023-08-24 15:00:29,079 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 14 treesize of output 8 [2023-08-24 15:00:29,086 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:29,086 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 16 treesize of output 17 [2023-08-24 15:00:29,096 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,099 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,111 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 567 treesize of output 535 [2023-08-24 15:00:29,124 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:29,125 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 550 treesize of output 372 [2023-08-24 15:00:29,202 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,206 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,211 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,214 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 8 treesize of output 6 [2023-08-24 15:00:29,244 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:29,244 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 105 treesize of output 95 [2023-08-24 15:00:29,338 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,341 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,348 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:29,348 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 16 treesize of output 17 [2023-08-24 15:00:29,359 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,364 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,367 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,372 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 14 treesize of output 8 [2023-08-24 15:00:29,380 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:29,380 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 16 treesize of output 17 [2023-08-24 15:00:29,397 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:29,397 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 54 treesize of output 46 [2023-08-24 15:00:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:00:29,426 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 15:00:29,426 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 582 treesize of output 1 [2023-08-24 15:00:29,429 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,434 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,438 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:29,456 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:29,465 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:29,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 146 treesize of output 130 [2023-08-24 15:00:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-24 15:00:29,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411864946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:29,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:29,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 33 [2023-08-24 15:00:29,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830018660] [2023-08-24 15:00:29,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:29,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 15:00:29,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:29,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 15:00:29,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=935, Unknown=2, NotChecked=126, Total=1190 [2023-08-24 15:00:29,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 695 [2023-08-24 15:00:29,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 244 transitions, 3042 flow. Second operand has 35 states, 35 states have (on average 194.9142857142857) internal successors, (6822), 35 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:29,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:29,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 695 [2023-08-24 15:00:29,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:31,068 INFO L124 PetriNetUnfolderBase]: 2230/3250 cut-off events. [2023-08-24 15:00:31,068 INFO L125 PetriNetUnfolderBase]: For 28627/28627 co-relation queries the response was YES. [2023-08-24 15:00:31,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20321 conditions, 3250 events. 2230/3250 cut-off events. For 28627/28627 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14427 event pairs, 236 based on Foata normal form. 1/3251 useless extension candidates. Maximal degree in co-relation 20226. Up to 2693 conditions per place. [2023-08-24 15:00:31,090 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 183 selfloop transitions, 113 changer transitions 1/297 dead transitions. [2023-08-24 15:00:31,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 297 transitions, 4069 flow [2023-08-24 15:00:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:00:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:00:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2609 transitions. [2023-08-24 15:00:31,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2887659103486442 [2023-08-24 15:00:31,094 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2609 transitions. [2023-08-24 15:00:31,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2609 transitions. [2023-08-24 15:00:31,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:31,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2609 transitions. [2023-08-24 15:00:31,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 200.69230769230768) internal successors, (2609), 13 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:31,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:31,101 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:31,101 INFO L175 Difference]: Start difference. First operand has 141 places, 244 transitions, 3042 flow. Second operand 13 states and 2609 transitions. [2023-08-24 15:00:31,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 297 transitions, 4069 flow [2023-08-24 15:00:31,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 297 transitions, 3839 flow, removed 98 selfloop flow, removed 3 redundant places. [2023-08-24 15:00:31,181 INFO L231 Difference]: Finished difference. Result has 154 places, 252 transitions, 3322 flow [2023-08-24 15:00:31,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3322, PETRI_PLACES=154, PETRI_TRANSITIONS=252} [2023-08-24 15:00:31,181 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 122 predicate places. [2023-08-24 15:00:31,181 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 252 transitions, 3322 flow [2023-08-24 15:00:31,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 194.9142857142857) internal successors, (6822), 35 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:31,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:31,182 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, 1, 1, 1, 1] [2023-08-24 15:00:31,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 15:00:31,388 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 15:00:31,388 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 15:00:31,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:31,388 INFO L85 PathProgramCache]: Analyzing trace with hash -172778783, now seen corresponding path program 12 times [2023-08-24 15:00:31,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:31,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525500291] [2023-08-24 15:00:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:31,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:32,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:32,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525500291] [2023-08-24 15:00:32,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525500291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:32,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466861151] [2023-08-24 15:00:32,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:00:32,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:32,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:32,102 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 15:00:32,104 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 15:00:32,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:00:32,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:32,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-24 15:00:32,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:32,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:00:32,508 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 15:00:32,615 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:32,615 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 35 treesize of output 23 [2023-08-24 15:00:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:32,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:32,767 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_1077 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1077))) (let ((.cse0 (select .cse2 ~B~0.base))) (<= (+ c_~asum~0 c_~bsum~0 (select .cse0 .cse1)) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select .cse0 c_~B~0.offset)))))) (forall ((v_ArrVal_1077 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1077))) (let ((.cse4 (select .cse3 ~B~0.base))) (<= (+ (select (select .cse3 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select .cse4 c_~B~0.offset)) (+ c_~asum~0 c_~bsum~0 (select .cse4 .cse1)))))))) is different from false [2023-08-24 15:00:32,772 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_1077 (Array Int Int))) (<= .cse0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1077) c_~A~0.base) c_~A~0.offset) c_~csum~0))) (forall ((v_ArrVal_1077 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1077) c_~A~0.base) c_~A~0.offset) c_~csum~0) .cse0)))) is different from false [2023-08-24 15:00:32,809 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:32,809 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 48 treesize of output 36 [2023-08-24 15:00:32,811 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 14 treesize of output 12 [2023-08-24 15:00:32,818 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-24 15:00:32,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466861151] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:32,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:32,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-24 15:00:32,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796888906] [2023-08-24 15:00:32,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:32,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 15:00:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 15:00:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=510, Unknown=2, NotChecked=94, Total=702 [2023-08-24 15:00:32,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 695 [2023-08-24 15:00:32,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 252 transitions, 3322 flow. Second operand has 27 states, 27 states have (on average 236.59259259259258) internal successors, (6388), 27 states have internal predecessors, (6388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:32,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:32,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 695 [2023-08-24 15:00:32,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:33,972 INFO L124 PetriNetUnfolderBase]: 2320/3383 cut-off events. [2023-08-24 15:00:33,972 INFO L125 PetriNetUnfolderBase]: For 29100/29100 co-relation queries the response was YES. [2023-08-24 15:00:33,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21579 conditions, 3383 events. 2320/3383 cut-off events. For 29100/29100 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15225 event pairs, 254 based on Foata normal form. 1/3384 useless extension candidates. Maximal degree in co-relation 21476. Up to 2818 conditions per place. [2023-08-24 15:00:33,992 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 194 selfloop transitions, 110 changer transitions 1/305 dead transitions. [2023-08-24 15:00:33,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 305 transitions, 4315 flow [2023-08-24 15:00:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:00:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:00:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2441 transitions. [2023-08-24 15:00:34,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35122302158273383 [2023-08-24 15:00:34,010 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2441 transitions. [2023-08-24 15:00:34,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2441 transitions. [2023-08-24 15:00:34,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:34,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2441 transitions. [2023-08-24 15:00:34,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 244.1) internal successors, (2441), 10 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:34,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 695.0) internal successors, (7645), 11 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:34,016 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 695.0) internal successors, (7645), 11 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:34,017 INFO L175 Difference]: Start difference. First operand has 154 places, 252 transitions, 3322 flow. Second operand 10 states and 2441 transitions. [2023-08-24 15:00:34,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 305 transitions, 4315 flow [2023-08-24 15:00:34,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 305 transitions, 4179 flow, removed 49 selfloop flow, removed 5 redundant places. [2023-08-24 15:00:34,094 INFO L231 Difference]: Finished difference. Result has 160 places, 258 transitions, 3557 flow [2023-08-24 15:00:34,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=3188, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3557, PETRI_PLACES=160, PETRI_TRANSITIONS=258} [2023-08-24 15:00:34,095 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 128 predicate places. [2023-08-24 15:00:34,095 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 258 transitions, 3557 flow [2023-08-24 15:00:34,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 236.59259259259258) internal successors, (6388), 27 states have internal predecessors, (6388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:34,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:34,096 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, 1, 1, 1, 1] [2023-08-24 15:00:34,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 15:00:34,301 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 15:00:34,301 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 15:00:34,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:34,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1560142563, now seen corresponding path program 13 times [2023-08-24 15:00:34,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:34,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261212303] [2023-08-24 15:00:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:34,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:34,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:34,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261212303] [2023-08-24 15:00:34,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261212303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:34,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898573939] [2023-08-24 15:00:34,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:00:34,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:34,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:34,961 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 15:00:34,963 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 15:00:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:35,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 15:00:35,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:35,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:00:35,184 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:00:35,184 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 11 treesize of output 11 [2023-08-24 15:00:35,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:00:35,361 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 15:00:35,481 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:00:35,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-08-24 15:00:35,640 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:35,640 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 66 treesize of output 94 [2023-08-24 15:00:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:35,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:36,556 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_1145 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1145))) (let ((.cse1 (select (select .cse0 c_~B~0.base) c_~B~0.offset)) (.cse2 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) (<= (+ (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0) (+ .cse1 c_~csum~0 .cse2))))) (forall ((~C~0.offset Int) (v_ArrVal_1145 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1145))) (let ((.cse3 (select (select .cse5 c_~B~0.base) c_~B~0.offset)) (.cse4 (select (select .cse5 c_~A~0.base) c_~A~0.offset))) (<= (+ .cse3 c_~csum~0 .cse4) (+ (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0)))))) is different from false [2023-08-24 15:00:36,591 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:36,591 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 1598 treesize of output 1414 [2023-08-24 15:00:36,611 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:36,611 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 566 treesize of output 542 [2023-08-24 15:00:38,626 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:38,626 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 109 treesize of output 79 [2023-08-24 15:00:38,631 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 65 treesize of output 59 [2023-08-24 15:00:38,663 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:00:38,670 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-08-24 15:00:38,682 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 12 treesize of output 6 [2023-08-24 15:00:38,688 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 14 treesize of output 8 [2023-08-24 15:00:38,695 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:38,695 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 16 treesize of output 17 [2023-08-24 15:00:38,708 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 36 treesize of output 24 [2023-08-24 15:00:38,716 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 201 treesize of output 189 [2023-08-24 15:00:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:00:38,721 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 116 [2023-08-24 15:00:38,737 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,740 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,745 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,748 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,753 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,756 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,760 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,787 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:38,787 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 216 treesize of output 156 [2023-08-24 15:00:38,946 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,948 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,951 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,954 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,959 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,962 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,970 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 10 treesize of output 8 [2023-08-24 15:00:38,976 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:38,980 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:39,031 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:39,031 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 100 treesize of output 90 [2023-08-24 15:00:39,122 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:39,123 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 216 treesize of output 156 [2023-08-24 15:00:39,236 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:39,241 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:39,249 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:39,249 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 70 treesize of output 66 [2023-08-24 15:00:39,277 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 38 treesize of output 34 [2023-08-24 15:00:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:39,296 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:39,298 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 146 treesize of output 130 [2023-08-24 15:00:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-24 15:00:39,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898573939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:39,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:39,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-24 15:00:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718469885] [2023-08-24 15:00:39,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:39,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 15:00:39,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 15:00:39,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=869, Unknown=1, NotChecked=60, Total=1056 [2023-08-24 15:00:39,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 695 [2023-08-24 15:00:39,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 258 transitions, 3557 flow. Second operand has 33 states, 33 states have (on average 224.1818181818182) internal successors, (7398), 33 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:39,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:39,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 695 [2023-08-24 15:00:39,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:40,538 INFO L124 PetriNetUnfolderBase]: 2464/3592 cut-off events. [2023-08-24 15:00:40,538 INFO L125 PetriNetUnfolderBase]: For 33979/33979 co-relation queries the response was YES. [2023-08-24 15:00:40,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23494 conditions, 3592 events. 2464/3592 cut-off events. For 33979/33979 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16419 event pairs, 199 based on Foata normal form. 1/3593 useless extension candidates. Maximal degree in co-relation 23390. Up to 2839 conditions per place. [2023-08-24 15:00:40,560 INFO L140 encePairwiseOnDemand]: 683/695 looper letters, 191 selfloop transitions, 125 changer transitions 1/317 dead transitions. [2023-08-24 15:00:40,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 317 transitions, 4688 flow [2023-08-24 15:00:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:00:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:00:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2763 transitions. [2023-08-24 15:00:40,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.331294964028777 [2023-08-24 15:00:40,562 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2763 transitions. [2023-08-24 15:00:40,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2763 transitions. [2023-08-24 15:00:40,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:40,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2763 transitions. [2023-08-24 15:00:40,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.25) internal successors, (2763), 12 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:40,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:40,570 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:40,570 INFO L175 Difference]: Start difference. First operand has 160 places, 258 transitions, 3557 flow. Second operand 12 states and 2763 transitions. [2023-08-24 15:00:40,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 317 transitions, 4688 flow [2023-08-24 15:00:40,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 317 transitions, 4380 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-08-24 15:00:40,648 INFO L231 Difference]: Finished difference. Result has 166 places, 268 transitions, 3768 flow [2023-08-24 15:00:40,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=3263, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3768, PETRI_PLACES=166, PETRI_TRANSITIONS=268} [2023-08-24 15:00:40,649 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 134 predicate places. [2023-08-24 15:00:40,649 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 268 transitions, 3768 flow [2023-08-24 15:00:40,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 224.1818181818182) internal successors, (7398), 33 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:40,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:40,650 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, 1, 1, 1, 1] [2023-08-24 15:00:40,656 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 15:00:40,853 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 15:00:40,853 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 15:00:40,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:40,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1608304625, now seen corresponding path program 14 times [2023-08-24 15:00:40,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:40,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087616781] [2023-08-24 15:00:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:40,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:00:41,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:41,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087616781] [2023-08-24 15:00:41,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087616781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:41,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855205211] [2023-08-24 15:00:41,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:00:41,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:41,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:41,777 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 15:00:41,778 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 15:00:41,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:00:41,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:41,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-24 15:00:41,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:41,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:00:42,008 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:00:42,009 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 11 treesize of output 11 [2023-08-24 15:00:42,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:00:42,169 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 15:00:42,302 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:00:42,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-08-24 15:00:42,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:42,391 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 66 treesize of output 94 [2023-08-24 15:00:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:42,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:46,663 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_1213 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1213))) (let ((.cse1 (select (select .cse0 c_~B~0.base) c_~B~0.offset)) (.cse2 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ .cse1 c_~csum~0 .cse2))))) (forall ((~C~0.offset Int) (v_ArrVal_1213 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1213))) (let ((.cse3 (select (select .cse5 c_~B~0.base) c_~B~0.offset)) (.cse4 (select (select .cse5 c_~A~0.base) c_~A~0.offset))) (<= (+ .cse3 c_~csum~0 .cse4) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-24 15:00:46,732 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:46,733 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 2100 treesize of output 1834 [2023-08-24 15:00:46,752 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:46,755 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 566 treesize of output 542 [2023-08-24 15:00:48,752 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:48,752 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 16 treesize of output 17 [2023-08-24 15:00:48,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:48,779 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 78 treesize of output 72 [2023-08-24 15:00:48,875 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 23 treesize of output 21 [2023-08-24 15:00:48,886 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:00:48,896 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 14 treesize of output 8 [2023-08-24 15:00:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:00:48,903 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-24 15:00:48,925 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:48,926 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 80 treesize of output 80 [2023-08-24 15:00:49,090 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:49,090 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 723 treesize of output 495 [2023-08-24 15:00:49,199 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 12 treesize of output 6 [2023-08-24 15:00:49,216 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:49,219 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:00:49,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 146 treesize of output 130 [2023-08-24 15:00:49,457 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:49,458 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 45 treesize of output 64 [2023-08-24 15:00:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-24 15:00:49,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855205211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:49,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:49,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-08-24 15:00:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492265181] [2023-08-24 15:00:49,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:49,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 15:00:49,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 15:00:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=991, Unknown=2, NotChecked=64, Total=1190 [2023-08-24 15:00:49,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 15:00:49,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 268 transitions, 3768 flow. Second operand has 35 states, 35 states have (on average 203.05714285714285) internal successors, (7107), 35 states have internal predecessors, (7107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:49,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:49,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 15:00:49,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:51,151 INFO L124 PetriNetUnfolderBase]: 2552/3721 cut-off events. [2023-08-24 15:00:51,151 INFO L125 PetriNetUnfolderBase]: For 34061/34061 co-relation queries the response was YES. [2023-08-24 15:00:51,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24476 conditions, 3721 events. 2552/3721 cut-off events. For 34061/34061 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17137 event pairs, 251 based on Foata normal form. 1/3722 useless extension candidates. Maximal degree in co-relation 24368. Up to 3154 conditions per place. [2023-08-24 15:00:51,179 INFO L140 encePairwiseOnDemand]: 680/695 looper letters, 208 selfloop transitions, 113 changer transitions 1/322 dead transitions. [2023-08-24 15:00:51,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 322 transitions, 4834 flow [2023-08-24 15:00:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:00:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:00:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2713 transitions. [2023-08-24 15:00:51,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30027670171555065 [2023-08-24 15:00:51,182 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2713 transitions. [2023-08-24 15:00:51,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2713 transitions. [2023-08-24 15:00:51,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:51,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2713 transitions. [2023-08-24 15:00:51,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.69230769230768) internal successors, (2713), 13 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:51,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:51,190 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:51,190 INFO L175 Difference]: Start difference. First operand has 166 places, 268 transitions, 3768 flow. Second operand 13 states and 2713 transitions. [2023-08-24 15:00:51,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 322 transitions, 4834 flow [2023-08-24 15:00:51,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 322 transitions, 4518 flow, removed 100 selfloop flow, removed 7 redundant places. [2023-08-24 15:00:51,319 INFO L231 Difference]: Finished difference. Result has 173 places, 274 transitions, 3863 flow [2023-08-24 15:00:51,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3863, PETRI_PLACES=173, PETRI_TRANSITIONS=274} [2023-08-24 15:00:51,324 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 141 predicate places. [2023-08-24 15:00:51,325 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 274 transitions, 3863 flow [2023-08-24 15:00:51,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 203.05714285714285) internal successors, (7107), 35 states have internal predecessors, (7107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:51,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:51,326 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, 1, 1, 1, 1] [2023-08-24 15:00:51,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-24 15:00:51,530 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 15:00:51,531 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 15:00:51,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash 306301773, now seen corresponding path program 15 times [2023-08-24 15:00:51,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:51,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259428807] [2023-08-24 15:00:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:51,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:51,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:51,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259428807] [2023-08-24 15:00:51,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259428807] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:51,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565126431] [2023-08-24 15:00:51,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:00:51,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:51,970 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 15:00:51,972 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 15:00:52,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:00:52,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:52,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:00:52,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:52,383 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:52,383 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 35 treesize of output 23 [2023-08-24 15:00:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:52,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:52,513 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:52,514 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 34 treesize of output 87 [2023-08-24 15:00:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:52,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565126431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:52,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:52,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-08-24 15:00:52,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074388902] [2023-08-24 15:00:52,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:52,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:00:52,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:52,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:00:52,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:00:52,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:00:52,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 274 transitions, 3863 flow. Second operand has 18 states, 18 states have (on average 241.05555555555554) internal successors, (4339), 18 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:52,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:52,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:00:52,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:53,604 INFO L124 PetriNetUnfolderBase]: 2801/4085 cut-off events. [2023-08-24 15:00:53,604 INFO L125 PetriNetUnfolderBase]: For 38656/38656 co-relation queries the response was YES. [2023-08-24 15:00:53,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27456 conditions, 4085 events. 2801/4085 cut-off events. For 38656/38656 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19004 event pairs, 795 based on Foata normal form. 1/4086 useless extension candidates. Maximal degree in co-relation 27342. Up to 3746 conditions per place. [2023-08-24 15:00:53,632 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 281 selfloop transitions, 67 changer transitions 1/349 dead transitions. [2023-08-24 15:00:53,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 349 transitions, 5524 flow [2023-08-24 15:00:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:00:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:00:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2241 transitions. [2023-08-24 15:00:53,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35827338129496406 [2023-08-24 15:00:53,634 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2241 transitions. [2023-08-24 15:00:53,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2241 transitions. [2023-08-24 15:00:53,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:53,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2241 transitions. [2023-08-24 15:00:53,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:53,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:53,639 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:53,639 INFO L175 Difference]: Start difference. First operand has 173 places, 274 transitions, 3863 flow. Second operand 9 states and 2241 transitions. [2023-08-24 15:00:53,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 349 transitions, 5524 flow [2023-08-24 15:00:53,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 349 transitions, 5182 flow, removed 45 selfloop flow, removed 10 redundant places. [2023-08-24 15:00:53,734 INFO L231 Difference]: Finished difference. Result has 175 places, 307 transitions, 4455 flow [2023-08-24 15:00:53,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4455, PETRI_PLACES=175, PETRI_TRANSITIONS=307} [2023-08-24 15:00:53,734 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 143 predicate places. [2023-08-24 15:00:53,735 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 307 transitions, 4455 flow [2023-08-24 15:00:53,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 241.05555555555554) internal successors, (4339), 18 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:53,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:53,735 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, 1, 1, 1, 1] [2023-08-24 15:00:53,741 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 15:00:53,940 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 15:00:53,941 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 15:00:53,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:53,941 INFO L85 PathProgramCache]: Analyzing trace with hash -838045037, now seen corresponding path program 16 times [2023-08-24 15:00:53,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:53,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480544138] [2023-08-24 15:00:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:53,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:54,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:54,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480544138] [2023-08-24 15:00:54,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480544138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:54,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599760882] [2023-08-24 15:00:54,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:00:54,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:54,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:54,432 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 15:00:54,433 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 15:00:54,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:00:54,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:54,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:00:54,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:54,818 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:54,818 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 35 treesize of output 23 [2023-08-24 15:00:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:54,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:54,956 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:54,956 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 34 treesize of output 87 [2023-08-24 15:00:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:55,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599760882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:55,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:55,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 17 [2023-08-24 15:00:55,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458696511] [2023-08-24 15:00:55,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:55,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:00:55,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:55,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:00:55,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:00:55,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:00:55,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 307 transitions, 4455 flow. Second operand has 19 states, 19 states have (on average 240.89473684210526) internal successors, (4577), 19 states have internal predecessors, (4577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:55,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:55,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:00:55,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:56,115 INFO L124 PetriNetUnfolderBase]: 2967/4330 cut-off events. [2023-08-24 15:00:56,115 INFO L125 PetriNetUnfolderBase]: For 41716/41716 co-relation queries the response was YES. [2023-08-24 15:00:56,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29061 conditions, 4330 events. 2967/4330 cut-off events. For 41716/41716 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20417 event pairs, 886 based on Foata normal form. 1/4331 useless extension candidates. Maximal degree in co-relation 28949. Up to 4023 conditions per place. [2023-08-24 15:00:56,139 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 307 selfloop transitions, 63 changer transitions 1/371 dead transitions. [2023-08-24 15:00:56,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 371 transitions, 5912 flow [2023-08-24 15:00:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:00:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:00:56,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2243 transitions. [2023-08-24 15:00:56,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3585931254996003 [2023-08-24 15:00:56,142 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2243 transitions. [2023-08-24 15:00:56,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2243 transitions. [2023-08-24 15:00:56,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:56,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2243 transitions. [2023-08-24 15:00:56,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 249.22222222222223) internal successors, (2243), 9 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:56,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:56,161 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:56,161 INFO L175 Difference]: Start difference. First operand has 175 places, 307 transitions, 4455 flow. Second operand 9 states and 2243 transitions. [2023-08-24 15:00:56,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 371 transitions, 5912 flow [2023-08-24 15:00:56,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 371 transitions, 5719 flow, removed 92 selfloop flow, removed 1 redundant places. [2023-08-24 15:00:56,270 INFO L231 Difference]: Finished difference. Result has 186 places, 327 transitions, 4912 flow [2023-08-24 15:00:56,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=4271, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4912, PETRI_PLACES=186, PETRI_TRANSITIONS=327} [2023-08-24 15:00:56,271 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 154 predicate places. [2023-08-24 15:00:56,271 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 327 transitions, 4912 flow [2023-08-24 15:00:56,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 240.89473684210526) internal successors, (4577), 19 states have internal predecessors, (4577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:56,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:56,272 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, 1, 1, 1, 1] [2023-08-24 15:00:56,279 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 15:00:56,480 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 15:00:56,480 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 15:00:56,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1202947113, now seen corresponding path program 17 times [2023-08-24 15:00:56,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:56,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160728591] [2023-08-24 15:00:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:00:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:00:57,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:00:57,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160728591] [2023-08-24 15:00:57,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160728591] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:00:57,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900389406] [2023-08-24 15:00:57,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:00:57,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:00:57,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:00:57,215 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 15:00:57,217 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 15:00:57,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:00:57,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:00:57,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:00:57,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:00:57,620 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:57,620 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 35 treesize of output 23 [2023-08-24 15:00:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:57,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:00:57,780 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:00:57,780 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 34 treesize of output 87 [2023-08-24 15:00:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:00:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900389406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:00:57,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:00:57,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 6] total 23 [2023-08-24 15:00:57,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814263754] [2023-08-24 15:00:57,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:00:57,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:00:57,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:00:57,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:00:57,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:00:57,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 695 [2023-08-24 15:00:57,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 327 transitions, 4912 flow. Second operand has 25 states, 25 states have (on average 205.56) internal successors, (5139), 25 states have internal predecessors, (5139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:57,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:00:57,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 695 [2023-08-24 15:00:57,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:00:59,144 INFO L124 PetriNetUnfolderBase]: 3161/4615 cut-off events. [2023-08-24 15:00:59,145 INFO L125 PetriNetUnfolderBase]: For 48150/48150 co-relation queries the response was YES. [2023-08-24 15:00:59,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31086 conditions, 4615 events. 3161/4615 cut-off events. For 48150/48150 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22100 event pairs, 956 based on Foata normal form. 1/4616 useless extension candidates. Maximal degree in co-relation 30969. Up to 4342 conditions per place. [2023-08-24 15:00:59,179 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 323 selfloop transitions, 60 changer transitions 1/384 dead transitions. [2023-08-24 15:00:59,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 384 transitions, 6267 flow [2023-08-24 15:00:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:00:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:00:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2538 transitions. [2023-08-24 15:00:59,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3043165467625899 [2023-08-24 15:00:59,181 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2538 transitions. [2023-08-24 15:00:59,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2538 transitions. [2023-08-24 15:00:59,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:00:59,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2538 transitions. [2023-08-24 15:00:59,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 211.5) internal successors, (2538), 12 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:59,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:59,188 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:59,188 INFO L175 Difference]: Start difference. First operand has 186 places, 327 transitions, 4912 flow. Second operand 12 states and 2538 transitions. [2023-08-24 15:00:59,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 384 transitions, 6267 flow [2023-08-24 15:00:59,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 384 transitions, 6039 flow, removed 108 selfloop flow, removed 1 redundant places. [2023-08-24 15:00:59,311 INFO L231 Difference]: Finished difference. Result has 199 places, 342 transitions, 5154 flow [2023-08-24 15:00:59,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=4684, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5154, PETRI_PLACES=199, PETRI_TRANSITIONS=342} [2023-08-24 15:00:59,311 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 167 predicate places. [2023-08-24 15:00:59,311 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 342 transitions, 5154 flow [2023-08-24 15:00:59,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 205.56) internal successors, (5139), 25 states have internal predecessors, (5139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:00:59,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:00:59,312 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, 1, 1, 1, 1] [2023-08-24 15:00:59,320 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 15:00:59,517 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 15:00:59,517 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 15:00:59,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:00:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash 988579969, now seen corresponding path program 18 times [2023-08-24 15:00:59,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:00:59,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536116413] [2023-08-24 15:00:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:00:59,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:00:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:01:00,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:00,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536116413] [2023-08-24 15:01:00,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536116413] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:00,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966864197] [2023-08-24 15:01:00,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:01:00,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:00,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:00,566 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 15:01:00,568 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 15:01:00,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:01:00,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:00,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:01:00,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:00,908 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:00,909 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 35 treesize of output 23 [2023-08-24 15:01:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:00,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:01,087 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:01,088 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 34 treesize of output 87 [2023-08-24 15:01:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:01,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966864197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:01,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:01,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 6] total 23 [2023-08-24 15:01:01,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418799141] [2023-08-24 15:01:01,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:01,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:01:01,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:01,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:01:01,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:01:01,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 695 [2023-08-24 15:01:01,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 342 transitions, 5154 flow. Second operand has 25 states, 25 states have (on average 192.4) internal successors, (4810), 25 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:01,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:01,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 695 [2023-08-24 15:01:01,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:02,748 INFO L124 PetriNetUnfolderBase]: 3368/4921 cut-off events. [2023-08-24 15:01:02,749 INFO L125 PetriNetUnfolderBase]: For 51947/51947 co-relation queries the response was YES. [2023-08-24 15:01:02,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33805 conditions, 4921 events. 3368/4921 cut-off events. For 51947/51947 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23712 event pairs, 1018 based on Foata normal form. 1/4922 useless extension candidates. Maximal degree in co-relation 33169. Up to 4629 conditions per place. [2023-08-24 15:01:02,786 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 356 selfloop transitions, 97 changer transitions 1/454 dead transitions. [2023-08-24 15:01:02,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 454 transitions, 7719 flow [2023-08-24 15:01:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 15:01:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 15:01:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2976 transitions. [2023-08-24 15:01:02,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2854676258992806 [2023-08-24 15:01:02,789 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2976 transitions. [2023-08-24 15:01:02,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2976 transitions. [2023-08-24 15:01:02,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:02,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2976 transitions. [2023-08-24 15:01:02,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 198.4) internal successors, (2976), 15 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:02,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 695.0) internal successors, (11120), 16 states have internal predecessors, (11120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:02,797 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 695.0) internal successors, (11120), 16 states have internal predecessors, (11120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:02,797 INFO L175 Difference]: Start difference. First operand has 199 places, 342 transitions, 5154 flow. Second operand 15 states and 2976 transitions. [2023-08-24 15:01:02,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 454 transitions, 7719 flow [2023-08-24 15:01:02,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 454 transitions, 7294 flow, removed 170 selfloop flow, removed 5 redundant places. [2023-08-24 15:01:02,950 INFO L231 Difference]: Finished difference. Result has 212 places, 393 transitions, 6158 flow [2023-08-24 15:01:02,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=4862, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6158, PETRI_PLACES=212, PETRI_TRANSITIONS=393} [2023-08-24 15:01:02,951 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 180 predicate places. [2023-08-24 15:01:02,951 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 393 transitions, 6158 flow [2023-08-24 15:01:02,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 192.4) internal successors, (4810), 25 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:02,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:02,952 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, 1, 1, 1, 1] [2023-08-24 15:01:02,957 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 15:01:03,157 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 15:01:03,157 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 15:01:03,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:03,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1369689263, now seen corresponding path program 19 times [2023-08-24 15:01:03,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:03,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893620071] [2023-08-24 15:01:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:03,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:03,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:03,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893620071] [2023-08-24 15:01:03,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893620071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:03,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369033822] [2023-08-24 15:01:03,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:01:03,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:03,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:03,755 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 15:01:03,757 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 15:01:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:03,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 15:01:03,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:03,955 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:01:03,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:01:03,990 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 15:01:03,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-24 15:01:04,018 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:01:04,018 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 11 treesize of output 11 [2023-08-24 15:01:04,182 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:01:04,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-08-24 15:01:04,308 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:04,308 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 102 treesize of output 106 [2023-08-24 15:01:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:04,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:07,047 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:07,048 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 74 treesize of output 118 [2023-08-24 15:01:07,261 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:07,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369033822] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:07,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:07,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-08-24 15:01:07,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800843364] [2023-08-24 15:01:07,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:07,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 15:01:07,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 15:01:07,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-08-24 15:01:07,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 15:01:07,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 393 transitions, 6158 flow. Second operand has 22 states, 22 states have (on average 226.3181818181818) internal successors, (4979), 22 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:07,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:07,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 15:01:07,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:08,871 INFO L124 PetriNetUnfolderBase]: 3448/5038 cut-off events. [2023-08-24 15:01:08,872 INFO L125 PetriNetUnfolderBase]: For 51686/51686 co-relation queries the response was YES. [2023-08-24 15:01:08,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33937 conditions, 5038 events. 3448/5038 cut-off events. For 51686/51686 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24341 event pairs, 1061 based on Foata normal form. 1/5039 useless extension candidates. Maximal degree in co-relation 33296. Up to 4760 conditions per place. [2023-08-24 15:01:08,910 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 333 selfloop transitions, 96 changer transitions 1/430 dead transitions. [2023-08-24 15:01:08,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 430 transitions, 7400 flow [2023-08-24 15:01:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:01:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:01:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2551 transitions. [2023-08-24 15:01:08,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33368214519293654 [2023-08-24 15:01:08,913 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2551 transitions. [2023-08-24 15:01:08,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2551 transitions. [2023-08-24 15:01:08,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:08,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2551 transitions. [2023-08-24 15:01:08,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 231.9090909090909) internal successors, (2551), 11 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:08,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:08,918 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:08,918 INFO L175 Difference]: Start difference. First operand has 212 places, 393 transitions, 6158 flow. Second operand 11 states and 2551 transitions. [2023-08-24 15:01:08,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 430 transitions, 7400 flow [2023-08-24 15:01:09,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 430 transitions, 7108 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-08-24 15:01:09,063 INFO L231 Difference]: Finished difference. Result has 217 places, 399 transitions, 6248 flow [2023-08-24 15:01:09,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6248, PETRI_PLACES=217, PETRI_TRANSITIONS=399} [2023-08-24 15:01:09,064 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 185 predicate places. [2023-08-24 15:01:09,064 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 399 transitions, 6248 flow [2023-08-24 15:01:09,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 226.3181818181818) internal successors, (4979), 22 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:09,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:09,064 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, 1, 1, 1, 1] [2023-08-24 15:01:09,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-24 15:01:09,272 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 15:01:09,272 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 15:01:09,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:09,273 INFO L85 PathProgramCache]: Analyzing trace with hash -336455837, now seen corresponding path program 20 times [2023-08-24 15:01:09,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:09,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712272823] [2023-08-24 15:01:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:09,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:01:10,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712272823] [2023-08-24 15:01:10,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712272823] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012323689] [2023-08-24 15:01:10,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:01:10,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:10,133 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 15:01:10,160 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 15:01:10,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:01:10,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:10,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 15:01:10,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:10,355 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:01:10,382 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:01:10,382 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 11 treesize of output 11 [2023-08-24 15:01:10,556 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:01:10,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-08-24 15:01:10,664 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:10,664 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 73 treesize of output 97 [2023-08-24 15:01:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:10,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:11,295 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:11,295 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 74 treesize of output 118 [2023-08-24 15:01:11,524 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:11,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012323689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:11,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:11,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 27 [2023-08-24 15:01:11,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949576887] [2023-08-24 15:01:11,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:11,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 15:01:11,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 15:01:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-08-24 15:01:11,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 15:01:11,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 399 transitions, 6248 flow. Second operand has 29 states, 29 states have (on average 203.41379310344828) internal successors, (5899), 29 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:11,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:11,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 15:01:11,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:13,228 INFO L124 PetriNetUnfolderBase]: 3536/5167 cut-off events. [2023-08-24 15:01:13,228 INFO L125 PetriNetUnfolderBase]: For 55168/55168 co-relation queries the response was YES. [2023-08-24 15:01:13,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34725 conditions, 5167 events. 3536/5167 cut-off events. For 55168/55168 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25057 event pairs, 1094 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 34082. Up to 4863 conditions per place. [2023-08-24 15:01:13,272 INFO L140 encePairwiseOnDemand]: 680/695 looper letters, 337 selfloop transitions, 105 changer transitions 1/443 dead transitions. [2023-08-24 15:01:13,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 443 transitions, 7547 flow [2023-08-24 15:01:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:01:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:01:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2709 transitions. [2023-08-24 15:01:13,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2998339789706696 [2023-08-24 15:01:13,276 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2709 transitions. [2023-08-24 15:01:13,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2709 transitions. [2023-08-24 15:01:13,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:13,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2709 transitions. [2023-08-24 15:01:13,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.3846153846154) internal successors, (2709), 13 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:13,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:13,282 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:13,282 INFO L175 Difference]: Start difference. First operand has 217 places, 399 transitions, 6248 flow. Second operand 13 states and 2709 transitions. [2023-08-24 15:01:13,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 443 transitions, 7547 flow [2023-08-24 15:01:13,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 443 transitions, 7283 flow, removed 75 selfloop flow, removed 7 redundant places. [2023-08-24 15:01:13,443 INFO L231 Difference]: Finished difference. Result has 225 places, 406 transitions, 6400 flow [2023-08-24 15:01:13,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=5984, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6400, PETRI_PLACES=225, PETRI_TRANSITIONS=406} [2023-08-24 15:01:13,456 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 193 predicate places. [2023-08-24 15:01:13,456 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 406 transitions, 6400 flow [2023-08-24 15:01:13,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 203.41379310344828) internal successors, (5899), 29 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:13,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:13,457 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, 1, 1, 1, 1] [2023-08-24 15:01:13,465 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 15:01:13,662 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 15:01:13,663 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 15:01:13,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:13,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1617735647, now seen corresponding path program 21 times [2023-08-24 15:01:13,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:13,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216357873] [2023-08-24 15:01:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:13,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:14,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:14,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216357873] [2023-08-24 15:01:14,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216357873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:14,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400512702] [2023-08-24 15:01:14,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:01:14,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:14,130 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 15:01:14,132 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 15:01:14,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:01:14,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:14,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:01:14,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:14,487 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:14,488 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 35 treesize of output 23 [2023-08-24 15:01:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:14,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:14,618 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:14,618 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 34 treesize of output 87 [2023-08-24 15:01:14,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:01:14,739 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:14,739 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 20 treesize of output 13 [2023-08-24 15:01:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:14,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400512702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:14,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:14,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 15:01:14,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99524293] [2023-08-24 15:01:14,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:14,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 15:01:14,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:14,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 15:01:14,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-24 15:01:14,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:01:14,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 406 transitions, 6400 flow. Second operand has 17 states, 17 states have (on average 241.35294117647058) internal successors, (4103), 17 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:14,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:14,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:01:14,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:15,966 INFO L124 PetriNetUnfolderBase]: 3626/5300 cut-off events. [2023-08-24 15:01:15,967 INFO L125 PetriNetUnfolderBase]: For 58328/58328 co-relation queries the response was YES. [2023-08-24 15:01:15,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35691 conditions, 5300 events. 3626/5300 cut-off events. For 58328/58328 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25892 event pairs, 1122 based on Foata normal form. 1/5301 useless extension candidates. Maximal degree in co-relation 35044. Up to 4992 conditions per place. [2023-08-24 15:01:16,010 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 352 selfloop transitions, 98 changer transitions 1/451 dead transitions. [2023-08-24 15:01:16,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 451 transitions, 7689 flow [2023-08-24 15:01:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:01:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:01:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2237 transitions. [2023-08-24 15:01:16,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3576338928856915 [2023-08-24 15:01:16,020 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2237 transitions. [2023-08-24 15:01:16,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2237 transitions. [2023-08-24 15:01:16,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:16,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2237 transitions. [2023-08-24 15:01:16,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 248.55555555555554) internal successors, (2237), 9 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:16,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:16,037 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:16,037 INFO L175 Difference]: Start difference. First operand has 225 places, 406 transitions, 6400 flow. Second operand 9 states and 2237 transitions. [2023-08-24 15:01:16,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 451 transitions, 7689 flow [2023-08-24 15:01:16,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 451 transitions, 7381 flow, removed 54 selfloop flow, removed 9 redundant places. [2023-08-24 15:01:16,181 INFO L231 Difference]: Finished difference. Result has 226 places, 412 transitions, 6441 flow [2023-08-24 15:01:16,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6441, PETRI_PLACES=226, PETRI_TRANSITIONS=412} [2023-08-24 15:01:16,181 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 194 predicate places. [2023-08-24 15:01:16,181 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 412 transitions, 6441 flow [2023-08-24 15:01:16,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 241.35294117647058) internal successors, (4103), 17 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:16,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:16,182 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, 1, 1, 1, 1] [2023-08-24 15:01:16,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-24 15:01:16,387 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 15:01:16,387 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 15:01:16,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:16,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1021178593, now seen corresponding path program 22 times [2023-08-24 15:01:16,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:16,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473268619] [2023-08-24 15:01:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:16,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:16,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:16,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473268619] [2023-08-24 15:01:16,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473268619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:16,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531092733] [2023-08-24 15:01:16,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:01:16,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:16,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:16,830 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:01:16,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 15:01:16,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:01:16,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:16,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:01:16,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:17,217 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:17,217 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 35 treesize of output 23 [2023-08-24 15:01:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:17,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:17,339 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:17,339 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 42 treesize of output 95 [2023-08-24 15:01:17,416 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 15:01:17,416 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 42 treesize of output 38 [2023-08-24 15:01:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:17,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531092733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:17,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:17,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 15:01:17,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967037328] [2023-08-24 15:01:17,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:17,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 15:01:17,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:17,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 15:01:17,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-24 15:01:17,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:01:17,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 412 transitions, 6441 flow. Second operand has 17 states, 17 states have (on average 241.2941176470588) internal successors, (4102), 17 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:17,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:17,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:01:17,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:18,597 INFO L124 PetriNetUnfolderBase]: 3726/5447 cut-off events. [2023-08-24 15:01:18,597 INFO L125 PetriNetUnfolderBase]: For 61681/61681 co-relation queries the response was YES. [2023-08-24 15:01:18,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36541 conditions, 5447 events. 3726/5447 cut-off events. For 61681/61681 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 26702 event pairs, 1176 based on Foata normal form. 1/5448 useless extension candidates. Maximal degree in co-relation 35892. Up to 5187 conditions per place. [2023-08-24 15:01:18,647 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 362 selfloop transitions, 90 changer transitions 1/453 dead transitions. [2023-08-24 15:01:18,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 453 transitions, 7719 flow [2023-08-24 15:01:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:01:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:01:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2227 transitions. [2023-08-24 15:01:18,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35603517186251 [2023-08-24 15:01:18,650 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2227 transitions. [2023-08-24 15:01:18,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2227 transitions. [2023-08-24 15:01:18,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:18,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2227 transitions. [2023-08-24 15:01:18,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 247.44444444444446) internal successors, (2227), 9 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:18,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:18,654 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:18,654 INFO L175 Difference]: Start difference. First operand has 226 places, 412 transitions, 6441 flow. Second operand 9 states and 2227 transitions. [2023-08-24 15:01:18,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 453 transitions, 7719 flow [2023-08-24 15:01:18,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 453 transitions, 7427 flow, removed 50 selfloop flow, removed 6 redundant places. [2023-08-24 15:01:18,893 INFO L231 Difference]: Finished difference. Result has 232 places, 423 transitions, 6583 flow [2023-08-24 15:01:18,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6153, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6583, PETRI_PLACES=232, PETRI_TRANSITIONS=423} [2023-08-24 15:01:18,894 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 200 predicate places. [2023-08-24 15:01:18,894 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 423 transitions, 6583 flow [2023-08-24 15:01:18,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 241.2941176470588) internal successors, (4102), 17 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:18,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:18,895 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, 1, 1, 1, 1] [2023-08-24 15:01:18,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-24 15:01:19,100 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 15:01:19,100 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 15:01:19,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash -355464987, now seen corresponding path program 23 times [2023-08-24 15:01:19,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:19,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575169485] [2023-08-24 15:01:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:19,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:19,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:19,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575169485] [2023-08-24 15:01:19,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575169485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:19,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089429071] [2023-08-24 15:01:19,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:01:19,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:19,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:19,564 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 15:01:19,565 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 15:01:19,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:01:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:19,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:01:19,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:19,994 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:19,994 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 35 treesize of output 23 [2023-08-24 15:01:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:20,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:20,147 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:20,147 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 42 treesize of output 95 [2023-08-24 15:01:20,265 INFO L322 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-08-24 15:01:20,265 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 42 treesize of output 30 [2023-08-24 15:01:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:20,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089429071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:20,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:20,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 15:01:20,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062102671] [2023-08-24 15:01:20,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:20,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 15:01:20,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:20,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 15:01:20,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-24 15:01:20,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:01:20,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 423 transitions, 6583 flow. Second operand has 17 states, 17 states have (on average 241.2941176470588) internal successors, (4102), 17 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:20,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:20,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:01:20,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:21,649 INFO L124 PetriNetUnfolderBase]: 3826/5594 cut-off events. [2023-08-24 15:01:21,649 INFO L125 PetriNetUnfolderBase]: For 66176/66176 co-relation queries the response was YES. [2023-08-24 15:01:21,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37508 conditions, 5594 events. 3826/5594 cut-off events. For 66176/66176 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 27579 event pairs, 1225 based on Foata normal form. 1/5595 useless extension candidates. Maximal degree in co-relation 36855. Up to 5334 conditions per place. [2023-08-24 15:01:21,696 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 373 selfloop transitions, 91 changer transitions 1/465 dead transitions. [2023-08-24 15:01:21,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 465 transitions, 7918 flow [2023-08-24 15:01:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:01:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:01:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2229 transitions. [2023-08-24 15:01:21,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563549160671463 [2023-08-24 15:01:21,698 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2229 transitions. [2023-08-24 15:01:21,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2229 transitions. [2023-08-24 15:01:21,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:21,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2229 transitions. [2023-08-24 15:01:21,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 247.66666666666666) internal successors, (2229), 9 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:21,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:21,702 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:21,702 INFO L175 Difference]: Start difference. First operand has 232 places, 423 transitions, 6583 flow. Second operand 9 states and 2229 transitions. [2023-08-24 15:01:21,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 465 transitions, 7918 flow [2023-08-24 15:01:21,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 465 transitions, 7641 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-08-24 15:01:21,891 INFO L231 Difference]: Finished difference. Result has 240 places, 433 transitions, 6751 flow [2023-08-24 15:01:21,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6308, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6751, PETRI_PLACES=240, PETRI_TRANSITIONS=433} [2023-08-24 15:01:21,892 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 208 predicate places. [2023-08-24 15:01:21,892 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 433 transitions, 6751 flow [2023-08-24 15:01:21,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 241.2941176470588) internal successors, (4102), 17 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:21,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:21,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:01:21,900 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 15:01:22,098 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 15:01:22,098 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 15:01:22,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash -61178583, now seen corresponding path program 24 times [2023-08-24 15:01:22,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:22,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50074835] [2023-08-24 15:01:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:22,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:01:23,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:23,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50074835] [2023-08-24 15:01:23,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50074835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:23,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713165230] [2023-08-24 15:01:23,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:01:23,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:23,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:23,012 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 15:01:23,014 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 15:01:23,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:01:23,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:23,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 15:01:23,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:23,223 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:01:23,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:01:23,271 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 15:01:23,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-24 15:01:23,328 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 15:01:23,328 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 15:01:23,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-08-24 15:01:23,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-08-24 15:01:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:23,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:23,913 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:23,914 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 195 treesize of output 215 [2023-08-24 15:01:24,791 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:24,792 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:24,833 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 15:01:24,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-08-24 15:01:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:25,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713165230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:25,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:25,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 32 [2023-08-24 15:01:25,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91135576] [2023-08-24 15:01:25,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:25,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 15:01:25,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:25,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 15:01:25,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 15:01:25,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 695 [2023-08-24 15:01:25,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 433 transitions, 6751 flow. Second operand has 34 states, 34 states have (on average 204.0) internal successors, (6936), 34 states have internal predecessors, (6936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:25,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:25,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 695 [2023-08-24 15:01:25,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:27,021 INFO L124 PetriNetUnfolderBase]: 3924/5737 cut-off events. [2023-08-24 15:01:27,021 INFO L125 PetriNetUnfolderBase]: For 72293/72293 co-relation queries the response was YES. [2023-08-24 15:01:27,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38653 conditions, 5737 events. 3924/5737 cut-off events. For 72293/72293 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28459 event pairs, 1259 based on Foata normal form. 1/5738 useless extension candidates. Maximal degree in co-relation 37996. Up to 5481 conditions per place. [2023-08-24 15:01:27,065 INFO L140 encePairwiseOnDemand]: 683/695 looper letters, 375 selfloop transitions, 96 changer transitions 1/472 dead transitions. [2023-08-24 15:01:27,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 472 transitions, 8170 flow [2023-08-24 15:01:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:01:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:01:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2712 transitions. [2023-08-24 15:01:27,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3001660210293304 [2023-08-24 15:01:27,068 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2712 transitions. [2023-08-24 15:01:27,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2712 transitions. [2023-08-24 15:01:27,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:27,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2712 transitions. [2023-08-24 15:01:27,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.6153846153846) internal successors, (2712), 13 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:27,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:27,073 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:27,074 INFO L175 Difference]: Start difference. First operand has 240 places, 433 transitions, 6751 flow. Second operand 13 states and 2712 transitions. [2023-08-24 15:01:27,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 472 transitions, 8170 flow [2023-08-24 15:01:27,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 472 transitions, 7899 flow, removed 65 selfloop flow, removed 3 redundant places. [2023-08-24 15:01:27,294 INFO L231 Difference]: Finished difference. Result has 251 places, 442 transitions, 6979 flow [2023-08-24 15:01:27,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6480, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6979, PETRI_PLACES=251, PETRI_TRANSITIONS=442} [2023-08-24 15:01:27,294 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 219 predicate places. [2023-08-24 15:01:27,294 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 442 transitions, 6979 flow [2023-08-24 15:01:27,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 204.0) internal successors, (6936), 34 states have internal predecessors, (6936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:27,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:27,295 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, 1, 1, 1, 1] [2023-08-24 15:01:27,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-24 15:01:27,501 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 15:01:27,501 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 15:01:27,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:27,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1804623529, now seen corresponding path program 25 times [2023-08-24 15:01:27,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:27,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999402612] [2023-08-24 15:01:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:27,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:01:28,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:28,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999402612] [2023-08-24 15:01:28,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999402612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:28,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429320786] [2023-08-24 15:01:28,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:01:28,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:28,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:28,654 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 15:01:28,656 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 15:01:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:28,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 15:01:28,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:28,868 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:01:28,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:01:28,911 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 15:01:28,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2023-08-24 15:01:28,963 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 15:01:28,963 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 16 treesize of output 18 [2023-08-24 15:01:29,111 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 15:01:29,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-08-24 15:01:29,210 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:29,210 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 1 case distinctions, treesize of input 39 treesize of output 23 [2023-08-24 15:01:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:29,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:29,350 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:29,351 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 195 treesize of output 215 [2023-08-24 15:01:30,486 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:30,487 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:30,540 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 15:01:30,541 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 42 treesize of output 65 [2023-08-24 15:01:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:31,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429320786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:31,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:31,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2023-08-24 15:01:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328801411] [2023-08-24 15:01:31,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:31,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:01:31,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:31,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:01:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:01:31,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 15:01:31,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 442 transitions, 6979 flow. Second operand has 30 states, 30 states have (on average 203.1) internal successors, (6093), 30 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:31,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:31,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 15:01:31,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:32,971 INFO L124 PetriNetUnfolderBase]: 4004/5854 cut-off events. [2023-08-24 15:01:32,972 INFO L125 PetriNetUnfolderBase]: For 78340/78340 co-relation queries the response was YES. [2023-08-24 15:01:33,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39531 conditions, 5854 events. 4004/5854 cut-off events. For 78340/78340 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29173 event pairs, 1295 based on Foata normal form. 1/5855 useless extension candidates. Maximal degree in co-relation 38872. Up to 5608 conditions per place. [2023-08-24 15:01:33,028 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 377 selfloop transitions, 98 changer transitions 1/476 dead transitions. [2023-08-24 15:01:33,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 476 transitions, 8343 flow [2023-08-24 15:01:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 15:01:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 15:01:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3101 transitions. [2023-08-24 15:01:33,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974580335731415 [2023-08-24 15:01:33,031 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3101 transitions. [2023-08-24 15:01:33,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3101 transitions. [2023-08-24 15:01:33,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:33,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3101 transitions. [2023-08-24 15:01:33,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 206.73333333333332) internal successors, (3101), 15 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:33,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 695.0) internal successors, (11120), 16 states have internal predecessors, (11120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:33,038 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 695.0) internal successors, (11120), 16 states have internal predecessors, (11120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:33,038 INFO L175 Difference]: Start difference. First operand has 251 places, 442 transitions, 6979 flow. Second operand 15 states and 3101 transitions. [2023-08-24 15:01:33,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 476 transitions, 8343 flow [2023-08-24 15:01:33,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 476 transitions, 8001 flow, removed 128 selfloop flow, removed 7 redundant places. [2023-08-24 15:01:33,308 INFO L231 Difference]: Finished difference. Result has 260 places, 448 transitions, 7087 flow [2023-08-24 15:01:33,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6637, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7087, PETRI_PLACES=260, PETRI_TRANSITIONS=448} [2023-08-24 15:01:33,308 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 228 predicate places. [2023-08-24 15:01:33,308 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 448 transitions, 7087 flow [2023-08-24 15:01:33,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 203.1) internal successors, (6093), 30 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:33,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:33,309 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, 1, 1, 1, 1] [2023-08-24 15:01:33,314 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 15:01:33,514 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 15:01:33,514 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 15:01:33,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:33,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1985228243, now seen corresponding path program 26 times [2023-08-24 15:01:33,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:33,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544575407] [2023-08-24 15:01:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:33,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:01:34,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:34,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544575407] [2023-08-24 15:01:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544575407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:34,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350728562] [2023-08-24 15:01:34,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:01:34,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:34,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:34,325 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 15:01:34,327 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 15:01:34,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:01:34,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:34,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 15:01:34,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:34,557 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:01:34,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:01:34,607 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 15:01:34,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-24 15:01:34,654 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:01:34,655 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 11 treesize of output 11 [2023-08-24 15:01:34,856 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:01:34,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-08-24 15:01:34,961 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:34,961 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 102 treesize of output 106 [2023-08-24 15:01:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:35,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:36,824 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:36,825 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 90 treesize of output 134 [2023-08-24 15:01:36,934 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:36,952 INFO L322 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-08-24 15:01:36,952 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 42 treesize of output 30 [2023-08-24 15:01:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:37,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350728562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:37,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:37,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2023-08-24 15:01:37,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836677502] [2023-08-24 15:01:37,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:37,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 15:01:37,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 15:01:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-08-24 15:01:37,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 695 [2023-08-24 15:01:37,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 448 transitions, 7087 flow. Second operand has 29 states, 29 states have (on average 204.10344827586206) internal successors, (5919), 29 states have internal predecessors, (5919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:37,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:37,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 695 [2023-08-24 15:01:37,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:38,938 INFO L124 PetriNetUnfolderBase]: 4084/5971 cut-off events. [2023-08-24 15:01:38,938 INFO L125 PetriNetUnfolderBase]: For 82683/82683 co-relation queries the response was YES. [2023-08-24 15:01:38,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40347 conditions, 5971 events. 4084/5971 cut-off events. For 82683/82683 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 29925 event pairs, 1329 based on Foata normal form. 1/5972 useless extension candidates. Maximal degree in co-relation 39685. Up to 5725 conditions per place. [2023-08-24 15:01:38,988 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 386 selfloop transitions, 95 changer transitions 1/482 dead transitions. [2023-08-24 15:01:38,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 482 transitions, 8477 flow [2023-08-24 15:01:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:01:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:01:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2508 transitions. [2023-08-24 15:01:39,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30071942446043165 [2023-08-24 15:01:39,014 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2508 transitions. [2023-08-24 15:01:39,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2508 transitions. [2023-08-24 15:01:39,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:39,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2508 transitions. [2023-08-24 15:01:39,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 209.0) internal successors, (2508), 12 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:39,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:39,020 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:39,020 INFO L175 Difference]: Start difference. First operand has 260 places, 448 transitions, 7087 flow. Second operand 12 states and 2508 transitions. [2023-08-24 15:01:39,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 482 transitions, 8477 flow [2023-08-24 15:01:39,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 482 transitions, 8140 flow, removed 108 selfloop flow, removed 11 redundant places. [2023-08-24 15:01:39,343 INFO L231 Difference]: Finished difference. Result has 262 places, 454 transitions, 7206 flow [2023-08-24 15:01:39,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6750, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7206, PETRI_PLACES=262, PETRI_TRANSITIONS=454} [2023-08-24 15:01:39,344 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 230 predicate places. [2023-08-24 15:01:39,344 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 454 transitions, 7206 flow [2023-08-24 15:01:39,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 204.10344827586206) internal successors, (5919), 29 states have internal predecessors, (5919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:39,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:39,345 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, 1, 1, 1, 1] [2023-08-24 15:01:39,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-24 15:01:39,550 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 15:01:39,551 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 15:01:39,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1078402715, now seen corresponding path program 27 times [2023-08-24 15:01:39,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:39,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150884542] [2023-08-24 15:01:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:39,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:40,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:40,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150884542] [2023-08-24 15:01:40,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150884542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:40,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775434132] [2023-08-24 15:01:40,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:01:40,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:40,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:40,089 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 15:01:40,091 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 15:01:40,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:01:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:40,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 15:01:40,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:40,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:01:40,379 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:01:40,379 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 11 treesize of output 11 [2023-08-24 15:01:40,601 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:01:40,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-08-24 15:01:40,688 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:40,688 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 73 treesize of output 97 [2023-08-24 15:01:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:40,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:40,865 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:40,866 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 90 treesize of output 134 [2023-08-24 15:01:41,108 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:41,130 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 15:01:41,130 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 42 treesize of output 38 [2023-08-24 15:01:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:41,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775434132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:41,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:41,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-24 15:01:41,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751573216] [2023-08-24 15:01:41,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:41,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 15:01:41,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 15:01:41,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-08-24 15:01:41,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 15:01:41,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 454 transitions, 7206 flow. Second operand has 23 states, 23 states have (on average 211.47826086956522) internal successors, (4864), 23 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:41,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:41,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 15:01:41,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:42,973 INFO L124 PetriNetUnfolderBase]: 4186/6120 cut-off events. [2023-08-24 15:01:42,973 INFO L125 PetriNetUnfolderBase]: For 88151/88151 co-relation queries the response was YES. [2023-08-24 15:01:43,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41613 conditions, 6120 events. 4186/6120 cut-off events. For 88151/88151 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30813 event pairs, 1370 based on Foata normal form. 1/6121 useless extension candidates. Maximal degree in co-relation 40948. Up to 5860 conditions per place. [2023-08-24 15:01:43,018 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 399 selfloop transitions, 95 changer transitions 1/495 dead transitions. [2023-08-24 15:01:43,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 495 transitions, 8736 flow [2023-08-24 15:01:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:01:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:01:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2386 transitions. [2023-08-24 15:01:43,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3120994113799869 [2023-08-24 15:01:43,021 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2386 transitions. [2023-08-24 15:01:43,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2386 transitions. [2023-08-24 15:01:43,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:43,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2386 transitions. [2023-08-24 15:01:43,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.9090909090909) internal successors, (2386), 11 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:43,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:43,025 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:43,025 INFO L175 Difference]: Start difference. First operand has 262 places, 454 transitions, 7206 flow. Second operand 11 states and 2386 transitions. [2023-08-24 15:01:43,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 495 transitions, 8736 flow [2023-08-24 15:01:43,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 495 transitions, 8400 flow, removed 113 selfloop flow, removed 8 redundant places. [2023-08-24 15:01:43,207 INFO L231 Difference]: Finished difference. Result has 267 places, 463 transitions, 7425 flow [2023-08-24 15:01:43,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6870, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7425, PETRI_PLACES=267, PETRI_TRANSITIONS=463} [2023-08-24 15:01:43,208 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 235 predicate places. [2023-08-24 15:01:43,208 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 463 transitions, 7425 flow [2023-08-24 15:01:43,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.47826086956522) internal successors, (4864), 23 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:43,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:43,209 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, 1, 1, 1, 1] [2023-08-24 15:01:43,215 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 15:01:43,414 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 15:01:43,415 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 15:01:43,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash -552024449, now seen corresponding path program 28 times [2023-08-24 15:01:43,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:43,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260945365] [2023-08-24 15:01:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:43,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:43,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:43,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260945365] [2023-08-24 15:01:43,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260945365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:43,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472146739] [2023-08-24 15:01:43,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:01:43,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:43,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:43,854 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 15:01:43,855 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 15:01:44,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:01:44,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:44,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:01:44,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:44,308 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:44,309 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 35 treesize of output 23 [2023-08-24 15:01:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:44,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:44,398 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:44,398 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 42 treesize of output 95 [2023-08-24 15:01:44,607 INFO L322 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-08-24 15:01:44,607 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 42 treesize of output 30 [2023-08-24 15:01:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:44,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472146739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:44,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-08-24 15:01:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64352371] [2023-08-24 15:01:44,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:44,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:01:44,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:01:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:01:44,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:01:44,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 463 transitions, 7425 flow. Second operand has 18 states, 18 states have (on average 241.22222222222223) internal successors, (4342), 18 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:44,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:44,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:01:44,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:46,055 INFO L124 PetriNetUnfolderBase]: 4276/6253 cut-off events. [2023-08-24 15:01:46,055 INFO L125 PetriNetUnfolderBase]: For 91602/91602 co-relation queries the response was YES. [2023-08-24 15:01:46,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42457 conditions, 6253 events. 4276/6253 cut-off events. For 91602/91602 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31604 event pairs, 1413 based on Foata normal form. 1/6254 useless extension candidates. Maximal degree in co-relation 41788. Up to 5989 conditions per place. [2023-08-24 15:01:46,118 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 411 selfloop transitions, 91 changer transitions 1/503 dead transitions. [2023-08-24 15:01:46,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 503 transitions, 8821 flow [2023-08-24 15:01:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:01:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:01:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2231 transitions. [2023-08-24 15:01:46,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3566746602717826 [2023-08-24 15:01:46,120 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2231 transitions. [2023-08-24 15:01:46,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2231 transitions. [2023-08-24 15:01:46,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:46,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2231 transitions. [2023-08-24 15:01:46,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 247.88888888888889) internal successors, (2231), 9 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:46,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:46,124 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:46,124 INFO L175 Difference]: Start difference. First operand has 267 places, 463 transitions, 7425 flow. Second operand 9 states and 2231 transitions. [2023-08-24 15:01:46,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 503 transitions, 8821 flow [2023-08-24 15:01:46,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 503 transitions, 8480 flow, removed 118 selfloop flow, removed 6 redundant places. [2023-08-24 15:01:46,423 INFO L231 Difference]: Finished difference. Result has 271 places, 469 transitions, 7467 flow [2023-08-24 15:01:46,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=7084, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7467, PETRI_PLACES=271, PETRI_TRANSITIONS=469} [2023-08-24 15:01:46,424 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 239 predicate places. [2023-08-24 15:01:46,424 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 469 transitions, 7467 flow [2023-08-24 15:01:46,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 241.22222222222223) internal successors, (4342), 18 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:46,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:46,424 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, 1, 1, 1, 1] [2023-08-24 15:01:46,432 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 15:01:46,629 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 15:01:46,630 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 15:01:46,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:46,630 INFO L85 PathProgramCache]: Analyzing trace with hash 315669393, now seen corresponding path program 29 times [2023-08-24 15:01:46,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:46,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835992545] [2023-08-24 15:01:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:46,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:01:47,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:47,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835992545] [2023-08-24 15:01:47,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835992545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:47,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476486215] [2023-08-24 15:01:47,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:01:47,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:47,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:47,369 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 15:01:47,371 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 15:01:47,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:01:47,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:47,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 15:01:47,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:47,602 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:01:47,602 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:01:47,642 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 15:01:47,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2023-08-24 15:01:47,696 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 15:01:47,696 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 16 treesize of output 18 [2023-08-24 15:01:47,874 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 15:01:47,874 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-08-24 15:01:48,047 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:48,047 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 1 case distinctions, treesize of input 46 treesize of output 26 [2023-08-24 15:01:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:48,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:48,203 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:48,203 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 179 treesize of output 199 [2023-08-24 15:01:48,934 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:48,935 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:48,983 INFO L322 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-24 15:01:48,984 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 38 treesize of output 61 [2023-08-24 15:01:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:49,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476486215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:49,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:49,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2023-08-24 15:01:49,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701643548] [2023-08-24 15:01:49,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:49,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 15:01:49,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:49,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 15:01:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-08-24 15:01:49,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 695 [2023-08-24 15:01:49,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 469 transitions, 7467 flow. Second operand has 26 states, 26 states have (on average 199.15384615384616) internal successors, (5178), 26 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:49,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:49,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 695 [2023-08-24 15:01:49,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:51,332 INFO L124 PetriNetUnfolderBase]: 4606/6734 cut-off events. [2023-08-24 15:01:51,332 INFO L125 PetriNetUnfolderBase]: For 104102/104102 co-relation queries the response was YES. [2023-08-24 15:01:51,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48679 conditions, 6734 events. 4606/6734 cut-off events. For 104102/104102 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34153 event pairs, 1455 based on Foata normal form. 1/6735 useless extension candidates. Maximal degree in co-relation 48007. Up to 6284 conditions per place. [2023-08-24 15:01:51,403 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 427 selfloop transitions, 185 changer transitions 1/613 dead transitions. [2023-08-24 15:01:51,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 613 transitions, 11929 flow [2023-08-24 15:01:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:01:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 15:01:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3860 transitions. [2023-08-24 15:01:51,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29231351760696705 [2023-08-24 15:01:51,407 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3860 transitions. [2023-08-24 15:01:51,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3860 transitions. [2023-08-24 15:01:51,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:51,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3860 transitions. [2023-08-24 15:01:51,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 203.1578947368421) internal successors, (3860), 19 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:51,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 695.0) internal successors, (13900), 20 states have internal predecessors, (13900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:51,416 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 695.0) internal successors, (13900), 20 states have internal predecessors, (13900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:51,416 INFO L175 Difference]: Start difference. First operand has 271 places, 469 transitions, 7467 flow. Second operand 19 states and 3860 transitions. [2023-08-24 15:01:51,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 613 transitions, 11929 flow [2023-08-24 15:01:51,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 613 transitions, 11445 flow, removed 74 selfloop flow, removed 6 redundant places. [2023-08-24 15:01:51,727 INFO L231 Difference]: Finished difference. Result has 287 places, 565 transitions, 10269 flow [2023-08-24 15:01:51,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=7145, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10269, PETRI_PLACES=287, PETRI_TRANSITIONS=565} [2023-08-24 15:01:51,728 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 255 predicate places. [2023-08-24 15:01:51,728 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 565 transitions, 10269 flow [2023-08-24 15:01:51,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 199.15384615384616) internal successors, (5178), 26 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:51,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:51,728 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, 1, 1, 1, 1] [2023-08-24 15:01:51,736 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 15:01:51,934 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 15:01:51,934 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 15:01:51,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:51,934 INFO L85 PathProgramCache]: Analyzing trace with hash -28600303, now seen corresponding path program 30 times [2023-08-24 15:01:51,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:51,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845492079] [2023-08-24 15:01:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:51,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:52,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845492079] [2023-08-24 15:01:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845492079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861345728] [2023-08-24 15:01:52,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:01:52,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:52,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:52,479 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 15:01:52,481 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 15:01:52,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:01:52,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:01:52,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 15:01:52,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:52,689 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:01:52,719 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:01:52,720 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 11 treesize of output 11 [2023-08-24 15:01:52,879 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:01:52,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-08-24 15:01:53,031 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:53,031 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 102 treesize of output 106 [2023-08-24 15:01:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:53,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:53,331 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:53,332 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 78 treesize of output 118 [2023-08-24 15:01:53,436 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861345728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:53,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:53,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2023-08-24 15:01:53,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105788738] [2023-08-24 15:01:53,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:53,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 15:01:53,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:53,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 15:01:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-08-24 15:01:53,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 15:01:53,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 565 transitions, 10269 flow. Second operand has 22 states, 22 states have (on average 226.3181818181818) internal successors, (4979), 22 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:53,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:53,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 15:01:53,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:01:55,231 INFO L124 PetriNetUnfolderBase]: 4750/6943 cut-off events. [2023-08-24 15:01:55,231 INFO L125 PetriNetUnfolderBase]: For 118520/118520 co-relation queries the response was YES. [2023-08-24 15:01:55,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50724 conditions, 6943 events. 4750/6943 cut-off events. For 118520/118520 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35601 event pairs, 1461 based on Foata normal form. 1/6944 useless extension candidates. Maximal degree in co-relation 50048. Up to 6376 conditions per place. [2023-08-24 15:01:55,293 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 417 selfloop transitions, 195 changer transitions 1/613 dead transitions. [2023-08-24 15:01:55,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 613 transitions, 12150 flow [2023-08-24 15:01:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:01:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:01:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2555 transitions. [2023-08-24 15:01:55,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342053629823414 [2023-08-24 15:01:55,295 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2555 transitions. [2023-08-24 15:01:55,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2555 transitions. [2023-08-24 15:01:55,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:01:55,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2555 transitions. [2023-08-24 15:01:55,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 232.27272727272728) internal successors, (2555), 11 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:55,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:55,300 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:55,300 INFO L175 Difference]: Start difference. First operand has 287 places, 565 transitions, 10269 flow. Second operand 11 states and 2555 transitions. [2023-08-24 15:01:55,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 613 transitions, 12150 flow [2023-08-24 15:01:55,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 613 transitions, 11587 flow, removed 206 selfloop flow, removed 7 redundant places. [2023-08-24 15:01:55,676 INFO L231 Difference]: Finished difference. Result has 292 places, 575 transitions, 10555 flow [2023-08-24 15:01:55,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=9706, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10555, PETRI_PLACES=292, PETRI_TRANSITIONS=575} [2023-08-24 15:01:55,678 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 260 predicate places. [2023-08-24 15:01:55,678 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 575 transitions, 10555 flow [2023-08-24 15:01:55,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 226.3181818181818) internal successors, (4979), 22 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:55,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:01:55,678 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, 1, 1, 1, 1] [2023-08-24 15:01:55,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-24 15:01:55,883 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 15:01:55,884 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 15:01:55,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:01:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1183903009, now seen corresponding path program 31 times [2023-08-24 15:01:55,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:01:55,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109850534] [2023-08-24 15:01:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:01:55,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:01:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:01:56,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:01:56,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109850534] [2023-08-24 15:01:56,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109850534] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:01:56,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618977969] [2023-08-24 15:01:56,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:01:56,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:01:56,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:01:56,803 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 15:01:56,805 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 15:01:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:01:57,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 15:01:57,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:01:57,049 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:01:57,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:01:57,095 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 15:01:57,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-24 15:01:57,151 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 15:01:57,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 15:01:57,400 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-08-24 15:01:57,608 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-08-24 15:01:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:57,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:01:57,782 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:01:57,782 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 179 treesize of output 199 [2023-08-24 15:01:58,404 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:58,404 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:01:58,450 INFO L322 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-24 15:01:58,451 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 38 treesize of output 61 [2023-08-24 15:01:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:01:58,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618977969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:01:58,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:01:58,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 31 [2023-08-24 15:01:58,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909236753] [2023-08-24 15:01:58,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:01:58,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 15:01:58,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:01:58,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 15:01:58,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 15:01:58,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 15:01:58,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 575 transitions, 10555 flow. Second operand has 33 states, 33 states have (on average 203.12121212121212) internal successors, (6703), 33 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:01:58,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:01:58,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 15:01:58,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:00,832 INFO L124 PetriNetUnfolderBase]: 4894/7152 cut-off events. [2023-08-24 15:02:00,832 INFO L125 PetriNetUnfolderBase]: For 133873/133873 co-relation queries the response was YES. [2023-08-24 15:02:00,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52743 conditions, 7152 events. 4894/7152 cut-off events. For 133873/133873 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36811 event pairs, 1518 based on Foata normal form. 1/7153 useless extension candidates. Maximal degree in co-relation 52064. Up to 6606 conditions per place. [2023-08-24 15:02:00,894 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 424 selfloop transitions, 192 changer transitions 1/617 dead transitions. [2023-08-24 15:02:00,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 617 transitions, 12428 flow [2023-08-24 15:02:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 15:02:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 15:02:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2905 transitions. [2023-08-24 15:02:00,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29856115107913667 [2023-08-24 15:02:00,896 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2905 transitions. [2023-08-24 15:02:00,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2905 transitions. [2023-08-24 15:02:00,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:00,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2905 transitions. [2023-08-24 15:02:00,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 207.5) internal successors, (2905), 14 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:00,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 695.0) internal successors, (10425), 15 states have internal predecessors, (10425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:00,902 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 695.0) internal successors, (10425), 15 states have internal predecessors, (10425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:00,902 INFO L175 Difference]: Start difference. First operand has 292 places, 575 transitions, 10555 flow. Second operand 14 states and 2905 transitions. [2023-08-24 15:02:00,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 617 transitions, 12428 flow [2023-08-24 15:02:01,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 617 transitions, 11804 flow, removed 197 selfloop flow, removed 6 redundant places. [2023-08-24 15:02:01,248 INFO L231 Difference]: Finished difference. Result has 301 places, 585 transitions, 10794 flow [2023-08-24 15:02:01,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=9935, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10794, PETRI_PLACES=301, PETRI_TRANSITIONS=585} [2023-08-24 15:02:01,248 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 269 predicate places. [2023-08-24 15:02:01,248 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 585 transitions, 10794 flow [2023-08-24 15:02:01,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 203.12121212121212) internal successors, (6703), 33 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:01,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:01,249 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, 1, 1, 1, 1] [2023-08-24 15:02:01,259 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 15:02:01,455 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 15:02:01,455 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 15:02:01,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:01,455 INFO L85 PathProgramCache]: Analyzing trace with hash -608584663, now seen corresponding path program 32 times [2023-08-24 15:02:01,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:01,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522211547] [2023-08-24 15:02:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:01,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:02:02,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:02,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522211547] [2023-08-24 15:02:02,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522211547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:02,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181665627] [2023-08-24 15:02:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:02:02,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:02,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:02,342 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 15:02:02,342 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 15:02:02,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:02:02,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:02:02,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 15:02:02,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:02,584 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:02:02,584 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:02:02,623 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 15:02:02,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-24 15:02:02,660 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:02:02,660 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 11 treesize of output 11 [2023-08-24 15:02:02,829 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:02:02,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-08-24 15:02:02,934 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:02,935 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 102 treesize of output 106 [2023-08-24 15:02:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:03,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:03,392 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:03,393 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 90 treesize of output 134 [2023-08-24 15:02:03,517 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:03,535 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 15:02:03,536 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 42 treesize of output 38 [2023-08-24 15:02:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:03,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181665627] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:02:03,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:02:03,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2023-08-24 15:02:03,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634801509] [2023-08-24 15:02:03,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:02:03,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 15:02:03,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:02:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 15:02:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-08-24 15:02:03,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 695 [2023-08-24 15:02:03,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 585 transitions, 10794 flow. Second operand has 29 states, 29 states have (on average 195.10344827586206) internal successors, (5658), 29 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:03,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:02:03,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 695 [2023-08-24 15:02:03,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:05,823 INFO L124 PetriNetUnfolderBase]: 4974/7269 cut-off events. [2023-08-24 15:02:05,823 INFO L125 PetriNetUnfolderBase]: For 132404/132404 co-relation queries the response was YES. [2023-08-24 15:02:05,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53263 conditions, 7269 events. 4974/7269 cut-off events. For 132404/132404 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 37531 event pairs, 1593 based on Foata normal form. 1/7270 useless extension candidates. Maximal degree in co-relation 52581. Up to 6869 conditions per place. [2023-08-24 15:02:05,884 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 441 selfloop transitions, 175 changer transitions 1/617 dead transitions. [2023-08-24 15:02:05,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 617 transitions, 12493 flow [2023-08-24 15:02:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:02:05,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:02:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2398 transitions. [2023-08-24 15:02:05,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2875299760191847 [2023-08-24 15:02:05,886 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2398 transitions. [2023-08-24 15:02:05,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2398 transitions. [2023-08-24 15:02:05,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:05,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2398 transitions. [2023-08-24 15:02:05,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 199.83333333333334) internal successors, (2398), 12 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:05,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:05,891 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:05,891 INFO L175 Difference]: Start difference. First operand has 301 places, 585 transitions, 10794 flow. Second operand 12 states and 2398 transitions. [2023-08-24 15:02:05,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 617 transitions, 12493 flow [2023-08-24 15:02:06,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 617 transitions, 11869 flow, removed 199 selfloop flow, removed 9 redundant places. [2023-08-24 15:02:06,301 INFO L231 Difference]: Finished difference. Result has 305 places, 591 transitions, 10848 flow [2023-08-24 15:02:06,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10170, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10848, PETRI_PLACES=305, PETRI_TRANSITIONS=591} [2023-08-24 15:02:06,303 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 273 predicate places. [2023-08-24 15:02:06,303 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 591 transitions, 10848 flow [2023-08-24 15:02:06,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 195.10344827586206) internal successors, (5658), 29 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:06,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:06,304 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, 1, 1, 1, 1] [2023-08-24 15:02:06,310 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 15:02:06,509 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 15:02:06,509 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 15:02:06,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:06,510 INFO L85 PathProgramCache]: Analyzing trace with hash -502217385, now seen corresponding path program 33 times [2023-08-24 15:02:06,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:06,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809434532] [2023-08-24 15:02:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:06,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:07,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809434532] [2023-08-24 15:02:07,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809434532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147197519] [2023-08-24 15:02:07,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:02:07,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:07,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:07,082 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 15:02:07,083 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 15:02:07,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:02:07,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:02:07,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 15:02:07,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:07,359 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:02:07,359 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:02:07,402 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 15:02:07,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-24 15:02:07,455 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 15:02:07,455 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 15:02:07,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-08-24 15:02:07,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-08-24 15:02:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:07,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:07,993 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:07,994 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 179 treesize of output 199 [2023-08-24 15:02:08,770 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:08,770 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:08,815 INFO L322 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-24 15:02:08,816 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 38 treesize of output 61 [2023-08-24 15:02:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:09,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147197519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:02:09,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:02:09,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 15:02:09,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677487723] [2023-08-24 15:02:09,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:02:09,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:02:09,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:02:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:02:09,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:02:09,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 15:02:09,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 591 transitions, 10848 flow. Second operand has 30 states, 30 states have (on average 211.33333333333334) internal successors, (6340), 30 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:09,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:02:09,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 15:02:09,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:11,075 INFO L124 PetriNetUnfolderBase]: 5054/7386 cut-off events. [2023-08-24 15:02:11,075 INFO L125 PetriNetUnfolderBase]: For 131245/131245 co-relation queries the response was YES. [2023-08-24 15:02:11,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53610 conditions, 7386 events. 5054/7386 cut-off events. For 131245/131245 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 38409 event pairs, 1623 based on Foata normal form. 1/7387 useless extension candidates. Maximal degree in co-relation 52925. Up to 6946 conditions per place. [2023-08-24 15:02:11,153 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 442 selfloop transitions, 181 changer transitions 1/624 dead transitions. [2023-08-24 15:02:11,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 624 transitions, 12575 flow [2023-08-24 15:02:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:02:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:02:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2591 transitions. [2023-08-24 15:02:11,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31067146282973623 [2023-08-24 15:02:11,155 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2591 transitions. [2023-08-24 15:02:11,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2591 transitions. [2023-08-24 15:02:11,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:11,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2591 transitions. [2023-08-24 15:02:11,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 215.91666666666666) internal successors, (2591), 12 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:11,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:11,160 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:11,160 INFO L175 Difference]: Start difference. First operand has 305 places, 591 transitions, 10848 flow. Second operand 12 states and 2591 transitions. [2023-08-24 15:02:11,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 624 transitions, 12575 flow [2023-08-24 15:02:11,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 624 transitions, 12081 flow, removed 144 selfloop flow, removed 8 redundant places. [2023-08-24 15:02:11,729 INFO L231 Difference]: Finished difference. Result has 310 places, 597 transitions, 11056 flow [2023-08-24 15:02:11,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10354, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11056, PETRI_PLACES=310, PETRI_TRANSITIONS=597} [2023-08-24 15:02:11,730 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 278 predicate places. [2023-08-24 15:02:11,730 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 597 transitions, 11056 flow [2023-08-24 15:02:11,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 211.33333333333334) internal successors, (6340), 30 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:11,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:11,731 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, 1, 1, 1, 1] [2023-08-24 15:02:11,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-24 15:02:11,936 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 15:02:11,936 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 15:02:11,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1113700187, now seen corresponding path program 34 times [2023-08-24 15:02:11,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:11,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019040636] [2023-08-24 15:02:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:12,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:12,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019040636] [2023-08-24 15:02:12,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019040636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:12,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925485362] [2023-08-24 15:02:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:02:12,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:12,554 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 15:02:12,557 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 15:02:12,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:02:12,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:02:12,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 15:02:12,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:12,796 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:02:12,796 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:02:12,832 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 15:02:12,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-24 15:02:12,891 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 15:02:12,891 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 15:02:13,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-08-24 15:02:13,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2023-08-24 15:02:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:13,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:13,435 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:13,436 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 195 treesize of output 215 [2023-08-24 15:02:14,107 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:14,108 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:14,141 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 15:02:14,141 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 42 treesize of output 65 [2023-08-24 15:02:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:14,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925485362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:02:14,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:02:14,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-24 15:02:14,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856943934] [2023-08-24 15:02:14,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:02:14,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 15:02:14,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:02:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 15:02:14,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2023-08-24 15:02:14,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 15:02:14,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 597 transitions, 11056 flow. Second operand has 29 states, 29 states have (on average 211.27586206896552) internal successors, (6127), 29 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:14,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:02:14,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 15:02:14,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:16,929 INFO L124 PetriNetUnfolderBase]: 5144/7517 cut-off events. [2023-08-24 15:02:16,929 INFO L125 PetriNetUnfolderBase]: For 137634/137634 co-relation queries the response was YES. [2023-08-24 15:02:16,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54791 conditions, 7517 events. 5144/7517 cut-off events. For 137634/137634 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 39253 event pairs, 1673 based on Foata normal form. 1/7518 useless extension candidates. Maximal degree in co-relation 54103. Up to 7117 conditions per place. [2023-08-24 15:02:16,993 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 455 selfloop transitions, 176 changer transitions 1/632 dead transitions. [2023-08-24 15:02:16,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 632 transitions, 12842 flow [2023-08-24 15:02:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:02:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:02:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2589 transitions. [2023-08-24 15:02:16,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.310431654676259 [2023-08-24 15:02:16,995 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2589 transitions. [2023-08-24 15:02:16,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2589 transitions. [2023-08-24 15:02:16,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:16,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2589 transitions. [2023-08-24 15:02:17,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 215.75) internal successors, (2589), 12 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 15:02:17,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:17,010 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:17,010 INFO L175 Difference]: Start difference. First operand has 310 places, 597 transitions, 11056 flow. Second operand 12 states and 2589 transitions. [2023-08-24 15:02:17,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 632 transitions, 12842 flow [2023-08-24 15:02:17,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 632 transitions, 12315 flow, removed 150 selfloop flow, removed 8 redundant places. [2023-08-24 15:02:17,428 INFO L231 Difference]: Finished difference. Result has 316 places, 606 transitions, 11281 flow [2023-08-24 15:02:17,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10532, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11281, PETRI_PLACES=316, PETRI_TRANSITIONS=606} [2023-08-24 15:02:17,428 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 284 predicate places. [2023-08-24 15:02:17,429 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 606 transitions, 11281 flow [2023-08-24 15:02:17,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 211.27586206896552) internal successors, (6127), 29 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:17,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:17,430 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, 1, 1, 1, 1, 1] [2023-08-24 15:02:17,435 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 15:02:17,634 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 15:02:17,635 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 15:02:17,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash -103490327, now seen corresponding path program 35 times [2023-08-24 15:02:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:17,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733490504] [2023-08-24 15:02:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:18,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:18,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733490504] [2023-08-24 15:02:18,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733490504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:18,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981364321] [2023-08-24 15:02:18,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:02:18,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:18,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:18,284 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 15:02:18,286 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 15:02:18,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:02:18,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:02:18,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 15:02:18,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:18,527 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:02:18,557 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:02:18,558 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 11 treesize of output 11 [2023-08-24 15:02:18,837 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:02:18,837 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-08-24 15:02:19,030 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:19,030 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 73 treesize of output 97 [2023-08-24 15:02:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:19,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:19,956 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:19,956 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 78 treesize of output 118 [2023-08-24 15:02:20,101 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:20,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981364321] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:02:20,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:02:20,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-24 15:02:20,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955283486] [2023-08-24 15:02:20,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:02:20,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 15:02:20,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:02:20,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 15:02:20,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-08-24 15:02:20,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 15:02:20,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 606 transitions, 11281 flow. Second operand has 23 states, 23 states have (on average 226.56521739130434) internal successors, (5211), 23 states have internal predecessors, (5211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:20,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:02:20,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 15:02:20,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:22,563 INFO L124 PetriNetUnfolderBase]: 5232/7646 cut-off events. [2023-08-24 15:02:22,563 INFO L125 PetriNetUnfolderBase]: For 140218/140218 co-relation queries the response was YES. [2023-08-24 15:02:22,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55652 conditions, 7646 events. 5232/7646 cut-off events. For 140218/140218 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 40021 event pairs, 1674 based on Foata normal form. 1/7647 useless extension candidates. Maximal degree in co-relation 54960. Up to 7169 conditions per place. [2023-08-24 15:02:22,641 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 459 selfloop transitions, 189 changer transitions 1/649 dead transitions. [2023-08-24 15:02:22,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 649 transitions, 13021 flow [2023-08-24 15:02:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:02:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:02:22,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2553 transitions. [2023-08-24 15:02:22,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.333943754087639 [2023-08-24 15:02:22,644 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2553 transitions. [2023-08-24 15:02:22,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2553 transitions. [2023-08-24 15:02:22,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:22,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2553 transitions. [2023-08-24 15:02:22,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 232.0909090909091) internal successors, (2553), 11 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:22,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:22,650 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:22,650 INFO L175 Difference]: Start difference. First operand has 316 places, 606 transitions, 11281 flow. Second operand 11 states and 2553 transitions. [2023-08-24 15:02:22,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 649 transitions, 13021 flow [2023-08-24 15:02:23,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 649 transitions, 12500 flow, removed 160 selfloop flow, removed 7 redundant places. [2023-08-24 15:02:23,039 INFO L231 Difference]: Finished difference. Result has 321 places, 612 transitions, 11382 flow [2023-08-24 15:02:23,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10760, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11382, PETRI_PLACES=321, PETRI_TRANSITIONS=612} [2023-08-24 15:02:23,040 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 289 predicate places. [2023-08-24 15:02:23,040 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 612 transitions, 11382 flow [2023-08-24 15:02:23,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 226.56521739130434) internal successors, (5211), 23 states have internal predecessors, (5211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:23,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:23,041 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, 1, 1, 1, 1] [2023-08-24 15:02:23,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 15:02:23,247 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 15:02:23,247 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 15:02:23,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:23,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1426950305, now seen corresponding path program 36 times [2023-08-24 15:02:23,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:23,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124596918] [2023-08-24 15:02:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:23,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:02:24,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:24,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124596918] [2023-08-24 15:02:24,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124596918] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:24,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771764790] [2023-08-24 15:02:24,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:02:24,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:24,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:24,235 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 15:02:24,237 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 15:02:24,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:02:24,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:02:24,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 15:02:24,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:24,507 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:02:24,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:02:24,557 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 15:02:24,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-24 15:02:24,616 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 15:02:24,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 15:02:24,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-08-24 15:02:25,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-08-24 15:02:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:25,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:25,168 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:25,168 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 195 treesize of output 215 [2023-08-24 15:02:25,960 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:25,961 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:26,014 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 15:02:26,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-08-24 15:02:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:26,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771764790] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:02:26,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:02:26,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 32 [2023-08-24 15:02:26,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612876676] [2023-08-24 15:02:26,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:02:26,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 15:02:26,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:02:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 15:02:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 15:02:26,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 695 [2023-08-24 15:02:26,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 612 transitions, 11382 flow. Second operand has 34 states, 34 states have (on average 204.1764705882353) internal successors, (6942), 34 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:26,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:02:26,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 695 [2023-08-24 15:02:26,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:28,901 INFO L124 PetriNetUnfolderBase]: 5320/7775 cut-off events. [2023-08-24 15:02:28,901 INFO L125 PetriNetUnfolderBase]: For 143557/143557 co-relation queries the response was YES. [2023-08-24 15:02:28,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56587 conditions, 7775 events. 5320/7775 cut-off events. For 143557/143557 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 40797 event pairs, 1736 based on Foata normal form. 1/7776 useless extension candidates. Maximal degree in co-relation 55892. Up to 7365 conditions per place. [2023-08-24 15:02:28,982 INFO L140 encePairwiseOnDemand]: 683/695 looper letters, 468 selfloop transitions, 177 changer transitions 1/646 dead transitions. [2023-08-24 15:02:28,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 646 transitions, 13073 flow [2023-08-24 15:02:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:02:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:02:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2710 transitions. [2023-08-24 15:02:28,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2999446596568899 [2023-08-24 15:02:28,984 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2710 transitions. [2023-08-24 15:02:28,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2710 transitions. [2023-08-24 15:02:28,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:28,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2710 transitions. [2023-08-24 15:02:28,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.46153846153845) internal successors, (2710), 13 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:28,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:28,990 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 695.0) internal successors, (9730), 14 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:28,990 INFO L175 Difference]: Start difference. First operand has 321 places, 612 transitions, 11382 flow. Second operand 13 states and 2710 transitions. [2023-08-24 15:02:28,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 646 transitions, 13073 flow [2023-08-24 15:02:29,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 646 transitions, 12514 flow, removed 95 selfloop flow, removed 8 redundant places. [2023-08-24 15:02:29,707 INFO L231 Difference]: Finished difference. Result has 327 places, 618 transitions, 11432 flow [2023-08-24 15:02:29,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10823, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11432, PETRI_PLACES=327, PETRI_TRANSITIONS=618} [2023-08-24 15:02:29,708 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 295 predicate places. [2023-08-24 15:02:29,708 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 618 transitions, 11432 flow [2023-08-24 15:02:29,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 204.1764705882353) internal successors, (6942), 34 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:29,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:29,709 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, 1, 1, 1, 1] [2023-08-24 15:02:29,715 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 15:02:29,914 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 15:02:29,915 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 15:02:29,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:29,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1208321187, now seen corresponding path program 37 times [2023-08-24 15:02:29,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:29,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716698750] [2023-08-24 15:02:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:29,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:30,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:30,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716698750] [2023-08-24 15:02:30,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716698750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:30,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534670038] [2023-08-24 15:02:30,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:02:30,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:30,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:30,405 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 15:02:30,408 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 15:02:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:30,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 15:02:30,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:30,829 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:30,877 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 35 treesize of output 23 [2023-08-24 15:02:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:30,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:30,997 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:30,997 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 42 treesize of output 95 [2023-08-24 15:02:31,137 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 15:02:31,138 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 42 treesize of output 38 [2023-08-24 15:02:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:31,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534670038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:02:31,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:02:31,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 15:02:31,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622050640] [2023-08-24 15:02:31,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:02:31,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 15:02:31,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:02:31,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 15:02:31,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-24 15:02:31,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 15:02:31,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 618 transitions, 11432 flow. Second operand has 17 states, 17 states have (on average 241.23529411764707) internal successors, (4101), 17 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:31,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:02:31,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 15:02:31,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:33,211 INFO L124 PetriNetUnfolderBase]: 5410/7908 cut-off events. [2023-08-24 15:02:33,212 INFO L125 PetriNetUnfolderBase]: For 150259/150259 co-relation queries the response was YES. [2023-08-24 15:02:33,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57345 conditions, 7908 events. 5410/7908 cut-off events. For 150259/150259 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 41692 event pairs, 1775 based on Foata normal form. 1/7909 useless extension candidates. Maximal degree in co-relation 56648. Up to 7490 conditions per place. [2023-08-24 15:02:33,288 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 485 selfloop transitions, 170 changer transitions 1/656 dead transitions. [2023-08-24 15:02:33,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 656 transitions, 13171 flow [2023-08-24 15:02:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:02:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:02:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2229 transitions. [2023-08-24 15:02:33,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563549160671463 [2023-08-24 15:02:33,290 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2229 transitions. [2023-08-24 15:02:33,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2229 transitions. [2023-08-24 15:02:33,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:33,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2229 transitions. [2023-08-24 15:02:33,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 247.66666666666666) internal successors, (2229), 9 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:33,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:33,294 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:33,294 INFO L175 Difference]: Start difference. First operand has 327 places, 618 transitions, 11432 flow. Second operand 9 states and 2229 transitions. [2023-08-24 15:02:33,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 656 transitions, 13171 flow [2023-08-24 15:02:33,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 656 transitions, 12623 flow, removed 101 selfloop flow, removed 10 redundant places. [2023-08-24 15:02:33,884 INFO L231 Difference]: Finished difference. Result has 327 places, 624 transitions, 11485 flow [2023-08-24 15:02:33,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10884, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11485, PETRI_PLACES=327, PETRI_TRANSITIONS=624} [2023-08-24 15:02:33,885 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 295 predicate places. [2023-08-24 15:02:33,885 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 624 transitions, 11485 flow [2023-08-24 15:02:33,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 241.23529411764707) internal successors, (4101), 17 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:33,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:33,886 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, 1, 1, 1, 1] [2023-08-24 15:02:33,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-24 15:02:34,091 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 15:02:34,091 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 15:02:34,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:34,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1539858673, now seen corresponding path program 38 times [2023-08-24 15:02:34,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:34,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596677518] [2023-08-24 15:02:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:34,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:34,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:34,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596677518] [2023-08-24 15:02:34,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596677518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:34,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048427180] [2023-08-24 15:02:34,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:02:34,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:34,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:34,715 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 15:02:34,720 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 15:02:34,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:02:34,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:02:34,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 15:02:34,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:34,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:02:35,017 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:02:35,017 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 11 treesize of output 11 [2023-08-24 15:02:35,203 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:02:35,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-08-24 15:02:35,428 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:35,428 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 73 treesize of output 97 [2023-08-24 15:02:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:35,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:36,951 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:36,952 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 90 treesize of output 134 [2023-08-24 15:02:37,059 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:37,083 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 15:02:37,084 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 42 treesize of output 38 [2023-08-24 15:02:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:37,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048427180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:02:37,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:02:37,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-24 15:02:37,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921933759] [2023-08-24 15:02:37,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:02:37,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 15:02:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:02:37,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 15:02:37,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-08-24 15:02:37,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 15:02:37,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 624 transitions, 11485 flow. Second operand has 23 states, 23 states have (on average 211.65217391304347) internal successors, (4868), 23 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:37,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:02:37,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 15:02:37,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:39,655 INFO L124 PetriNetUnfolderBase]: 5498/8037 cut-off events. [2023-08-24 15:02:39,655 INFO L125 PetriNetUnfolderBase]: For 157496/157496 co-relation queries the response was YES. [2023-08-24 15:02:39,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58121 conditions, 8037 events. 5498/8037 cut-off events. For 157496/157496 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 42470 event pairs, 1826 based on Foata normal form. 1/8038 useless extension candidates. Maximal degree in co-relation 57422. Up to 7623 conditions per place. [2023-08-24 15:02:39,725 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 483 selfloop transitions, 176 changer transitions 1/660 dead transitions. [2023-08-24 15:02:39,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 660 transitions, 13231 flow [2023-08-24 15:02:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:02:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:02:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2384 transitions. [2023-08-24 15:02:39,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118378024852845 [2023-08-24 15:02:39,727 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2384 transitions. [2023-08-24 15:02:39,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2384 transitions. [2023-08-24 15:02:39,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:39,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2384 transitions. [2023-08-24 15:02:39,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.72727272727272) internal successors, (2384), 11 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:39,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:39,732 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:39,732 INFO L175 Difference]: Start difference. First operand has 327 places, 624 transitions, 11485 flow. Second operand 11 states and 2384 transitions. [2023-08-24 15:02:39,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 660 transitions, 13231 flow [2023-08-24 15:02:40,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 660 transitions, 12725 flow, removed 107 selfloop flow, removed 5 redundant places. [2023-08-24 15:02:40,239 INFO L231 Difference]: Finished difference. Result has 334 places, 630 transitions, 11598 flow [2023-08-24 15:02:40,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10979, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11598, PETRI_PLACES=334, PETRI_TRANSITIONS=630} [2023-08-24 15:02:40,240 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 302 predicate places. [2023-08-24 15:02:40,240 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 630 transitions, 11598 flow [2023-08-24 15:02:40,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.65217391304347) internal successors, (4868), 23 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:40,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:40,241 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, 1, 1, 1, 1] [2023-08-24 15:02:40,247 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 15:02:40,446 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 15:02:40,447 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 15:02:40,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash 527477929, now seen corresponding path program 39 times [2023-08-24 15:02:40,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:40,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249330663] [2023-08-24 15:02:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:40,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:41,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:41,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249330663] [2023-08-24 15:02:41,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249330663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:41,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64030341] [2023-08-24 15:02:41,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:02:41,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:41,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:41,146 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 15:02:41,148 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 15:02:41,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:02:41,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:02:41,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 81 conjunts are in the unsatisfiable core [2023-08-24 15:02:41,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:41,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:02:41,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:02:41,741 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 15:02:41,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-08-24 15:02:41,816 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:41,817 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 20 [2023-08-24 15:02:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:41,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:41,918 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_2919 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2919))) (+ (select (select .cse1 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse1 c_~B~0.base) c_~B~0.offset))))) (forall ((v_ArrVal_2919 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2919))) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) .cse0)))) is different from false [2023-08-24 15:02:41,938 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) c_~B~0.offset))))) (and (forall ((v_ArrVal_2919 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2919))) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) .cse1)) (forall ((v_ArrVal_2919 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2919))) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse2 c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-24 15:02:41,977 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:41,977 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 158 treesize of output 154 [2023-08-24 15:02:41,990 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:41,990 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 78 treesize of output 78 [2023-08-24 15:02:42,355 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:42,355 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:42,395 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 15:02:42,396 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 34 treesize of output 57 [2023-08-24 15:02:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-24 15:02:42,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64030341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:02:42,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:02:42,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 15:02:42,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404222419] [2023-08-24 15:02:42,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:02:42,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:02:42,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:02:42,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:02:42,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=646, Unknown=2, NotChecked=106, Total=870 [2023-08-24 15:02:42,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 695 [2023-08-24 15:02:42,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 630 transitions, 11598 flow. Second operand has 30 states, 30 states have (on average 215.33333333333334) internal successors, (6460), 30 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:42,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:02:42,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 695 [2023-08-24 15:02:42,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:45,150 INFO L124 PetriNetUnfolderBase]: 5688/8316 cut-off events. [2023-08-24 15:02:45,151 INFO L125 PetriNetUnfolderBase]: For 185532/185532 co-relation queries the response was YES. [2023-08-24 15:02:45,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61028 conditions, 8316 events. 5688/8316 cut-off events. For 185532/185532 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 44336 event pairs, 1754 based on Foata normal form. 1/8317 useless extension candidates. Maximal degree in co-relation 60328. Up to 7486 conditions per place. [2023-08-24 15:02:45,240 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 482 selfloop transitions, 205 changer transitions 1/688 dead transitions. [2023-08-24 15:02:45,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 688 transitions, 13892 flow [2023-08-24 15:02:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:02:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:02:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2018 transitions. [2023-08-24 15:02:45,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3226219024780176 [2023-08-24 15:02:45,242 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2018 transitions. [2023-08-24 15:02:45,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2018 transitions. [2023-08-24 15:02:45,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:45,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2018 transitions. [2023-08-24 15:02:45,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 224.22222222222223) internal successors, (2018), 9 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:45,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:45,247 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:45,247 INFO L175 Difference]: Start difference. First operand has 334 places, 630 transitions, 11598 flow. Second operand 9 states and 2018 transitions. [2023-08-24 15:02:45,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 688 transitions, 13892 flow [2023-08-24 15:02:46,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 688 transitions, 13334 flow, removed 107 selfloop flow, removed 8 redundant places. [2023-08-24 15:02:46,017 INFO L231 Difference]: Finished difference. Result has 337 places, 645 transitions, 12186 flow [2023-08-24 15:02:46,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11040, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12186, PETRI_PLACES=337, PETRI_TRANSITIONS=645} [2023-08-24 15:02:46,018 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 305 predicate places. [2023-08-24 15:02:46,018 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 645 transitions, 12186 flow [2023-08-24 15:02:46,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 215.33333333333334) internal successors, (6460), 30 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:46,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:46,019 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, 1, 1, 1, 1] [2023-08-24 15:02:46,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-08-24 15:02:46,224 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 15:02:46,224 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 15:02:46,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1570577687, now seen corresponding path program 40 times [2023-08-24 15:02:46,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:46,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335078630] [2023-08-24 15:02:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:46,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:46,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:46,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335078630] [2023-08-24 15:02:46,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335078630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:46,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544427416] [2023-08-24 15:02:46,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:02:46,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:46,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:46,849 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 15:02:46,851 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 15:02:47,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:02:47,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:02:47,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-24 15:02:47,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:47,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:02:47,327 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 15:02:47,440 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:47,440 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 35 treesize of output 23 [2023-08-24 15:02:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:47,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:47,571 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((v_ArrVal_2986 (Array Int Int)) (~A~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2986))) (let ((.cse0 (select .cse1 ~A~0.base))) (<= (+ (select .cse0 c_~A~0.offset) (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0) (+ c_~asum~0 c_~bsum~0 (select .cse0 .cse2)))))) (forall ((v_ArrVal_2986 (Array Int Int)) (~A~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2986))) (let ((.cse3 (select .cse4 ~A~0.base))) (<= (+ c_~asum~0 c_~bsum~0 (select .cse3 .cse2)) (+ (select .cse3 c_~A~0.offset) (select (select .cse4 c_~B~0.base) c_~B~0.offset) c_~csum~0))))))) is different from false [2023-08-24 15:02:47,606 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:47,606 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 154 treesize of output 166 [2023-08-24 15:02:47,622 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:47,622 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 90 treesize of output 98 [2023-08-24 15:02:47,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-24 15:02:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544427416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:02:48,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:02:48,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-24 15:02:48,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382130330] [2023-08-24 15:02:48,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:02:48,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 15:02:48,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:02:48,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 15:02:48,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=591, Unknown=1, NotChecked=50, Total=756 [2023-08-24 15:02:48,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 695 [2023-08-24 15:02:48,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 645 transitions, 12186 flow. Second operand has 28 states, 28 states have (on average 230.39285714285714) internal successors, (6451), 28 states have internal predecessors, (6451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:48,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:02:48,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 695 [2023-08-24 15:02:48,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:02:50,421 INFO L124 PetriNetUnfolderBase]: 5870/8583 cut-off events. [2023-08-24 15:02:50,421 INFO L125 PetriNetUnfolderBase]: For 223640/223640 co-relation queries the response was YES. [2023-08-24 15:02:50,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64734 conditions, 8583 events. 5870/8583 cut-off events. For 223640/223640 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 46108 event pairs, 1840 based on Foata normal form. 1/8584 useless extension candidates. Maximal degree in co-relation 64031. Up to 7789 conditions per place. [2023-08-24 15:02:50,499 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 496 selfloop transitions, 202 changer transitions 1/699 dead transitions. [2023-08-24 15:02:50,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 699 transitions, 14548 flow [2023-08-24 15:02:50,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:02:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:02:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2151 transitions. [2023-08-24 15:02:50,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34388489208633094 [2023-08-24 15:02:50,501 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2151 transitions. [2023-08-24 15:02:50,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2151 transitions. [2023-08-24 15:02:50,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:02:50,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2151 transitions. [2023-08-24 15:02:50,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 239.0) internal successors, (2151), 9 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:50,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:50,506 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:50,506 INFO L175 Difference]: Start difference. First operand has 337 places, 645 transitions, 12186 flow. Second operand 9 states and 2151 transitions. [2023-08-24 15:02:50,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 699 transitions, 14548 flow [2023-08-24 15:02:51,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 699 transitions, 13831 flow, removed 268 selfloop flow, removed 3 redundant places. [2023-08-24 15:02:51,352 INFO L231 Difference]: Finished difference. Result has 345 places, 658 transitions, 12641 flow [2023-08-24 15:02:51,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11491, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12641, PETRI_PLACES=345, PETRI_TRANSITIONS=658} [2023-08-24 15:02:51,352 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 313 predicate places. [2023-08-24 15:02:51,352 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 658 transitions, 12641 flow [2023-08-24 15:02:51,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 230.39285714285714) internal successors, (6451), 28 states have internal predecessors, (6451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:02:51,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:02:51,353 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, 1, 1, 1, 1] [2023-08-24 15:02:51,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-24 15:02:51,558 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 15:02:51,558 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 15:02:51,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:02:51,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1823576543, now seen corresponding path program 41 times [2023-08-24 15:02:51,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:02:51,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909544212] [2023-08-24 15:02:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:02:51,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:02:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:02:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:52,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:02:52,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909544212] [2023-08-24 15:02:52,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909544212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:02:52,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455217140] [2023-08-24 15:02:52,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:02:52,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:02:52,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:02:52,207 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 15:02:52,209 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 15:02:52,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:02:52,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:02:52,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 15:02:52,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:02:52,465 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:02:52,516 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:02:52,517 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 11 treesize of output 11 [2023-08-24 15:02:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:02:52,710 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 15:02:52,781 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:02:52,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-08-24 15:02:52,952 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:52,953 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 102 treesize of output 106 [2023-08-24 15:02:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:02:52,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:02:54,354 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) c_~B~0.offset))) (and (forall ((~C~0.offset Int) (v_ArrVal_3054 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3054))) (let ((.cse0 (select (select .cse2 c_~B~0.base) c_~B~0.offset)) (.cse1 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) (<= (+ c_~csum~0 .cse0 .cse1) (+ (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) .cse3) c_~asum~0 c_~bsum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_3054 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3054))) (let ((.cse5 (select (select .cse4 c_~B~0.base) c_~B~0.offset)) (.cse6 (select (select .cse4 c_~A~0.base) c_~A~0.offset))) (<= (+ (select (select (store .cse4 c_~C~0.base (store (select .cse4 c_~C~0.base) ~C~0.offset (+ .cse5 .cse6))) c_~B~0.base) .cse3) c_~asum~0 c_~bsum~0) (+ c_~csum~0 .cse5 .cse6))))))) is different from false [2023-08-24 15:02:54,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:54,391 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 2766 treesize of output 2444 [2023-08-24 15:02:54,419 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:54,420 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 722 treesize of output 662 [2023-08-24 15:02:58,673 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:58,690 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:58,690 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 97 [2023-08-24 15:02:58,777 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,780 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,786 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,790 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,795 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,806 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,811 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,818 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,822 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,825 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,828 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,836 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,840 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,844 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,847 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:02:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:02:58,854 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:58,864 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:58,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 115 [2023-08-24 15:02:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:02:58,945 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:58,956 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:58,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 280 treesize of output 186 [2023-08-24 15:02:59,037 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 12 treesize of output 6 [2023-08-24 15:02:59,045 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:59,045 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 18 treesize of output 19 [2023-08-24 15:02:59,071 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:59,097 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 15:02:59,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 1306 treesize of output 826 [2023-08-24 15:02:59,448 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:59,460 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:59,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 39 [2023-08-24 15:02:59,492 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:02:59,514 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:59,515 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 26 treesize of output 67 [2023-08-24 15:02:59,647 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 12 treesize of output 6 [2023-08-24 15:02:59,661 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 14 treesize of output 8 [2023-08-24 15:02:59,696 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:59,697 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 16 treesize of output 17 [2023-08-24 15:02:59,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:02:59,722 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:59,722 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 68 [2023-08-24 15:02:59,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:02:59,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:02:59,764 INFO L322 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-08-24 15:02:59,764 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 278 treesize of output 1 [2023-08-24 15:02:59,769 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 12 treesize of output 6 [2023-08-24 15:02:59,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:02:59,793 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:02:59,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 153 treesize of output 123 [2023-08-24 15:02:59,956 INFO L322 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2023-08-24 15:02:59,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1310 treesize of output 838 [2023-08-24 15:03:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:00,364 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:00,364 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 216 treesize of output 150 [2023-08-24 15:03:00,394 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,399 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,403 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,419 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:00,432 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:00,432 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 25 [2023-08-24 15:03:00,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:00,451 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-24 15:03:00,494 INFO L322 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2023-08-24 15:03:00,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 47 [2023-08-24 15:03:00,616 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 15:03:00,616 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 1310 treesize of output 1 [2023-08-24 15:03:00,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:00,635 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-24 15:03:00,651 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 15:03:00,651 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 26 treesize of output 22 [2023-08-24 15:03:00,677 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,690 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,699 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,704 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,712 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,717 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,723 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,766 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:00,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1306 treesize of output 1088 [2023-08-24 15:03:00,787 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 15:03:00,788 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 1088 treesize of output 1 [2023-08-24 15:03:00,796 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,801 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:00,807 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-08-24 15:03:00,817 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,822 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,837 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:00,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2023-08-24 15:03:00,856 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,863 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,869 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:00,956 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:00,958 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:01,007 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 15:03:01,008 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 228 [2023-08-24 15:03:01,025 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:01,025 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 50 treesize of output 43 [2023-08-24 15:03:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-24 15:03:01,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455217140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:03:01,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:03:01,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-24 15:03:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056134523] [2023-08-24 15:03:01,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:03:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 15:03:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:03:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 15:03:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=750, Unknown=1, NotChecked=56, Total=930 [2023-08-24 15:03:01,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 695 [2023-08-24 15:03:01,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 658 transitions, 12641 flow. Second operand has 31 states, 31 states have (on average 224.25806451612902) internal successors, (6952), 31 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:01,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:03:01,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 695 [2023-08-24 15:03:01,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:03:04,155 INFO L124 PetriNetUnfolderBase]: 5958/8712 cut-off events. [2023-08-24 15:03:04,155 INFO L125 PetriNetUnfolderBase]: For 203531/203531 co-relation queries the response was YES. [2023-08-24 15:03:04,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64957 conditions, 8712 events. 5958/8712 cut-off events. For 203531/203531 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 46858 event pairs, 1962 based on Foata normal form. 1/8713 useless extension candidates. Maximal degree in co-relation 64250. Up to 8118 conditions per place. [2023-08-24 15:03:04,231 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 504 selfloop transitions, 196 changer transitions 1/701 dead transitions. [2023-08-24 15:03:04,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 701 transitions, 14556 flow [2023-08-24 15:03:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:03:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:03:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2757 transitions. [2023-08-24 15:03:04,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33057553956834534 [2023-08-24 15:03:04,233 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2757 transitions. [2023-08-24 15:03:04,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2757 transitions. [2023-08-24 15:03:04,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:03:04,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2757 transitions. [2023-08-24 15:03:04,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 229.75) internal successors, (2757), 12 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:04,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:04,239 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 695.0) internal successors, (9035), 13 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:04,239 INFO L175 Difference]: Start difference. First operand has 345 places, 658 transitions, 12641 flow. Second operand 12 states and 2757 transitions. [2023-08-24 15:03:04,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 701 transitions, 14556 flow [2023-08-24 15:03:04,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 701 transitions, 13769 flow, removed 303 selfloop flow, removed 3 redundant places. [2023-08-24 15:03:04,924 INFO L231 Difference]: Finished difference. Result has 356 places, 665 transitions, 12592 flow [2023-08-24 15:03:04,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11860, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12592, PETRI_PLACES=356, PETRI_TRANSITIONS=665} [2023-08-24 15:03:04,925 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 324 predicate places. [2023-08-24 15:03:04,925 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 665 transitions, 12592 flow [2023-08-24 15:03:04,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 224.25806451612902) internal successors, (6952), 31 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:04,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:03:04,926 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, 1, 1, 1, 1] [2023-08-24 15:03:04,931 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 15:03:05,131 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 15:03:05,131 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 15:03:05,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:03:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash 394327351, now seen corresponding path program 42 times [2023-08-24 15:03:05,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:03:05,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071272540] [2023-08-24 15:03:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:03:05,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:03:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:03:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:05,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:03:05,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071272540] [2023-08-24 15:03:05,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071272540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:03:05,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654316714] [2023-08-24 15:03:05,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:03:05,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:03:05,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:03:05,692 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 15:03:05,695 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 15:03:05,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:03:05,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:03:05,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-24 15:03:05,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:03:06,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:06,161 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 15:03:06,310 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:06,311 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 20 [2023-08-24 15:03:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:06,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:03:06,466 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_3121 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3121))) (let ((.cse0 (select .cse2 ~B~0.base))) (<= (+ c_~asum~0 c_~bsum~0 (select .cse0 .cse1)) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select .cse0 c_~B~0.offset)))))) (forall ((v_ArrVal_3121 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3121))) (let ((.cse4 (select .cse3 ~B~0.base))) (<= (+ (select (select .cse3 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select .cse4 c_~B~0.offset)) (+ c_~asum~0 c_~bsum~0 (select .cse4 .cse1)))))))) is different from false [2023-08-24 15:03:06,492 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:06,493 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 154 treesize of output 166 [2023-08-24 15:03:06,508 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:06,508 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 90 treesize of output 98 [2023-08-24 15:03:06,822 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:06,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654316714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:03:06,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:03:06,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-08-24 15:03:06,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202900037] [2023-08-24 15:03:06,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:03:06,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 15:03:06,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:03:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 15:03:06,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=637, Unknown=1, NotChecked=52, Total=812 [2023-08-24 15:03:06,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 695 [2023-08-24 15:03:06,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 665 transitions, 12592 flow. Second operand has 29 states, 29 states have (on average 236.55172413793105) internal successors, (6860), 29 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:06,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:03:06,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 695 [2023-08-24 15:03:06,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:03:09,354 INFO L124 PetriNetUnfolderBase]: 6018/8801 cut-off events. [2023-08-24 15:03:09,355 INFO L125 PetriNetUnfolderBase]: For 180377/180377 co-relation queries the response was YES. [2023-08-24 15:03:09,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64409 conditions, 8801 events. 6018/8801 cut-off events. For 180377/180377 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 47514 event pairs, 2011 based on Foata normal form. 1/8802 useless extension candidates. Maximal degree in co-relation 63698. Up to 8199 conditions per place. [2023-08-24 15:03:09,451 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 515 selfloop transitions, 192 changer transitions 1/708 dead transitions. [2023-08-24 15:03:09,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 708 transitions, 14489 flow [2023-08-24 15:03:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:03:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:03:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2435 transitions. [2023-08-24 15:03:09,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35035971223021584 [2023-08-24 15:03:09,454 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2435 transitions. [2023-08-24 15:03:09,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2435 transitions. [2023-08-24 15:03:09,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:03:09,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2435 transitions. [2023-08-24 15:03:09,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.5) internal successors, (2435), 10 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:09,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 695.0) internal successors, (7645), 11 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:09,459 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 695.0) internal successors, (7645), 11 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:09,459 INFO L175 Difference]: Start difference. First operand has 356 places, 665 transitions, 12592 flow. Second operand 10 states and 2435 transitions. [2023-08-24 15:03:09,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 708 transitions, 14489 flow [2023-08-24 15:03:10,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 708 transitions, 13883 flow, removed 117 selfloop flow, removed 8 redundant places. [2023-08-24 15:03:10,355 INFO L231 Difference]: Finished difference. Result has 359 places, 670 transitions, 12642 flow [2023-08-24 15:03:10,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11992, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12642, PETRI_PLACES=359, PETRI_TRANSITIONS=670} [2023-08-24 15:03:10,356 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 327 predicate places. [2023-08-24 15:03:10,356 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 670 transitions, 12642 flow [2023-08-24 15:03:10,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 236.55172413793105) internal successors, (6860), 29 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:10,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:03:10,357 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, 1, 1, 1, 1] [2023-08-24 15:03:10,362 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 15:03:10,562 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 15:03:10,562 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 15:03:10,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:03:10,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1238648023, now seen corresponding path program 43 times [2023-08-24 15:03:10,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:03:10,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753641687] [2023-08-24 15:03:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:03:10,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:03:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:03:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:11,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:03:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753641687] [2023-08-24 15:03:11,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753641687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:03:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768654397] [2023-08-24 15:03:11,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:03:11,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:03:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:03:11,184 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 15:03:11,186 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 15:03:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:03:11,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-24 15:03:11,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:03:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:11,735 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 15:03:11,735 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-08-24 15:03:11,809 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:11,809 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 20 [2023-08-24 15:03:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:11,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:03:11,936 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3188 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3188))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_3188 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3188))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-08-24 15:03:11,948 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3188 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3188))) (+ (select (select .cse0 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) .cse1)) (forall ((v_ArrVal_3188 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3188))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))))))) is different from false [2023-08-24 15:03:11,984 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:11,984 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 158 treesize of output 154 [2023-08-24 15:03:11,993 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:11,994 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 78 treesize of output 78 [2023-08-24 15:03:12,351 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:12,352 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:12,397 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 15:03:12,398 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 34 treesize of output 57 [2023-08-24 15:03:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-24 15:03:12,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768654397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:03:12,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:03:12,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 15:03:12,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687839599] [2023-08-24 15:03:12,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:03:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:03:12,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:03:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:03:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=644, Unknown=2, NotChecked=106, Total=870 [2023-08-24 15:03:12,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 695 [2023-08-24 15:03:12,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 670 transitions, 12642 flow. Second operand has 30 states, 30 states have (on average 230.33333333333334) internal successors, (6910), 30 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:12,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:03:12,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 695 [2023-08-24 15:03:12,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:03:15,487 INFO L124 PetriNetUnfolderBase]: 6146/8990 cut-off events. [2023-08-24 15:03:15,487 INFO L125 PetriNetUnfolderBase]: For 197617/197617 co-relation queries the response was YES. [2023-08-24 15:03:15,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66303 conditions, 8990 events. 6146/8990 cut-off events. For 197617/197617 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 48810 event pairs, 1929 based on Foata normal form. 1/8991 useless extension candidates. Maximal degree in co-relation 65590. Up to 8061 conditions per place. [2023-08-24 15:03:15,568 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 509 selfloop transitions, 210 changer transitions 1/720 dead transitions. [2023-08-24 15:03:15,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 720 transitions, 14926 flow [2023-08-24 15:03:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:03:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:03:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2151 transitions. [2023-08-24 15:03:15,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34388489208633094 [2023-08-24 15:03:15,570 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2151 transitions. [2023-08-24 15:03:15,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2151 transitions. [2023-08-24 15:03:15,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:03:15,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2151 transitions. [2023-08-24 15:03:15,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 239.0) internal successors, (2151), 9 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:15,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:15,574 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:15,574 INFO L175 Difference]: Start difference. First operand has 359 places, 670 transitions, 12642 flow. Second operand 9 states and 2151 transitions. [2023-08-24 15:03:15,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 720 transitions, 14926 flow [2023-08-24 15:03:16,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 720 transitions, 14334 flow, removed 112 selfloop flow, removed 7 redundant places. [2023-08-24 15:03:16,226 INFO L231 Difference]: Finished difference. Result has 363 places, 679 transitions, 13101 flow [2023-08-24 15:03:16,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=12064, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13101, PETRI_PLACES=363, PETRI_TRANSITIONS=679} [2023-08-24 15:03:16,227 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 331 predicate places. [2023-08-24 15:03:16,227 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 679 transitions, 13101 flow [2023-08-24 15:03:16,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 230.33333333333334) internal successors, (6910), 30 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:16,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:03:16,228 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, 1, 1, 1, 1] [2023-08-24 15:03:16,236 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 15:03:16,433 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 15:03:16,433 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 15:03:16,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:03:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2072208401, now seen corresponding path program 44 times [2023-08-24 15:03:16,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:03:16,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776805995] [2023-08-24 15:03:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:03:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:03:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:03:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:03:17,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:03:17,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776805995] [2023-08-24 15:03:17,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776805995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:03:17,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548125686] [2023-08-24 15:03:17,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:03:17,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:03:17,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:03:17,440 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 15:03:17,442 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 15:03:17,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:03:17,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:03:17,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 15:03:17,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:03:17,712 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 15:03:17,712 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-24 15:03:17,763 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 15:03:17,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-24 15:03:17,819 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:03:17,819 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 11 treesize of output 11 [2023-08-24 15:03:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:18,168 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 15:03:18,266 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:03:18,267 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-08-24 15:03:18,383 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:18,384 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 66 treesize of output 94 [2023-08-24 15:03:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:18,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:03:18,853 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((~C~0.offset Int) (v_ArrVal_3260 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3260))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 .cse1 c_~csum~0) (+ (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~A~0.base) .cse3) c_~asum~0 c_~bsum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_3260 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3260))) (let ((.cse5 (select (select .cse4 c_~A~0.base) c_~A~0.offset)) (.cse6 (select (select .cse4 c_~B~0.base) c_~B~0.offset))) (<= (+ (select (select (store .cse4 c_~C~0.base (store (select .cse4 c_~C~0.base) ~C~0.offset (+ .cse5 .cse6))) c_~A~0.base) .cse3) c_~asum~0 c_~bsum~0) (+ .cse5 .cse6 c_~csum~0))))))) is different from false [2023-08-24 15:03:18,880 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:18,880 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 2610 treesize of output 2282 [2023-08-24 15:03:18,911 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:18,912 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 722 treesize of output 662 [2023-08-24 15:03:22,253 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:22,280 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:22,298 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:26,887 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:26,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 98 [2023-08-24 15:03:27,070 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:27,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 117 [2023-08-24 15:03:27,294 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:27,295 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 75 [2023-08-24 15:03:27,483 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:27,483 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 24 treesize of output 47 [2023-08-24 15:03:27,556 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:27,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 645 treesize of output 449 [2023-08-24 15:03:29,385 INFO L322 Elim1Store]: treesize reduction 5, result has 86.5 percent of original size [2023-08-24 15:03:29,385 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 115 treesize of output 100 [2023-08-24 15:03:29,452 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 12 treesize of output 6 [2023-08-24 15:03:29,462 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:29,505 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:29,505 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 529 treesize of output 397 [2023-08-24 15:03:29,582 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 12 treesize of output 6 [2023-08-24 15:03:29,593 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:29,593 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 18 treesize of output 19 [2023-08-24 15:03:29,619 INFO L322 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-08-24 15:03:29,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 1 [2023-08-24 15:03:29,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:29,624 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-08-24 15:03:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:29,632 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-08-24 15:03:29,648 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 15:03:29,648 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 26 treesize of output 22 [2023-08-24 15:03:29,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:29,669 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-08-24 15:03:29,931 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:29,935 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:29,938 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:29,942 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:29,962 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:29,972 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:29,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 381 treesize of output 277 [2023-08-24 15:03:30,325 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 14 treesize of output 8 [2023-08-24 15:03:30,337 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:30,349 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:30,361 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:30,362 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 474 treesize of output 314 [2023-08-24 15:03:30,611 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:30,618 INFO L322 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-08-24 15:03:30,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 495 treesize of output 1 [2023-08-24 15:03:30,698 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:30,699 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:30,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 47 [2023-08-24 15:03:30,718 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 12 treesize of output 6 [2023-08-24 15:03:30,738 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:30,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-08-24 15:03:30,774 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:30,794 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:30,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-08-24 15:03:30,836 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:30,836 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 64 [2023-08-24 15:03:30,861 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:30,872 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:30,873 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 143 treesize of output 111 [2023-08-24 15:03:31,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 481 treesize of output 461 [2023-08-24 15:03:31,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:31,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 395 treesize of output 241 [2023-08-24 15:03:31,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:31,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-24 15:03:31,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:31,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-24 15:03:31,181 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:31,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:31,196 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-24 15:03:31,230 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:31,231 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:31,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:31,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 381 treesize of output 244 [2023-08-24 15:03:31,286 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:31,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:31,298 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-24 15:03:31,326 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 15:03:31,340 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:31,341 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:31,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:31,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 139 [2023-08-24 15:03:31,469 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:31,470 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:31,513 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 15:03:31,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 228 [2023-08-24 15:03:31,528 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:31,528 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 50 treesize of output 43 [2023-08-24 15:03:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:32,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548125686] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:03:32,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:03:32,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-08-24 15:03:32,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405362205] [2023-08-24 15:03:32,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:03:32,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 15:03:32,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:03:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 15:03:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1053, Unknown=1, NotChecked=66, Total=1260 [2023-08-24 15:03:32,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 15:03:32,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 679 transitions, 13101 flow. Second operand has 36 states, 36 states have (on average 202.83333333333334) internal successors, (7302), 36 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:32,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:03:32,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 15:03:32,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:03:34,966 INFO L124 PetriNetUnfolderBase]: 6242/9128 cut-off events. [2023-08-24 15:03:34,967 INFO L125 PetriNetUnfolderBase]: For 202262/202262 co-relation queries the response was YES. [2023-08-24 15:03:35,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67984 conditions, 9128 events. 6242/9128 cut-off events. For 202262/202262 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 49435 event pairs, 2130 based on Foata normal form. 1/9129 useless extension candidates. Maximal degree in co-relation 67268. Up to 8568 conditions per place. [2023-08-24 15:03:35,075 INFO L140 encePairwiseOnDemand]: 679/695 looper letters, 522 selfloop transitions, 209 changer transitions 1/732 dead transitions. [2023-08-24 15:03:35,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 732 transitions, 15416 flow [2023-08-24 15:03:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 15:03:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 15:03:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2910 transitions. [2023-08-24 15:03:35,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29907502569373073 [2023-08-24 15:03:35,078 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2910 transitions. [2023-08-24 15:03:35,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2910 transitions. [2023-08-24 15:03:35,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:03:35,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2910 transitions. [2023-08-24 15:03:35,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 207.85714285714286) internal successors, (2910), 14 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:35,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 695.0) internal successors, (10425), 15 states have internal predecessors, (10425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:35,084 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 695.0) internal successors, (10425), 15 states have internal predecessors, (10425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:35,084 INFO L175 Difference]: Start difference. First operand has 363 places, 679 transitions, 13101 flow. Second operand 14 states and 2910 transitions. [2023-08-24 15:03:35,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 732 transitions, 15416 flow [2023-08-24 15:03:35,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 732 transitions, 14683 flow, removed 255 selfloop flow, removed 4 redundant places. [2023-08-24 15:03:35,871 INFO L231 Difference]: Finished difference. Result has 376 places, 702 transitions, 13529 flow [2023-08-24 15:03:35,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=12385, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13529, PETRI_PLACES=376, PETRI_TRANSITIONS=702} [2023-08-24 15:03:35,871 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 344 predicate places. [2023-08-24 15:03:35,872 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 702 transitions, 13529 flow [2023-08-24 15:03:35,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 202.83333333333334) internal successors, (7302), 36 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:35,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:03:35,872 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, 1, 1, 1, 1] [2023-08-24 15:03:35,879 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 15:03:36,077 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 15:03:36,078 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 15:03:36,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:03:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash 576678327, now seen corresponding path program 45 times [2023-08-24 15:03:36,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:03:36,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646119278] [2023-08-24 15:03:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:03:36,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:03:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:03:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:36,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:03:36,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646119278] [2023-08-24 15:03:36,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646119278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:03:36,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109497545] [2023-08-24 15:03:36,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:03:36,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:03:36,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:03:36,601 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 15:03:36,603 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 15:03:36,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:03:36,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:03:36,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-24 15:03:36,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:03:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:37,115 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 21 treesize of output 21 [2023-08-24 15:03:37,251 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:37,251 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 35 treesize of output 23 [2023-08-24 15:03:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:37,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:03:37,397 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((v_ArrVal_3327 (Array Int Int)) (~A~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3327))) (let ((.cse0 (select .cse2 ~A~0.base))) (<= (+ c_~asum~0 c_~bsum~0 (select .cse0 .cse1)) (+ (select .cse0 c_~A~0.offset) c_~csum~0 (select (select .cse2 c_~B~0.base) c_~B~0.offset)))))) (forall ((v_ArrVal_3327 (Array Int Int)) (~A~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3327))) (let ((.cse3 (select .cse4 ~A~0.base))) (<= (+ (select .cse3 c_~A~0.offset) c_~csum~0 (select (select .cse4 c_~B~0.base) c_~B~0.offset)) (+ c_~asum~0 c_~bsum~0 (select .cse3 .cse1)))))))) is different from false [2023-08-24 15:03:37,429 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:37,429 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 154 treesize of output 166 [2023-08-24 15:03:37,448 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:37,448 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 90 treesize of output 98 [2023-08-24 15:03:37,628 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109497545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:03:37,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:03:37,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-24 15:03:37,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742464095] [2023-08-24 15:03:37,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:03:37,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 15:03:37,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:03:37,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 15:03:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=545, Unknown=1, NotChecked=48, Total=702 [2023-08-24 15:03:37,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 695 [2023-08-24 15:03:37,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 702 transitions, 13529 flow. Second operand has 27 states, 27 states have (on average 230.59259259259258) internal successors, (6226), 27 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:37,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:03:37,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 695 [2023-08-24 15:03:37,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:03:40,351 INFO L124 PetriNetUnfolderBase]: 6302/9217 cut-off events. [2023-08-24 15:03:40,351 INFO L125 PetriNetUnfolderBase]: For 198695/198695 co-relation queries the response was YES. [2023-08-24 15:03:40,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69903 conditions, 9217 events. 6302/9217 cut-off events. For 198695/198695 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 50266 event pairs, 2175 based on Foata normal form. 1/9218 useless extension candidates. Maximal degree in co-relation 69162. Up to 8629 conditions per place. [2023-08-24 15:03:40,487 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 542 selfloop transitions, 198 changer transitions 1/741 dead transitions. [2023-08-24 15:03:40,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 741 transitions, 15506 flow [2023-08-24 15:03:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:03:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:03:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2143 transitions. [2023-08-24 15:03:40,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3426059152677858 [2023-08-24 15:03:40,491 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2143 transitions. [2023-08-24 15:03:40,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2143 transitions. [2023-08-24 15:03:40,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:03:40,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2143 transitions. [2023-08-24 15:03:40,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 238.11111111111111) internal successors, (2143), 9 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:40,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:40,496 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 695.0) internal successors, (6950), 10 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:40,496 INFO L175 Difference]: Start difference. First operand has 376 places, 702 transitions, 13529 flow. Second operand 9 states and 2143 transitions. [2023-08-24 15:03:40,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 741 transitions, 15506 flow [2023-08-24 15:03:41,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 741 transitions, 14835 flow, removed 217 selfloop flow, removed 8 redundant places. [2023-08-24 15:03:41,223 INFO L231 Difference]: Finished difference. Result has 378 places, 707 transitions, 13536 flow [2023-08-24 15:03:41,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=12864, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13536, PETRI_PLACES=378, PETRI_TRANSITIONS=707} [2023-08-24 15:03:41,232 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 346 predicate places. [2023-08-24 15:03:41,233 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 707 transitions, 13536 flow [2023-08-24 15:03:41,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 230.59259259259258) internal successors, (6226), 27 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:41,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:03:41,233 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, 1, 1, 1, 1] [2023-08-24 15:03:41,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-24 15:03:41,436 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 15:03:41,437 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 15:03:41,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:03:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1519195237, now seen corresponding path program 46 times [2023-08-24 15:03:41,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:03:41,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671996928] [2023-08-24 15:03:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:03:41,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:03:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:03:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:42,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:03:42,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671996928] [2023-08-24 15:03:42,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671996928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:03:42,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340674398] [2023-08-24 15:03:42,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:03:42,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:03:42,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:03:42,090 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 15:03:42,092 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 15:03:42,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:03:42,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:03:42,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 81 conjunts are in the unsatisfiable core [2023-08-24 15:03:42,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:03:42,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:42,552 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 15:03:42,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:42,593 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 15:03:42,718 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:42,719 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 20 [2023-08-24 15:03:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:42,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:03:42,870 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3395 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3395) c_~A~0.base) c_~A~0.offset) c_~csum~0) .cse0)) (forall ((v_ArrVal_3395 (Array Int Int))) (<= .cse0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3395) c_~A~0.base) c_~A~0.offset) c_~csum~0))))) is different from false [2023-08-24 15:03:42,879 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3394 (Array Int Int)) (v_ArrVal_3395 (Array Int Int))) (<= .cse0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3394) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3395) c_~A~0.base) c_~A~0.offset) c_~csum~0))) (forall ((v_ArrVal_3394 (Array Int Int)) (v_ArrVal_3395 (Array Int Int))) (<= (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3394) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3395) c_~A~0.base) c_~A~0.offset) c_~csum~0) .cse0)))) is different from false [2023-08-24 15:03:42,888 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:42,889 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 218 treesize of output 154 [2023-08-24 15:03:42,892 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 33 treesize of output 31 [2023-08-24 15:03:42,895 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 34 treesize of output 30 [2023-08-24 15:03:42,912 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:42,912 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-24 15:03:43,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340674398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:03:43,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:03:43,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 29 [2023-08-24 15:03:43,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595564183] [2023-08-24 15:03:43,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:03:43,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 15:03:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:03:43,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 15:03:43,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=694, Unknown=2, NotChecked=110, Total=930 [2023-08-24 15:03:43,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 695 [2023-08-24 15:03:43,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 707 transitions, 13536 flow. Second operand has 31 states, 31 states have (on average 233.19354838709677) internal successors, (7229), 31 states have internal predecessors, (7229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:43,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:03:43,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 695 [2023-08-24 15:03:43,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:03:45,574 INFO L124 PetriNetUnfolderBase]: 6397/9359 cut-off events. [2023-08-24 15:03:45,575 INFO L125 PetriNetUnfolderBase]: For 188837/188837 co-relation queries the response was YES. [2023-08-24 15:03:45,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70723 conditions, 9359 events. 6397/9359 cut-off events. For 188837/188837 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 51092 event pairs, 1302 based on Foata normal form. 1/9360 useless extension candidates. Maximal degree in co-relation 70003. Up to 8150 conditions per place. [2023-08-24 15:03:45,707 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 479 selfloop transitions, 294 changer transitions 1/774 dead transitions. [2023-08-24 15:03:45,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 774 transitions, 15845 flow [2023-08-24 15:03:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:03:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:03:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2409 transitions. [2023-08-24 15:03:45,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3466187050359712 [2023-08-24 15:03:45,709 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2409 transitions. [2023-08-24 15:03:45,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2409 transitions. [2023-08-24 15:03:45,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:03:45,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2409 transitions. [2023-08-24 15:03:45,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 240.9) internal successors, (2409), 10 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:45,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 695.0) internal successors, (7645), 11 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:45,714 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 695.0) internal successors, (7645), 11 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:45,714 INFO L175 Difference]: Start difference. First operand has 378 places, 707 transitions, 13536 flow. Second operand 10 states and 2409 transitions. [2023-08-24 15:03:45,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 774 transitions, 15845 flow [2023-08-24 15:03:46,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 774 transitions, 15245 flow, removed 110 selfloop flow, removed 6 redundant places. [2023-08-24 15:03:46,553 INFO L231 Difference]: Finished difference. Result has 385 places, 725 transitions, 14172 flow [2023-08-24 15:03:46,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=12942, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14172, PETRI_PLACES=385, PETRI_TRANSITIONS=725} [2023-08-24 15:03:46,554 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 353 predicate places. [2023-08-24 15:03:46,554 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 725 transitions, 14172 flow [2023-08-24 15:03:46,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 233.19354838709677) internal successors, (7229), 31 states have internal predecessors, (7229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:46,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:03:46,554 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, 1, 1, 1, 1] [2023-08-24 15:03:46,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-24 15:03:46,759 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 15:03:46,759 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 15:03:46,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:03:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash -795335535, now seen corresponding path program 47 times [2023-08-24 15:03:46,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:03:46,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179619924] [2023-08-24 15:03:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:03:46,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:03:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:03:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:47,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:03:47,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179619924] [2023-08-24 15:03:47,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179619924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:03:47,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14679825] [2023-08-24 15:03:47,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:03:47,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:03:47,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:03:47,256 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 15:03:47,257 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 15:03:47,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:03:47,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:03:47,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 15:03:47,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:03:47,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:03:47,539 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:03:47,539 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 11 treesize of output 11 [2023-08-24 15:03:47,715 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:03:47,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-08-24 15:03:47,829 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:47,829 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 102 treesize of output 106 [2023-08-24 15:03:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:47,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:03:48,141 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:48,141 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 74 treesize of output 118 [2023-08-24 15:03:48,318 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:03:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:48,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14679825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:03:48,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:03:48,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-08-24 15:03:48,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993352589] [2023-08-24 15:03:48,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:03:48,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:03:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:03:48,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:03:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:03:48,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 15:03:48,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 725 transitions, 14172 flow. Second operand has 21 states, 21 states have (on average 226.57142857142858) internal successors, (4758), 21 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:48,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:03:48,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 15:03:48,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:03:51,081 INFO L124 PetriNetUnfolderBase]: 6457/9448 cut-off events. [2023-08-24 15:03:51,081 INFO L125 PetriNetUnfolderBase]: For 200025/200025 co-relation queries the response was YES. [2023-08-24 15:03:51,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72470 conditions, 9448 events. 6457/9448 cut-off events. For 200025/200025 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 51629 event pairs, 2289 based on Foata normal form. 1/9449 useless extension candidates. Maximal degree in co-relation 71746. Up to 8968 conditions per place. [2023-08-24 15:03:51,173 INFO L140 encePairwiseOnDemand]: 683/695 looper letters, 586 selfloop transitions, 178 changer transitions 1/765 dead transitions. [2023-08-24 15:03:51,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 765 transitions, 16235 flow [2023-08-24 15:03:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:03:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:03:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2555 transitions. [2023-08-24 15:03:51,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342053629823414 [2023-08-24 15:03:51,175 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2555 transitions. [2023-08-24 15:03:51,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2555 transitions. [2023-08-24 15:03:51,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:03:51,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2555 transitions. [2023-08-24 15:03:51,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 232.27272727272728) internal successors, (2555), 11 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:51,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:51,180 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 695.0) internal successors, (8340), 12 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:51,180 INFO L175 Difference]: Start difference. First operand has 385 places, 725 transitions, 14172 flow. Second operand 11 states and 2555 transitions. [2023-08-24 15:03:51,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 765 transitions, 16235 flow [2023-08-24 15:03:51,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 765 transitions, 15529 flow, removed 163 selfloop flow, removed 4 redundant places. [2023-08-24 15:03:51,854 INFO L231 Difference]: Finished difference. Result has 394 places, 731 transitions, 14159 flow [2023-08-24 15:03:51,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=13472, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14159, PETRI_PLACES=394, PETRI_TRANSITIONS=731} [2023-08-24 15:03:51,855 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 362 predicate places. [2023-08-24 15:03:51,855 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 731 transitions, 14159 flow [2023-08-24 15:03:51,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 226.57142857142858) internal successors, (4758), 21 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:03:51,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:03:51,855 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, 1, 1, 1, 1] [2023-08-24 15:03:51,861 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 15:03:52,060 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 15:03:52,060 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 15:03:52,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:03:52,061 INFO L85 PathProgramCache]: Analyzing trace with hash -991593695, now seen corresponding path program 48 times [2023-08-24 15:03:52,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:03:52,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189745928] [2023-08-24 15:03:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:03:52,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:03:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:03:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:03:52,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:03:52,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189745928] [2023-08-24 15:03:52,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189745928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:03:52,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664809919] [2023-08-24 15:03:52,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:03:52,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:03:52,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:03:52,809 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 15:03:52,811 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 15:03:53,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:03:53,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:03:53,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 15:03:53,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:03:53,098 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15:03:53,147 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:03:53,147 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 11 treesize of output 11 [2023-08-24 15:03:53,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:53,329 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 15:03:53,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:03:53,396 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 15:03:53,540 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 15:03:53,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-08-24 15:03:53,657 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:53,657 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 102 treesize of output 106 [2023-08-24 15:03:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:03:53,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:03:54,259 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_3531 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3531))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) c_~B~0.offset)))))) (forall ((~C~0.offset Int) (v_ArrVal_3531 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3531))) (let ((.cse4 (select (select .cse3 c_~A~0.base) c_~A~0.offset)) (.cse5 (select (select .cse3 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse3 c_~C~0.base (store (select .cse3 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) c_~B~0.offset)) (+ .cse4 c_~csum~0 .cse5)))))) is different from false [2023-08-24 15:03:54,274 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_3530 (Array Int Int)) (v_ArrVal_3531 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3530) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3531))) (let ((.cse1 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (.cse2 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ c_~csum~0 .cse1 .cse2))))) (forall ((~C~0.offset Int) (v_ArrVal_3530 (Array Int Int)) (v_ArrVal_3531 (Array Int Int))) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3530) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3531))) (let ((.cse3 (select (select .cse5 c_~A~0.base) c_~A~0.offset)) (.cse4 (select (select .cse5 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~csum~0 .cse3 .cse4) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-24 15:03:54,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:54,392 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 199782 treesize of output 182510 [2023-08-24 15:03:54,615 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:54,616 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 4598 treesize of output 4350 [2023-08-24 15:03:54,676 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:03:54,676 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 4558 treesize of output 4438 Received shutdown request... [2023-08-24 15:13:38,962 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-24 15:13:38,968 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 15:13:38,969 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 15:13:38,969 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 15:13:38,974 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 15:13:39,173 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 15:13:39,174 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 24ms.. [2023-08-24 15:13:39,175 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 15:13:39,175 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 15:13:39,175 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 15:13:39,175 INFO L445 BasicCegarLoop]: Path program histogram: [48, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:13:39,177 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 15:13:39,177 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 15:13:39,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:13:39 BasicIcfg [2023-08-24 15:13:39,179 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 15:13:39,179 INFO L158 Benchmark]: Toolchain (without parser) took 839630.15ms. Allocated memory was 346.0MB in the beginning and 7.3GB in the end (delta: 7.0GB). Free memory was 323.2MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 6.8GB. Max. memory is 16.0GB. [2023-08-24 15:13:39,179 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 346.0MB. Free memory is still 323.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 15:13:39,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 140.61ms. Allocated memory is still 346.0MB. Free memory was 322.6MB in the beginning and 311.2MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 15:13:39,179 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.95ms. Allocated memory is still 346.0MB. Free memory was 311.2MB in the beginning and 308.5MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-24 15:13:39,180 INFO L158 Benchmark]: Boogie Preprocessor took 40.12ms. Allocated memory is still 346.0MB. Free memory was 308.5MB in the beginning and 306.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 15:13:39,180 INFO L158 Benchmark]: RCFGBuilder took 484.32ms. Allocated memory is still 346.0MB. Free memory was 306.4MB in the beginning and 281.3MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-24 15:13:39,180 INFO L158 Benchmark]: TraceAbstraction took 838912.17ms. Allocated memory was 346.0MB in the beginning and 7.3GB in the end (delta: 7.0GB). Free memory was 280.7MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 6.7GB. Max. memory is 16.0GB. [2023-08-24 15:13:39,180 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 346.0MB. Free memory is still 323.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 140.61ms. Allocated memory is still 346.0MB. Free memory was 322.6MB in the beginning and 311.2MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.95ms. Allocated memory is still 346.0MB. Free memory was 311.2MB in the beginning and 308.5MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 40.12ms. Allocated memory is still 346.0MB. Free memory was 308.5MB in the beginning and 306.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 484.32ms. Allocated memory is still 346.0MB. Free memory was 306.4MB in the beginning and 281.3MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 838912.17ms. Allocated memory was 346.0MB in the beginning and 7.3GB in the end (delta: 7.0GB). Free memory was 280.7MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 6.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.3s, 295 PlacesBefore, 32 PlacesAfterwards, 314 TransitionsBefore, 28 TransitionsAfterwards, 13388 CoEnabledTransitionPairs, 9 FixpointIterations, 141 TrivialSequentialCompositions, 124 ConcurrentSequentialCompositions, 40 TrivialYvCompositions, 40 ConcurrentYvCompositions, 23 ChoiceCompositions, 368 TotalNumberOfCompositions, 13040 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12353, independent: 12292, independent conditional: 0, independent unconditional: 12292, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7768, independent: 7723, independent conditional: 0, independent unconditional: 7723, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 12353, independent: 4569, independent conditional: 0, independent unconditional: 4569, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 7768, unknown conditional: 0, unknown unconditional: 7768] , Statistics on independence cache: Total cache size (in pairs): 59, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 24ms.. - 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 analyzing trace of length 29 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 24ms.. - 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 analyzing trace of length 29 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 24ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 24ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 419 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: 838.8s, OverallIterations: 55, TraceHistogramMax: 1, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.0s, AutomataDifference: 96.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4520 SdHoareTripleChecker+Valid, 20.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4520 mSDsluCounter, 2716 SdHoareTripleChecker+Invalid, 17.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2076 IncrementalHoareTripleChecker+Unchecked, 2371 mSDsCounter, 387 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 36374 IncrementalHoareTripleChecker+Invalid, 38837 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 387 mSolverCounterUnsat, 345 mSDtfsCounter, 36374 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3529 GetRequests, 1984 SyntacticMatches, 116 SemanticMatches, 1429 ConstructedPredicates, 21 IntricatePredicates, 3 DeprecatedPredicates, 12023 ImplicationChecksByTransitivity, 49.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14172occurred in iteration=53, InterpolantAutomatonStates: 563, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 126.2s InterpolantComputationTime, 2881 NumberOfCodeBlocks, 2881 NumberOfCodeBlocksAsserted, 152 NumberOfCheckSat, 4122 ConstructedInterpolants, 287 QuantifiedInterpolants, 95639 SizeOfPredicates, 1283 NumberOfNonLiveVariables, 18377 ConjunctsInSsa, 3937 ConjunctsInUnsatCore, 154 InterpolantComputations, 7 PerfectInterpolantSequences, 431/888 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